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SAVONOSKI CRATER, ALASKA: A POSSIBLE METEORITE IMPACT STRUCTURE
Author(s) -
French Bevan M.,
Muller Ernest H.,
Ward Peter L.
Publication year - 1972
Publication title -
meteoritics
Language(s) - English
Resource type - Journals
eISSN - 1945-5100
pISSN - 0026-1114
DOI - 10.1111/j.1945-5100.1972.tb00430.x
Subject(s) - impact crater , geology , meteorite , petrography , ejecta , glacial period , volcano , shock metamorphism , ridge , basalt , paleontology , geochemistry , metamorphic rock , geomorphology , astrobiology , physics , quantum mechanics , supernova
Savonoski Crater, a small basin about 1700 feet in diameter, is located on a ridge of gently‐dipping Jurassic sandstone in Katmai National Monument, southwestern Alaska. Reconnaisance geological, geophysical, and petrographic studies suggest that it was formed either by volcanic processes or meteorite impact prior to the end of the latest glaciation in the region. Surface ejecta, if originally present, apparently have been removed by glaciation. No distinctive shock‐metamorphic effects were observed in the few rock specimens collected. Final determination of the crater's origin will require more extensive field studies or drilling in the center of the crater.