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Large meteorite impacts III
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SYSNO ASEP 0029461 Document Type M - Monograph Chapter R&D Document Type Monograph Chapter Title Chicxulub impact ejecta deposits in southern Quintana Roo, Mexico, and central Belize Title Kráter Chisxulubu v jižním Quintana Roo, Mexiko a střední Belize Author(s) Pope, K. O. (US)
Ocampo, A. (US)
Fischer, A. G. (US)
Vega, F. J. (MX)
Ames, D. E. (CA)
King, D. T. Jr. (US)
Fouke, B. W. (US)
Wachtman, R. J. (US)
Kletetschka, Günther (GLU-S) RID, SAI, ORCIDSource Title Large meteorite impacts III. - Colo : Geological Society of America; Boulder, 2005 / Kenkmann T. ; Horz F. ; Deutsch A. - ISSN 0072-1077 - ISBN 0-8137-2384-1 Pages s. 171-190 Number of pages 20 s. Language eng - English Country US - United States Keywords Chicxulubu crater ; impact ejecta ; Mexico ; Belize Subject RIV BM - Solid Matter Physics ; Magnetism CEZ AV0Z30130516 - GLU-S (2005-2011) Annotation A single ejecta exposure was discovered near Armenia in central Belize, 470 km from Chicxulub. The Albion Formation is composed of two lithostratigraphic units: the spheroid bed and diamictite bed, originally identified at Albion Island, Belize. Ejecta are emplaced in large terrestrial impacts by at least two distinct flows: (1) an initial fl ow involving a volatile-rich cloud of fi ne debris similar to a volcanic pyroclastic fl ow, which extends >4.7 crater radii (the spheroid bed), and (2) a later fl ow of coarse debris that may not extend much beyond 3.6 crater radii (the diamictite bed). The former deposit we attribute to material entrained in the impact vapor plume, and the latter to the turbulent collapse of the ejecta curtain. Workplace Institute of Geology Contact Jana Popelková, popelkova@gli.cas.cz, Sabina Janíčková, Tel.: 233 087 272 Year of Publishing 2006
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