|5 November 2012
GSA Release No. 12-90
Director - GSA Communications & Marketing
El'gygytgyn crater lake.
Image from NASA.
Pits, Craters, Hollows, Blast Winds, and Spherules — On Earth and Beyond
GSA Annual Meeting & Exposition, Charlotte, North Carolina, USA, 4–7 November 2012
Boulder, CO, USA – Impact cratering is an intense subject of much discussion in the fields of geoscience, geophysics, and planetary science. Fascinating examples include the El’gygytgyn impact structure in the Russian Arctic; pits and hollows on Mercury; the cratering history on Vesta, one of the largest asteroids in the solar system; and possible evidence for far-reaching, intense impact blast winds on Mars.
Session organizers Christian Koeberl of the University of Vienna and Jeffrey Plescia of Johns Hopkins University have brought together fourteen papers covering these topics and more.
Session 225: T158. Impact Cratering in the Solar System: Processes and Products
When: Wednesday, 7 Nov., 8 a.m. to noon
Where: Charlotte Convention Center, Room 213A
Online at: https://gsa.confex.com/gsa/2012AM/webprogram/Session30955.html
Presentations (in chronological order)
• Impact chemistry: A new frontier in shock physics, by Jay Melosh of Purdue University
• The cratering history of Vesta, by David P. O’Brien of the Planetary Science Institute and colleagues
• Morphology of pit craters and hollows on Mercury, by Jeffrey J. Gillis-Davis of the Hawaii Institute of Geophysics and Planetology
• Impact blast winds: Origin of certain permanent wind streaks on Mars, by Peter H. Schultz of Brown University
• Asymmetric lunar craters—Impacts on sloping surfaces, by Jeffrey Plescia of Johns Hopkins University
• High spatial resolution geochemistry of K-PG impact spherules, by Joke Belza of Vrije Universiteit Brussel and colleagues
• Reevaluation of siderophile element abundances and ratios across the Cretaceous-Paleogene (K-PG) boundary: Implications for the nature of the projectile, by Steven Goderis of Vrije Universiteit Brussel and colleagues
• Numerical and hydrogeophysical model of Mount Toondina impact crater, South Australia, by Todd Halihan of Oklahoma State University
• The El'gygytgyn impact structure, Russian Arctic: An achondritic impactor? by Christian Koeberl of the University of Vienna and colleagues
• Impact glasses and impact melt breccia from the El'gygytgyn structure, Chukotka, Russia, by Lidia Pittarello of the University of Vienna
• Detrital shocked zircons eroded from the 1.85 Ga Sudbury impact structure in modern fluvial and glacial sand deposits, by Olivia Thomson of the University of Puerto Rico and colleagues
• Alamo seismite styles: Proximal to distal across 150 km, by John E. Warme of the Colorado School of Mines and colleague Jesus A. Pinto
• Quantitative stratigraphic modeling of the Late Devonian Alamo impact, Eastern Nevada, by Joseph W. Sheffield of ESRI and colleague Leif Tapanila
• Possible effects of sediment transport upon the decay of an impact produced tsunami, by Andrew Schedl of West Virginia State University
Find out what else is new and newsworthy by browsing the complete technical program schedule at https://gsa.confex.com/gsa/2012AM/finalprogram/.
To identify presentations in specific areas of interest, search topical sessions by discipline categories or sponsors using the drop-down menus at www.geosociety.org/meetings/2012/sessions/topical.asp, or use your browser's "find" feature to search for keywords or convener names.
Representatives of the media and public information officers from universities, government agencies, and research institutions, may participate in technical sessions, field trips, and other special events. Eligible media personnel will receive complimentary registration and are invited to use GSA's newsroom facilities while at the meeting. Journalists and PIOs must pay for any short courses or field trips in which they wish to participate.
For information on media eligibility, go to www.geosociety.org/meetings/2012/media.htm. Media personnel may register onsite in the GSA Newsroom (room 204) at the Charlotte Convention Center. Wireless Internet access and a quiet space for interviews will be provided in the newsroom, along with beverages and light snacks throughout the day.
• Tuesday, 6 Nov., 7:30 a.m. to 6 p.m.
• Wednesday, 7 Nov., 7:30 a.m. to 5:30 p.m.
Newsroom telephone number (incoming calls): +1-704-339-6207
Contact Christa Stratton, GSA Director of Communications & Marketing, for additional information and assistance.