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GRACE Gravity Data Target Possible Mega-impact in North Central Wilkes Land, AntarcticaA prominent positive GRACE satellite-measured free-air gravity anomaly over regionally depressed subglacial topography may identify a mascon centered on (70 deg S, 120 deg E) between the Gamburtsev and Transantarctic Mountains of East Antarctica. Being more than twice the size of the Chicxulub crater, the inferred Wilkes Land impact crater is a strong candidate for a Gondwana source of the greatest extinction of life at the end of the Permian. Its ring structure intersects the coastline and thus may have strongly influenced the Cenozoic rifting of East Antarctica from Australia that resulted in the enigmatic lack of crustal thinning on the conjugate Australian block.
Document ID
20050180397
Document Type
Preprint (Draft being sent to journal)
Authors
vonFrese, Ralph R. B. (Ohio State Univ. Columbus, OH, United States)
Wells, Stuart B. (Ohio State Univ. Columbus, OH, United States)
Potts. Laramie V. (Ohio State Univ. Columbus, OH, United States)
Gaya-Pique, Luis R. (Istituto Nazionale di Geofisica Rome, Italy)
Golynsky, Alexander V. (VNIIOkeangeologia Saint Petersburg, Russia)
Hernandez, Orlando (Universidad Nacional de Colombia Bogota, Colombia)
Kim, Jeong Woo (Sejong Univ. Seoul, Korea, Republic of)
Kim, Hyung Rae (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Hwang, Jong Sun (Yonsei Univ. Seoul, Korea, Republic of)
Taylor, Patrick T. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 2005
Subject Category
Geophysics
Distribution Limits
Public
Copyright
Public Use Permitted.

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