Atlas 178
	Geology and mineral resources of the New Holland quadrangle, Pennsylvania (Ephrata, Terre Hill, Leola, and New Holland 7.5-minute quadrangles, Lancaster County) by Jonas, A. I., and Stose, G. W. 1926
Suggested Citation:	Jonas, A. I., and Stose, G. W., 1926, Geology and mineral resources of the New Holland quadrangle, Pennsylvania: Pennsylvania Geological Survey, 4th ser., Atlas 178, 40 p. [Available online.]
Description:	Detailed report on the geology and mineral resources of the New Holland 15-minute quadrangle, which is located primarily in Lancaster County with a small part in Berks County, in southeastern Pennsylvania. The area lies within the Gettysburg-Newark Lowland, Piedmont Lowland, and Piedmont Upland sections of the Piedmont physiographic province. Most of the area is underlain by Precambrian graphitic gneiss and Cambrian and Ordovician sedimentary rocks (clastics and carbonates). Some of the gneiss has been intruded by granite and gabbro, and some of the sedimentary rocks have been metamorphosed. The northernmost part of the area is composed of Triassic sandstones, conglomerates, and shales. The 1:62,500-scale geologic map that is part of the report shows several diabase dikes in the quadrangle, and a diabase sheet is shown in the Triassic rocks in the northeastern part of the quadrangle. The area is folded and a number of faults are noted. The New Holland area is known as a source of limestone, sand, and clay—limestone being the chief mineral resource because of the wider distribution of the limestone formations.
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