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Effects of the Chesapeake Bay Impact Crater on the Geologic Framework and the Correlation of Hydrogeologic Units of Southeastern Virginia, South of the James River. Professional Paper 1622.

机译：切萨皮克湾冲击陨石坑对詹姆斯河以南弗吉尼亚州东南部地质构造及水文地质单元的影响。专业论文1622。

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About 35 million years ago, a large comet or meteor slammed into the shallow shelf on the western margin of the Atlantic Ocean, creating the Chesapeake Bay impact crater (CBIC). Virginia Coastal Plain sediments, the southern part of the Chesapeake Bay, and a small part of the Atlantic Ocean now cover the crater. The impact apparently affected pre-impact structures near the CBIC. Subsequent structural adjustments of these structures likely were influenced by the crater and by the regional post-rift stress regime typical of the passive margin scenario described for the Atlantic Coastal Plain. Structural adjustments disrupted pre-impact sediments and basement rocks in the southern Chesapeake Bay region and influenced subsequent deposition, erosion, and preservation of sediments. Correlations of litho- and biostratigraphic data from borehole cores and cuttings and geophysical logs were used to identify the location and geometry of the CBIC and possible pre-impact structures. This report focuses on the Virginia Coastal Plain south of the James River and complements a recent study of the CBIC's effects on the geologic framework beneath the lower York-James Peninsula.

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Powars, D. S.;
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年度 2000
页码 1-61
总页数 61
原文格式 PDF
正文语种 eng
中图分类工业技术;
关键词
Geology; Craters; Hydrogeology; Chesapeake Bay; Virginia; Lithology; Rocks; Sediments; Stratigraphy; Correlations; Boreholes; Atlantic Ocean; Impact melts; Water resources; Maps; James River;

机译：地质;陨石坑;水文地质;切萨皮克湾;弗吉尼亚;岩性;岩石;沉积物;地层学;相关性;钻孔;大西洋;冲击融化;水资源;地图;詹姆斯河;

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6. Effects of the Chesapeake Bay Impact Crater on the Geologic Framework and the Correlation of Hydrogeologic Units of Southeastern Virginia, South of the James River. [R] . Powars, D. S. 2000

机译：切萨皮克湾冲击陨石坑对詹姆斯河以南弗吉尼亚州东南部地质构造及水文地质单元的影响。

Effects of the Chesapeake Bay Impact Crater on the Geologic Framework and the Correlation of Hydrogeologic Units of Southeastern Virginia, South of the James River. Professional Paper 1622.

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