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

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Captions

Captions

Tilted sandstones and shales in the Union pits area

Summary

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Description
English: Plate XLI from The Geology of the Richmond Basin published by USGS, which has the following caption:
Tilted sandstones and shales in the Union pits area. Looking north. A 4-inch layer of coal is exposed near the hammer.
The text of the report refers to the figure as follows:
East of the main basin at Midlothian and south of the turnpike are two outliers of the coal measures well known in the mining history of this district. The eastern one is traversed by Falling Creek. Its north and south length is probably half a mile, but its southern limits are hidden in the alluvium of the creek. In this area are the Union pits. The view shown in Pl. XLI was taken looking north, on the east side of Falling Creek, showing the sandstone and coal-bearing shales below the main coal seams. The shales decompose and run down over the outcrop, forming a mud crust upon them. The steep westerly dip is much higher than is the general rule along the eastern margin. A seam of coal about 4 inches thick is exposed near the point indicated on the picture by the geological hammer.
A shallow pit sunk through the sandstones a few yards south of the first locality revealed a fault striking east and west and dipping about 30° south. Such cross-faults probably also occur at the ends of these small basins (see Pl. XLII).
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

Licensing

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Public domain
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