A shallow seismic refraction study of the Versailles cryptoexplosion structure, central Kentucky
作者:
James B. Harris,
Daniel R. Jones,
R. L. Street,
期刊:
Meteoritics
(WILEY Available online 1991)
卷期:
Volume 26,
issue 1
页码: 47-53
ISSN:0026-1114
年代: 1991
DOI:10.1111/j.1945-5100.1991.tb01014.x
出版商: Blackwell Publishing Ltd
数据来源: WILEY
摘要:
Abstract—The Versailles cryptoexplosion structure, located in central Kentucky, contains a partially brecciated central uplift and a boundary marked by arcuate faulting. Seismic refraction data were used to divide the structure into distinct units on the basis of velocity. A zone of brecciated material shows a decrease in velocity compared with surrounding rocks. Locally thickened strata are present on the flanks of the central uplift. An increase of the bedrock velocity in the area surrounding the structure suggests localized dolomization of fractured bedrock, and a plug of fractured strata near the base of the brecciation appears to be uplifted. Based on the geometry of deformation seen in known impact structures, and the integration of this study with previous geological and geophysical work in the area, it is suggested that our results support the interpretation of the Versailles structure as an eroded astrobleme (Black, 1964b; Seeger, 1972
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