A Possible Tektite Strewn Field in the Argentinian Pampa

Impact glass associated with 11 elongate depressions in the Pampean Plain of Argentina, north of the city of Rio Cuarto, was suggested to be proximal ejecta related to a highly oblique impact event. We have identified about 400 additional elongate features in the area that indicate an aeolian, rathe...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 2002-05, Vol.296 (5570), p.1109-1111
Main Authors: Bland, P. A., C. R. de Souza Filho, Jull, A. J. T., Kelley, S. P., Hough, R. M., Artemieva, N. A., Pierazzo, E., Coniglio, J., Pinotti, L., Evers, V., Kearsley, A. T.
Format: Article
Language:English
Subjects:
Asteroids
Collisions
Discovery and exploration
Dune blowouts
Ejecta
Geology
Glass
Impact craters
Loess
Meteorites
Pampas
Regions
Scientific Concepts
Soil samples
Tektite
Tektites
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Summary:Impact glass associated with 11 elongate depressions in the Pampean Plain of Argentina, north of the city of Rio Cuarto, was suggested to be proximal ejecta related to a highly oblique impact event. We have identified about 400 additional elongate features in the area that indicate an aeolian, rather than an impact, origin. We have also dated fragments of glass found at the Río Cuarto depressions; the age is similar to that of glass recovered 800 kilometers to the southeast. This material may be tektite glass from an impact event around 0.48 million years ago, representing a new tektite strewn field.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.1068345