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Reports on Recent Events of Interest to CVS Members

Field Workshop
Submarine and emergent volcanic arcs and associated volcano-sedimentary basins: facies models, petrology and volcano tectonics
Cabo de Gata, Almeria SE Spain, 2 – 7 May 2011

An international workshop partially promoted by the Commission on Volcanogenic Sediments was held in the Cabo de Gata region in southern Spain on subaqueous volcanism. Top expert researchers and students attended on the meeting and shared their view on various aspects of subaqueous volcanism from the architecture and processes of active and ancient submarine to emergent volcanic arcs and associated volcano-sedimentary basins. The workshop was arranged to provide extensive field visit to a relatively less known but superbly exposed volcanic region. The field visit served great opportunity to share expertise and views of the origin of rock textures associated with any form of subaqueous volcanism. The “in situ” discussions over the origin of the visited field sites were very effective way to learn and share knowledge.

Cabo de Gata area (Almeria, SE Spain) is a region where Miocene volcanic arc rocks exposed in extensive coastal section including sections across virtually undeformed and continuous submarine to subaerial volcanic and volcano-sedimentary rock successions.

Click on any image below to view full size.

IAVCEI – CEV – CVS Field workshop
Phreatomagmatic volcanoes of Jeju Island, Korea. 13 -17 November, 2007

A scientific field workshop sponsored by two commissions (Commission on Explosive Volcanism – CEV and Commission on Volcanogenic Sediments - CVS) of the International Association of Volcanology and Chemistry of the Earth Interior (IAVCEI) took place in Jeju Island, South Korea (Figs 1, 2 and 3) between 13th and 17th of November 2007. This was organised by Prof Dr Young Kwan Sohn (Gyeongsan National University, Jinju) and Dr. Ki Hwa Park (Korea Institute of Geoscience and Mineral Resources, Daejon). The "Phreatomagmatic volcanoes of Jeju Island,Korea: Morphology, architecture, lithofacies, and processes" field workshop was a pre-conference field trip associated with the Cities on Volcanoes 5 conference in Shimabara.

Fig 1: Location of Jeju Island

Fig 2: Topographic map of Jeju Island shows the visited and most important volcanic sites of Jeju.

Fig 3: Geological map of Jeju Island

The field workshop was intended to bring together researchers (Fig. 4) interested in eruptive processes of phreatomagmatic volcanism, transportation and depositional processes of pyroclastic density currents, reworking and geomorphic evolution of phreatomagmatic volcanoes. The spectacular environment and exposures on Jeju Island promised an opportunity to discuss key processes in the growth of particularly tuff rings and cones. The participating researchers came from diverse areas of expertise such as sedimentology, volcanology, numerical and analog modelling, experimental volcanology and volcanic hazard studies. The field workshop also served as a forum through which Korean earth scientists and students could interact with international counterparts in sedimentology and volcanology. A key aspect was also the discussion and input into future research programmes on volcanology in Korea. The field site of Jeju Island has been an icon for the last 20 years in development of ideas and models of volcano-sedimentary systems associated with phreatomagmatism. Jeju is a Special Self-Governing Province and its government provided enthusiastic support to the logistics and financing of this field workshop (Fig. 5), with several government representatives participating in both the field and evening scientific sessions of the meeting.

Fig 4: Group photo of the field workshop participants in the front of the pyroclastic sequence of the Yongmeori tuff ring

Fig 5: Jeju Special Self-Governing Province provided boat for visiting off shore islands around Jeju.

Jeju (sometimes translated as Cheju) Island is located southwest of the Korean peninsula (between Long. 126'10'' and 126' 58'', Lat. 33' 12'' and 33' 34'') (Fig. 1). Its oval form (1,845km2) stretches 73 km from east to west and 41km from north to south, 263 km of seashore (Figs 2 and 3). Mt. Hallasan rises to 1,950 m in the center of the island to dominate the landscape (Fig. 6), and its surrounding smooth flanks are pimpled by around 360 scoria cones, tuff rings, tuff cones, as well as a number of trachytic domes. In the near shore areas, remnants of phreatomagmatic volcanoes form the dominant volcanic landforms.

Fig 6: Mt Hallasan dominates the landscape in the centre of Jeju Island.

Jeju Island is comprised of a submarine volcanic pile (of c. 100 m thickness) capped by up to several hundred metres of mafic (alkali basaltic and tholietic) lavas flows as well as the monogenetic volcanic cones and rare superficial sedimentary deposits (Fig. 3). The island mostly lacks surface water, hence the abundant groundwater is used to sustain its c. 500 000 local population and >2 million tourist visitors (Won et al., 2006). The hydrogeology and the importance of understanding the sedimentary facies architecture of Jeju drew early attention to the subsurface structure and volcaniclastic facies of the island. The basement of Jeju Island is a Jurassic to Cretaceous granitoid and silicic volcanic rock succession, which is overlain by a Pliocene marine sand and mud sucession (the U Formation; (Sohn and Park, 2004). The oldest volcanic deposits are represented by the the Seoguipo Formation (Fig. 7); envisaged to comprise multiple, superposed hydromagmatic volcanoes with intervening, marine or nonmarine sedimentary sequences with an age of Early to Middle Pleistocene (Sohn and Park, 2004). This is overlain by a thick succession of Middle to Late Pleistocene basaltic to trachytic plateau-forming lavas. The youngest volcanic units include Late Pleistocene to Holocene primary pyroclastic deposits of scoria and tuff cones along with restricted locally reworked volcaniclastics associated with these. An extrodinarily stable tectonic regime over the last 2 Ma has meant that edifices erupted at or near present sea level are typically subject to ongoing wave-erosion and are hence excellently exposed at the coast. The youngest mafic explosive volcanism in Jeju is dated to within thousand years old with several known Holocene eruptive sites (Cheong et al., 2007; Cheong et al., 2006). Hence Jeju is also considered to be a potentially active volcanic field. The primary mafic explosive pyroclastic successions are dominated by base surge and phreatomagmatic fall deposits associated with world-type example tuff cones such as Seongsan Ilchulbong (Fig. 8) (Sohn and Chough, 1992), Dangsangbong and Udo (Sohn and Chough, 1993) as well as with tuff rings such as Suwolbong (Fig. 9) (Sohn and Chough, 1989), Yongmeori, and Songaksan (Chough and Sohn, 1990; Sohn et al., 2003). Jeju Island is also a perfect site to observe field and/or outcrop-scale features indicating vent migration, instability of vent zones, and evolution of a phreatomagmatic crater over "hard" and "soft" rock environments (Sohn and Park, 2005). The great variety of volcanic landforms from the dry magmatic lava tubes to subaqueously formed tuff cones played an important role in the inclusion of Jeju Island on the UNESCO’s World Natural Heritage site list in 2007. Recently, volcanic features such as Mt. Hallasan, Seongsan Ilchunbong tuff cone and several lava tubes have been officially accepted as world-heritage sites.

Fig 7: The group examines the Seoguipo Formation.

Fig 8: Ilchulbong tuff cone from the sea.

Fig 9: Base surge succession of the Suwolbong tuff ring

The field workshop started with a general presentation of introduction of the geology of Jeju Island on the 13th November. After the introduction the participating researchers visited the Ilchulbong tuff cone, a perfectly exposed tuff cone, officially became part of the UNESCO’s Natural World Heritage site. Ilchulbong tuff cone is a perfect site to examine the eruptive products of a growing Surtseyan-style tuff cone (Fig. 10). The 180 m high and about 600 m across tuff cone remnant has a large preserved crater. The deposits of the tuff cone are grouped into 4 main lithofacies associations in accordance to the composition, texture and relative position to its vent site. This site gave a chance to initiate good discussions about the growth of a tuff cone, its erosional processes, and lateral and vertical facies variations. On the second day, the group visited the Suwolbong tuff ring. In this site along the shore, the perfectly exposed pyroclastic units allowed the group to trace the distal phreatomagmatic successions to the more proximal areas, and examine the facies changes from dune bedded base surge beds to more massive facies (Fig. 11). This outcrop is certainly world class, and the group suggested its protection for future scientific references. Discussion on the style of magma – water interaction and the explosion locus location were especially fruitful and suggested future research to understand the eruptive mechanism and the 3D architecture of this tuff ring. In the same day the field workshop visited an older tuff cone. The Dangsanbong tuff cone exhibit erosional features and truncation surfaces, collapse textures suggesting that its vent sites may have been changed in the course of the eruption. On the third day the group spend long time to examine the Seoguipo formation. This formation is a complex volcanic and shallow marine siliciclastic succession. During the field discussion it became clear, that this formation document a significant time and numerous volcanic and non-volcanic events. Its older age suggests that phreatomagmatism in near-sea level commonly generated pyroclastic density currents that may entered the sea and/or fed volcaniclastic mass flows carrying volcanic clasts into the shallow marine basin surrounded the growing volcanoes. In the same day, a visit to the Yongmeori tuff ring presented a phreatomagmatic volcano, which pyroclastic sequences dominated by base surges. Discussions about the in situ versus post-depositional palagonitisation (Fig. 12) as well as the transportation mechanism of pyroclastic density currents were equally exiting. After the Yongmeori tuff ring the distal phreatomagmatic sequences of the Songaksan tuff ring were examined (Fig. 13). In this stage, a close view of the reworked volcanic debris (Hamori Formation) apron around the tuff ring was examined. On the fourth day a full day program was designed to study the Udo tuff cone pyroclastic units. The Udo tuff cone is one of the type locality from where the in situ remobilisation of accumulating phreatomagmatic tephra is documented (Sohn and Chough, 1993). In this site the grain flow and debris fall processes were discussed in detail (Fig.14).

Fig 10: Ilchulbong tuff cone preserved crater

Fig 11: Bomb and block-rick pyroclastic unit of the Suwolbong tuff ring

Fig 12: Palagonitisation rims around juvenile lapilli of the Yongmeori tuff ring

Fig 13: Plastered base surge beds of the distal pyroclastic units of the Songaksan tuff ring

Fig 14: Cored lapilli of the pyroclastic units of the Udo tuff cone

Beside the field visits of outcops already considered to be classical in the volcanology and sedimentology literature, the field workshop also provided a half-day oral presentation session and an evening poster presentation session (Fig. 15). In these fora the visiting scientists gave lectures and poster presentations from their field of expertise. These lectures were summarised in Korean language to facilitate the understanding of geological themes for large number of non-specialist government officials, educators and other interested parties invited to this meeting.

Fig 15: Lectures during the field workshop played and important role for exchange of ideas among workshop participants and the local audience

Among the presentations Prof Peter Kokelaar (University of Liverpool) provided an overview of Surtseyan volcanism, and highlighted the similarities in the sedimentary records of Surtsey to sites visited on Jeju Island. In a similar comparison style, Dr. Tom Pierson (USGS) summarised the USGS volcanic hazard programs, and highlighted the relevance of volcanic hazard programs in regions, not generally considered as an active volcanic area such as Jeju Island. Prof Dr Hans-Ulrich Schmincke (GEOMAR) provided two thematic lectures, one on a case in Nicaragua, where future phreatomagmatic and magmatic eruptions pose a grave threat to Managua City and environs, and another on the 969 AD eruption of Paektusan volcano located on the border between North Korea and China. This lecture provided an insight to the potentially large-scale volcanic hazards the Korean Peninsula may face from this volcano. Similar styles of eruption are also known from Holocene and earlier eruptions of the Korean Ulleung Island in the East Sea. Further presentations were made in the area of volcano-sedimentation and volcanic hazards by Dr. Shane Cronin (Massey University) on the 2007 AD lahars on Ruapehu in New Zealand, and Dr Shinji Takarada (Japan Geological Survey) on the 1991-95 Unzen block-and-ash flow and debris avalanche events. These provided a good background to the audience on various other types of volcanic processes were responsible in the formation of volcanic regions in Korea. A presentation by Dr Roberto Sulpizio (University of Bari) provided a spectacular experimental demonstration of the formation of pyroclastic density currents, similar to those that transported and deposited pyroclasts around phreatomagmatic volcanic vents visited during the field work.

In addition to the oral presentations numerous posters were presented to show to the audience the variety of related volcanology research worldwide, which is relevant to Korean volcanology. Posters from the Vanuatu volcanic arc and Idaho by Dr. Karoly Nemeth (Massey University) showed the diversity of mafic explosive eruption products similar to those of Jeju Island. A case study by Dr. Teresa Scolamacchia (UNAM) of the power and particle velocities within pyroclastic density currents highlighted the potential hazards and extreme violence of such events. Geomorphological changes and volcanic hazards of breakout floods after major volcanic eruptions were discussed by Dr Kyoko Kataoka (Niigata University), particularly relevant in the context of the earlier presentation on Paektusan. In similar way, Dr. Mari Sumita (GEOMAR) demonstrated the importance of understanding volcanic processes at the land – sea interface, where potentially hazardous pyroclastic flows may enter the sea. The poster session were completed by a selection of presentations by Prof Dr Young Kwan Sohn, Mr Jeong Gi Young and Dr Ki Hwa Park describing a wealth of research on the sub-surface structure, groundwater hydrology, as well as the variety of volcanic facies and processes associated with phreatomagmatism on Jeju Island.

The presentations served a very effective link to demonstrate that the volcanic processes studied on Jeju Island are highly relevant to global research in volcanic processes and hazards and external studies, in-turn, can be used to develop new levels of understanding at Jeju. Involving the local community, government officers and non-specialista in the workshop was an excellent chance to profile the importance of geological study and its input into planning and development on this highly populated island. This is also good agreement with the basic philosophy of the International Year of Planet Earth movement. The organisation and scientific backbone of the field workshop was provided by Prof Young Kwan Sohn and Dr Ki Hwa Park and they completed an excellent work. Many thanks for that. The field workshop field guide and abstract volume (Fig. 16) is available from Prof Dr Sohn upon email request (yksohn@gnu.ackr).

Fig 16: The field trip guide and abstract volume are available from the Prof Dr Sohn

Dr. Károly Németh, Dr Shane J. Cronin
Volcanic Risk Solutions, Institute of Natural Resources
Massey University
Palmerston North
New Zealand

References

Cheong, C.S., Choi, J.H., Sohn, Y.K., Kim, J.C. and Jeong, G.Y., 2007. Optical dating of hydromagmatic volcanoes on the southwestern coast of Jeju Island, Korea. Quaternary Geochronology, 2(1-4): 266-271.
Cheong, C.S., Choi, M.S., Khim, B.K., Sohn, Y.K. and Kwon, S.T., 2006. Th-230/U-234 dating of Holocene mollusk shells from Jeju Island, Korea, by multiple collectors inductively coupled plasma mass spectrometry. Geosciences Journal, 10(1): 67-74.
Chough, S.K. and Sohn, Y.K., 1990. Depositional mechanics and sequences of base surges, Songaksan tuff ring, Cheju Island, Korea. Sedimentology, 37: 1115-1135.
Sohn, Y.K. and Chough, S.K., 1989. Depositional processes of the Suwolbong Tuff Ring, Cheju Island (Korea). Sedimentology, 36(5): 837-855.
Sohn, Y.K. and Chough, S.K., 1992. The Ilchulbong tuff cone, Cheju Island, South-Korea - Depositional processes and evolution of an emergent, surtseyan- type tuff cone. Sedimentology, 39(4): 523-544.
Sohn, Y.K. and Chough, S.K., 1993. The Udo Tuff Cone, Cheju Island, South-Korea - Transformation of pyroclastic fall into debris fall and grain flow on a steep volcanic cone slope. Sedimentology, 40(4): 769-786.
Sohn, Y.K., Park, J.B., Khim, B.K., Park, K.H. and Koh, G.W., 2003. Stratigraphy, petrochemistry and Quaternary depositional record of the Songaksan tuff ring, Jeju Island, Korea. Journal of Volcanology and Geothermal Research, 119(1-4): 1-20.
Sohn, Y.K. and Park, K.H., 2004. Early-stage volcanism and sedimentation of Jeju island revealed by the Sagye Borehole, SW Jeju Island, Korea. Geosciences Journal, 8(1): 73-84.
Sohn, Y.K. and Park, K.H., 2005. Composite tuff ring/cone complexes in Jeju Island, Korea: possible consequences of substrate collapse and vent migration. Journal of Volcanology and Geothermal Research, 141(1-2): 157-175.
Won, J.H., Lee, J.Y., Kim, J.W. and Koh, G.W., 2006. Groundwater occurrence on Jeju Island, korea. Hydrogeology Journal, 14(4): 532-547.

Report on LASI II Workshop, Isle of Skye, UK

LASI II was an opportunity to discover how the study of high level magmatic systems has developed over the four years since the previous meeting. Supported by theGeological Society, the Volcanic and Magmatic Studies Group and theIAVCEI Commissions on Granites and Volcanogenic Sediments this meeting brought together workers in physical geology, igneous petrology, volcanology, structural geology, crustal mechanics and geophysics to discuss all aspects relating to the shallow emplacement of magma. A one day field trip to classic Palaeocene sill complexes of the Isle of Skye made the meeting more workshop-like.

Some selected presentations related to CVS interest

Thermal effects of magma emplacement and the origin of columnar jointing in host sandstone.J Adamovic�

Shallow intrusion of basaltic sills within volcaniclastic strata of the Sneis Formation, Faroe Islands Basalt Group, NE Atlantic.S.R. Passey, D.W. Jolley & B.R. Bell

High-level sill and dyke intrusions initiated from rapidly buried mafic lava flows within scoria cones of Tongoa, Vanuatu (New Hebrides), South Pacific.K. Németh & J.D.L. White

Peperites and soft sediment deformation textures of a shallow subaqueous Miocene rhyolitic cryptodome and dyke complex, Pálháza, Hungary . K. Németh, Z. Pécskay , U. Martin, K. Gméling, F. Molnár & S. Cronin

Coal peperite formation through the shallow intrusion of sills, Prestfjall Formation, Faroe Islands Basalt Group, NE Atlantic. S.R. Passey & B.R. Bell

Peperites? Invasive lava flows, shallow intrusions and their interaction with wet sediments.D.J. Brown & B.R. Bell

Modelling and classification of overpressure-driven vent structures in sedimentary basins.A. Rozhko, Y. Podlachikov, A. Malthe-Sørenssen, H. Svensen, S. Planke & F. Nicolaisen

Breccia pipes in the Karoo Basin: sediment-dolerite interactions and the consequences for the Toarcian greenhouse.H. Svensen, S. Planke, L. Chevallier, A. Malthe-Sørenssen, B. Jamtveit & F. Corfu

Magnetic characteristics of the Ság-hegy volcanic complex, little Hungerian Plain.N. Dworazik, A. Auer, U. Martin, K. Németh, H. de Wall & C. Rolf

Textural analysis of a Late Paleozoic coherent to pyroclastic dyke system near Burkersdorf (Erzgebirge, Saxony, Germany).C. Winter, C. Breitkreuz & M. Lapp

The extended abstract of the presentation are published inVisual Geosciences (Springer). Selected full papers will appear in aGeological Sociaely of London Special Volume in 2007

PASADO 2006 WORKSHOP RIO GALLEGOS, ARGENTINA

Report: Click here to download word file

2nd INTERNATIONAL MAAR CONFERENCE

September saw the completion of a very successful meeting devoted to the volcanology, structure, sedimentology, petrology, paleontology and physics of maars and diatremes, held in Germany, Hungary and Slovakia. Jointly sponsored by IAVCEI and IAS, the Second International Maar Conference brought together workers from 26 nations interested in how these volcanoes, second only to scoria cones in abundance on continents and islands, are supplied with magma, grow and fill. The wide-ranging scientific program also addressed how geophysical techniques can inform us about the deep structure of diatremes, how far ‘damage zones’ extend into country rock surrounding them, and better constrain the size and structure of maar-diatreme volcanoes hidden beneath sediment or vegetation. The detailed climatic record provided by sediments and fossils within maar lakes was another topic of interest.

The meeting ‘kicked-off’ in Wurzburg, Germany, for three days of ‘The Maar Engine – Workshop on Experimental Volcanic Molten Fuel-Coolant Interactions’. For many of us, this was our first chance to see the experimental equipment employed in the wide range of physical modeling of explosive magma-water interaction and materials science that has contributed so much to our understanding of volcanic processes in the past three decades. Bernd Zimanowski, Ralf Büttner and graduate students in the research group led a tour of the Wurzburg experimental lab, of which the range of high-speed camera equipment plus the reinforcing of the power system and the building were most impressive – when an explosion is triggered the whole department shakes on its foundations! Bernd led a discussion of the physics of fuel-coolant interactions, supported by summaries of transport and sedimentation within phreatomagmatic systems (Pierfrancesco Dellino) and the volcanology of maar-diatreme volcanoes (Volker Lorenz). Unfortunately Ken Wohletz was unable to attend this meeting; his contributions to the workshop and subsequent discussions were missed. As is always the case, the workshop threw up as many new questions as it answered, and many new lines of inquiry were identified that can extend the fuel-coolant model to a wider range of magma types and magma-water contact conditions, plus build on the work done that matches clast morphologies formed under known conditions with those formed during natural explosions to expand our arsenal of diagnostic tools for reconstructing eruption histories. The transport of debris from explosion sites, often deep within vents, to the surface, the impact of discrete explosions on transport and deposition systems, and the range of fragmentation mechanisms that might act on clasts and country rock during and subsequent to transport away from explosion sites were all hot topics.

Two field trips complemented the conference schedule (with the same trip run both pre- and post-meeting to allow people to join both); one trip, led by Ulrike Martin & Károly Németh, visited the Mio/Pliocene maars and diatremes of western Hungary, while the other, led by Jaroslav Lexa and Vlastimil Konec�ny´, toured the Mio/Pleistocene southern Slovakian maar-diatreme field. Both fieldtrips were well attended and provided a great opportunity to see some countryside, admire the local geology and discuss the rocks and processes on the outcrop. Many eroded diatreme structures form the highest-standing part of the landscape and are the sites of castles or fortifications, which lends a touch of history and drama to the outcrops. The outcrops are often in quarries, some still active, and intra-vent structures, maar lake sedimentology, tephra rings and the margins of lava lakes are beautifully exposed. The work during the Hungarian field trip was leavened by visits to vineyards and restaurants that doubled as a chance to experience Hungarian culture, and is an aspect that will remain at least as memorable as the geology for most of the participants.

The conference itself convened in a rural setting outside Budapest, and comprised four days of oral and poster sessions that encompassed the whole range of current research into maar-diatreme volcanoes. An organizational point appreciated by many people was that all sessions ran consecutively, meaning that we could all attend all the sessions – for a conference of this size (about 120 participants) this is a great way to ensure everyone has a chance to enjoy the full breadth of the science. Hans-Ulrich Schmincke started the conference with his plenary talk ‘External Forcing of Volcanic Eruptions’, which unified many of the advances in volcano science in the past three decades to illustrate how the ‘big picture’ is developing. While it is rewarding to note that some of the feedbacks involved are now approaching a state of adequate description, those that still require detailed work before we can begin to accurately model the long and short term behaviour of volcanoes will continue to offer stimulating and challenging research questions for some time to come.
Early sessions covered the geology and volcanology of maars and their associated tephra deposits, discussions of diatremes and their root zones, and the structural and economic geology of maar-diatreme volcanoes and their root zones. The latter was bolstered by participation of workers interested in the geology of kimberlite pipes, description of which were beautifully illustrated by a wealth of drillcore data and sophisticated (and well-constrained) computer models of diatreme geometry. Later sessions discussed the geology of intrusive and extrusive rocks associated with maar volcanoes, geophysical contributions to mapping and modeling their shallow and deep structure, and some new models for fragmentation and sedimentation of fine ash within eruption columns. Presentations concerned with limnology and sedimentology of maar lakes, surtseyan volcanism, volcanic fields and polygenetic volcanoes rounded out the scientific program. An interesting addition to the conference was a discussion of how our work is important to the public, covering hazards, environmental protection, new approaches to geoscience education and the creation of geoparks to preserve significant geological features. Hungary and Germany have both seen the establishment of new geoparks in the past decade, and we were offered many suggestions as to how best to promote earth science and volcanology through the geoparks concept – with the caveat that if we do nothing to assist with informing the public, then we are bound to accept whatever alternative information is offered as representative of current thinking in volcanology!

The conference came to an end with presentation of student awards, and the suggestion that we should reconvene in Mexico in 2009 for the next Maar Conference. The gala dinner was preceded by a display of traditional horse-riding skills and accompanied by gypsy music and plenty of Hungarian wine, and provided a great wrap-up for a fantastic meeting. On behalf of the participants, I would like to extend our thanks for the organizing committee for putting together a great conference of truly international scope and attendance, that provides both a benchmark for our current understanding of maar-diatremes and a springboard for future work on these interesting volcanoes.

M. McClintock, U. Otago, Dunedin, New Zealand

APRIL 2004

Open Forum: Research in the Upper Crust - Sedimentary Geology

Friday, April 16, 2004
(8:30 am - 6:00 pm)
Parisian Room, Fairmont Hotel
Dallas, Texas

Who should attend?
Anyone with a stake in the future of sedimentary geology: Academic,
Industry and Government Researchers, Technology Consultants, and Students at
all levels

For more information: hharper@sepm.org or
http://www.nced.umn.edu/Sedimentology_Stratigraphy_Initiative.html

Presentations

Introduction and Charge
The current perception of "Sedimentary Geology" as a science and how the
sedimentary geology community needs to communicate its own perception.
a.. How is Sedimentary Geology viewed by funding agencies and why?b.. Are there differences between basic and applied research?

Grand Challenge Problems in Sedimentary Geology
a.. Conclusions from previous workshops that looked at the science
b.. What is the role of Sedimentary Geology in cutting edge science?
c.. What are the challenges for the current and next generation of
sedimentary geology research?

Infrastructure Status and Needs
Current projects in infrastructure and an overview of data (existing,
available, new)
a.. Cyberinfrastructure - multiple projects and goals - same networks and
tools
b.. Synthesis centers
c.. Data - where is it, how can you get it
d.. Data - old and do I need any new
e.. Data within industry - seismic, core, more.

Overview of Current Complementary Programs
Existing programs and projects within the upper crust arena
a.. Who is doing what now
b.. Can or should they all be linked

Break Out Group Discussions
Small groups meet and discuss the information and ideas shown to determine
practical next steps in determining and communicating this community's
perception of its science

Presentation of Group Ideas
Whole group discussion of breakout group presentations

Next Steps
Discussion and selection of "best" next steps and selection of a synthesis
committee for production of a summary report from the workshop.

MAY 2004

Gsa Joint Meeting Rocky Mountain Section (56th) And Cordilleran Section (100th)

May 3-5, Boise, Idaho
Web site at www.earth.boisestate.edu/GSA2004/gsa2004.htm.
Products and Processes of Hydrovolcanism
Craig White, Boise State University, (208) 426-3633; Martha Godchaux, (208) 882-9062.

JUNE 2004

International Commission For Earth Sciences In Africa (icesa)
The East African Rift System: Development, Evolution And Resources

Addis Ababa, Ethiopia 20 - 24 June 2004
http://www.gl.rhul.ac.uk/ear_conference
Session 1: Geodynamic models of rifting and magmatism
Session 3: Tectonics and Denudation
Session 4: Magmatism (Volcanology, Petrology and Geochemistry)
Session 5: Sedimentary processes
Session 8: Geohazards
Regular registration (payment deadline March 30, 2004):

Sediment 2004 2nd Sepm-ces Meeting

June 2-4, 2004, Germany (Aachen)
Contact: Nicole Jennisen
Geologisches Institut der RWTH Aachen
Wüllnerstrasse 2
D-52062 Aachen
Germany
Tel.: +49 241 80 95739
Fax: +49 241 80 92151
Email sediment2004@geol.rwth-aachen.de
Web-page: http://www.sediment2004.rwth-aachen.de

AUGUST 2004

2004 Western Pacific Geophysics Meeting

16-20 August 2004
(Monday-Friday), Honolulu, Hawaii
Honolulu, Hawaii, U.S.A.
Sponsor: AGU
Contact: AGU Meetings Department, 2000 Florida Avenue, NW,
Washington, DC 20009 USA ; Phone: +1-202-777-7333; Fax:+1-202-328-0566;
Email meetingsinfo@agu.org ; Web Site: www.agu.org/meetings/wp04/

32nd International Geological Congress

August 20-28, 2004, Florence, Italy
Contact:
Chiara Manetti
Dipartimento di Scienze della Terra
Via La Pira, 4
50121 Firenze
Italy
Phone/Fax: + 39 055 2382146
email: casaitalia@geo.unifi.it Web-page: www.32igc.org

SEPTEMBER 2004

Ias 2004 23rd Meeting

15-17 September 2004,
Coimbra, Portugal
For further details please visit www.uc.pt/ias
Contact:
Rui Pena dos Reis Universidade de Coimbra Dpto. Ci_ncias da Terra
Largo Marqu_s de Pombal 3014 Coimbra (PORTUGAL)
Email penareis@ci.uc.pt

Iavcei – Ias 2nd International Maar Conference

15 – 29 September 2004,
Kecskemet (Lajosmizse), Hungary
For further details please visit www.mafi.hu
Contact:
Ulrike Martin ( ulrike.martin@geo.tu-freiberg.de)
Karoly Nemeth ( nemeth_karoly@hotmail.com)

OCTOBER 2004

Geological Society Of London William Smith Meeting 2004 - Earth's Dynamic Surface: Catastrophe And Continuity In Landscape Evolution

Burlington House 4 - 5 October 2004
The abstract deadline for presentations and posters is February 28th 2004
Those interested in contributing to this meeting should directly contact
Kerry Gallagher ( kerry@imperial.ac.uk ).
For further details contact: Lydia Dumont
Address: Burlington House, Piccadilly, London W1J 0BG
Tel: + 44 (0) 207 434 9944
Fax: + 44 (0) 207 494 0579
Email lydia.dumont@geolsoc.org.uk
Web: http://www.geolsoc.org.uk

NOVEMBER 2004

IAVCEI General Assembly

Volcanism and its Impact on Society
2004 – Pucon, Chile
November 14 – 19
Homepage: http://www2.sernageomin.cl/iavcei/
Circular ( pdf – 2.54 Mb)
Registration Form ( pdf – 201 Kb)

Contact information

For any questions concerning scientific aspects of the IAVCEI General Assembly Pucón 2004, please contact the Organising Committee at:

IAVCEI 2004 General Assembly Secretariat: Fax: 56-2-777 19 06
Av. Santa María 0104-Providencia Phone: 56-2-737 50 50
Santiago Email iavcei@sernageomin.cl
CHILE

The Organising Committee is being officially assisted by Turismo Tajamar, a well-known Chilean Travel
Agency which is the company responsible for all the bookings and logistic arrangements of the
meeting. All enquiries regarding registration, payments, hotel booking, field trips registration, must
be made directly to Turismo Tajamar at the following address:
Congress coordinator: Ms. Luisa F. Martínez ( lmartinez@tajamar.cl) Phone: (56-2) 336 81 65
Congress secretariat: Ms. Marianela Poblete ( marianela@tajamar.cl) Phone: (56-2) 336 81 50
Hotel & Field trips coordinator: Ms. Pilar Lorca ( plorca@tajamar.cl) Phone: (56-2) 336 81 62
Hotel & Field trips assistant: Ms. Paulina Yuric ( pyuric@tajamar.cl) Phone: (56-2) 336 81 63
Fax: (56-2) 233 29 96
Address : Orrego Luco 023 – Providencia – Santiago de Chile

DECEMBER 2004

2004 Fall Meeting - 13-17 December 2004

San Francisco, California, U.S.A.
Sponsor: AGU
Contact: E. Terry , AGU Meetings Department, 2000 Florida
Avenue NW,Washington, DC 20009 USA ; Phone: +1-202-777-7335; Fax:
+1-202-328-0566; Email eterry@agu.org ; meetinginfo@agu.org ;
Web Site: www.agu.org/meetings

GSA Penrose Conference Puebla - word file (not available)

Claus Siebe gives an explanation of volcano collapse and rign plain development around the Popocatepetl Volcano, Puebla, Mexico

Jig saw fit structures of a volcanic debris avalanche hummock on the Popocatepetl ring plain, Puebla, Mexico

Overview of the Popocatepetl volcano from Cholula, Puebla, Mexico

Close up view to the summit of Popocatepetl from around 4000 m elevation

Aztec pyramid(s) burried under ring plain deposits in Cholula, about 35 km from the Volcan Popocatepetl, Puebla, Mexico

Participant of the Penrose Conference field trip to Popocatepetl strugeling with weak air around 4000 m elevation. In the background the Volcan Iztaccíhuatl (5272 m) is visible.

GEO 2003 Bochum meeting - word file (not available)

22nd IAS - word file (not available)

Report on IUGG Sapporo Meeting

http://www.jamstec.go.jp/jamstec-e/iugg/

( word document)

Phreatic explosion crater as a result of the Usu (Hokkaido), Japan 2000 eruption

Fall out tephra succession on the Tarumai (Hokkaido), Japan

Subaqueous volcanogenic mass flow deposits on the Shakotan Peninsula (Hokkaido), Japan

Volcano-Ice Interaction Meeting (August 13-15, Reykjavik, Iceland)

Volcano-Ice interaction on Earth and Mars was explored in the first international conference, which was held at the University of Iceland in Reykjavik. Significant advances in both terrestrial and extraterrestrial study of this phenomena have been made in recent years. Subglacial eruptions in Iceland in 1996 and 1998, and the

Fig. 2 A basaltic ridge erupted sub/englacially, Jarlhrettur, Iceland (photo by Ian Skilling)

possibility that similar sub ice eruptions may have occurred on Mars, ensured that the meeting was particularly topical. The conference brought together 76 scientists, including geologists, geophysicists and glaciologists from 10 countries. There was much to interest volcanologists and volcanogenic sedimentologists, including detailed accounts of the lithofacies of basaltic, trachytic and rhyolitic subglacial volcanoes, and studies of associated catastrophic flood deposits (j�kulhlaup deposits). Basaltic subglacial volcanism generates a wide variety of landforms, comprising pillow lavas, hydrovolcanic tephra, subaerial lavas and their resedimented equivalents. Such landforms include ridge-like edifices constructed from fissure-fed eruptions (Fig. 2) and flat-topped mountains known as tuyas, which are capped by subaerial lavas. Such features are widely exposed in Iceland, Antarctica and British Columbia. A fabulous 3-day field trip followeds the meeting, and concentrated on hydrovolcanic and j�kulhlaup deposits. Fabulous weather also allowed superb views of the same areas during a 2 hour overflight. Look out in EOS for a detailed report of this meeting, and for a Geological Society of London Special Publication of papers presented at the meeting, which is to be edited by John Smellie. Details of the meeting are also still available on the web at:

http://wwwflag.wr.usgs.gov/USGSFlag/Land/IcelandMeeting/icelandmeeting.html

Ian Skilling

Dept of Geology

University of Southern Mississippi

Hattiesburg

MS-39406

USA

International Maar Conference (Daun, Germany, August 20-23, 2000)

The second-most common subaerial volcanic landform on Earth, maar volcanoes were first recognized in the Eifel region of Germany, just west of the Rhine River, in the early 1800s. The firstInternational Maar Conference was organized this year to take place in Daun, Germany in the middle of the Eifel volcanic region. The purpose of the conference was to bring together international experts associated with research on maar volcanoes, their architecture, formation, sediments, paleontology, and hydrogeology.

The conference included 80 presentations that spanned a wide range of earth-science disciplines; the sessions were divided mainly into issues of the architecture of maar volcanoes, eruption phenomena, and sedimentological records in maar craters. Those of us in volcanology are familiar with most of the literature on maar formation, architecture and deposits and the hydrothermal systems that are commonly associated with hydrovolcanic activity. What was fairly new to us was the value of maars for studying climatological and ecological change; sediments in maar lakes are deposited within relatively closed systems. Another application is the use of maars and the fractured country rock surrounding them as isolated aquifers; maar volcanoes are important sources of potable water within the Eifel region.

An important part of the conference were the four field trips that were led before and after the symposia. Maar volcanoes were first described in the Eifel region in 1816; they are still a remarkable collection of volcanoes and must be seen in the field.

Residents of villages in the Eifel region are very much aware of their volcanic heritage. We visited volcano museums in Daun (Vulkanmuseum Daun), Manderscheid (Maarmuseum Manderscheid), Gerolstein (Naturkundmuseum), and Strohn (a small museum is being constructed). This awareness of volcanism plus remarkable hospitality in all of these villages made the educational and social aspects of the conference one of the highlights.

If you are interested in maars and hydrovolcanism, it is imperative that you purchase the 549 page proceedings and the field trip guidebook (cited below). There is a lot of new material in these volumes, along with a number of review papers.

Superb organization, an enthusiastic group of attendees, and great geology-what a way to spend a few weeks in Germany!

Conference Publications:

Jacoby, W., Lorenz V., Negendank, J., Neuffer, F.-O., and B�chel, G. (eds), 2000.International Maar Conference, Terra Nostra 2000/6, 549 pp. (In German and English). (Publisher: Alfred-Wegener-Stiftung, Arno-Holz-Stra�e 14, D-12165 Berlin, Germany; Tel: 49-30-790-1374-0; email: info@aw-stiftung.de)

Neuffer, F.-O. and Lutz, H. (eds), 2000. Field Trip Guidebook (Exkursionsf�hrer), International Maar Conference (Internationale Maar-Tagung). Mainzer Naturwissenschaftliches Archiv, Beiheft 24, 160 pp. (In German and English). (Publisher: Naturhistorisches Museum Mainz, Reichklarastr. 10, D-55116 Mainz, Germany; Ph: 49-6131 122646; email: Isnhmmz@mail.uni-mainz.de)

Grant Heiken and Kenneth Wohletz
Earth and Environmental Sciences Division
Los Alamos National Laboratory, Los Alamos, NM 87544 USA

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