Atlas 177c
	Geology and mineral resources of the Womelsdorf quadrangle (Lancaster, Lebanon, and Berks Counties) by Geyer, A. R., Buckwalter, T. V., McLaughlin, D. B., and Gray, Carlyle 1963
Suggested Citation:	Geyer, A. R., Buckwalter, T. V., McLaughlin, D. B., and Gray, Carlyle, 1963, Geology and mineral resources of the Womelsdorf quadrangle: Pennsylvania Geological Survey, 4th ser., Atlas 177c, 96 p. [Available online.]
Description:	This report is on the Womelsdorf 7.5-minute quadrangle, an area that intersects three physiographic provinces in southeastern Pennsylvania. The dominate surface feature, South Mountain, occurs in the east-central part of the quadrangle and represents the westernmost part of the Reading Prong section of the New England province. It is underlain by Precambrian gneisses that have been intruded by granites and closely related rocks. The quartz-pebble conglomerates of the Cambrian Hardyston Formation form ridges on the north and west borders of the mountain. North and west of the mountain is the limestone valley of the Great Valley section of the Ridge and Valley province. This area is underlain by Cambrian and Ordovician carbonates, including rocks of the Conococheague and Beekmantown Groups. The southern third of the quadrangle is in the Newark Lowland section of the Piedmont province. Most of the exposed rocks in this area consist of red shales, red quartzose sandstones, and quartz conglomerates of the Gettysburg Formation of the upper Newark Group. There are also some diabase intrusions in this area. The report includes a plate with a 1:24,000-scale geologic map and several cross sections.
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