File:Geology of the Richmond Basin 1899 Plate XXXIX.jpg

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Captions

Westward-dipping Newark sandstones and shales

Summary[edit]

Description
English: Plate XXXIXV from The Geology of the Richmond Basin published by USGS, which has the following caption:
Westward-dipping Newark sandstones and shales, showing cross bedding and small faults, Southern Railway cut at Dry Bridge. Looking north.
The text of the report refers to the figure as follows:
The amount of throw on this fault is indeterminable, but is probably small, as the beds are not dissimilar on the opposite sides of the plane of rupture. The attitudes of the beds on the sides of the break are, however, diverse, as is indicated in the diagram. The direction of the fault, as nearly as it could be ascertained from the limited exposure, is west of north, the strike of the tilted strata being N. 13° W. The extension of this fault would carry the dislocation into the Cornwallis Hill fault block on the western margin. Its extension in the opposite direction would intersect the strata in the Dry Bridge railroad cut (see Pl. XXXIX). A small fault observed there west of the road bridge shows that this is a line of disturbance. Another small fault may be detected in the roadside on the western slope of High Hill, in Powhatan County (see fig 105, p. 477).
Date
Source Nathaniel Southgate Shaler and Jay Backus Woodworth, 1899. Geology of the Richmond Basin, Virginia. U.S. Government Printing Office. United States Geological Survey.
Author USGS

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Public domain
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