Traces of Fallback Breccia on the Rim of Barringer Meteorite Crater (a.k.a. Meteor Crater), Arizona

Erickson, Timmons M ; Kring, D A ; Angotti, L ; Bouchard, M ; Byron, B ; Chinchalkar, N ; De Graaff, S ; Dehais, T ; Glaspie, L ; Hedgepeth, J(University of Western Ontario, London, Ontario, Canada)

关键词: ALLUVIUM;    CRATERS;    GEOLOGY;    METEORITE CRATERS;    SURGES;    DEBRIS;    EROSION;    BRECCIA;    ASTRONOMY;   

RP-ID  :  JSC-E-DAA-TN64830

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来源: NASA Technical Reports Server

【 摘 要 】

Barringer Meteorite Crater (a.k.a. Meteor Crater), Arizona, is one of the youngest and best preserved impact craters on Earth. For that rea-son, it provides a baseline for similar craters formed in the geologic past, formed elsewhere in the Solar Sys-tem, and illuminates the astronomical and geological processes that produce them. The crater has not, how-ever, escaped erosion completely. While Shoemaker [1] mapped a breccia with fallback components inside the crater, he did not locate it beyond the crater rim. He only found remnants of that type of debris in re-worked alluvium [1; see also 2]. Fallback breccia and any base-surge deposits have, thus, been missing components in studies of material ejected beyond the transient crater rim.