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Coal Resources of Lawrence County, Pennsylvania
This report records the distribution, thickness, and reserves of coal in Lawrence County, Pennsylvania.
Date:
1964
Creator:
Van Lieu, J. A. & Patterson, E. D.
System:
The UNT Digital Library
Chromite and Other Mineral Deposits in Serpentine Rocks of the Piedmont Upland, Maryland, Pennsylvania and Delaware
From abstract: The Piedmont Upland in Maryland, Pennsylvania, and Delaware is about 160 miles long and at the most 50 miles wide. Rocks that underlie the province are the Baltimore gneiss of Precambrian age and quartzite, gneiss, schist, marble, phyllite, and greenstone, which make up the Glenarm series of early Paleozoic(?) age. These are intruded by granitic, gabbroic, and ultramafic igneous rocks. Most of the ultramafic rocks, originally peridotite, pyroxenite, and dunite, have been partly or completely altered to serpentine and talc; they are all designated by the general term serpentine. The bodies of serpentine are commonly elongate and conformable with the enclosing rocks.
Date:
1960
Creator:
Pearre, Nancy C. & Heyl, Allen V., Jr.
System:
The UNT Digital Library
Geology and Coal, Oil and Gas Resources of the New Kensington Quadrangle, Pennsylvania
From abstract: This report is one of a series of publications by the United States Geological Survey on the Appalachian coal, oil, and gas fields. The area described occupies 227 square miles in Allegheny, Butler, and Westmoreland Counties, in western Pennsylvania, immediately north of Pittsburgh.
Date:
1932
Creator:
Richardson, G. B.
System:
The UNT Digital Library
Stratigraphy of the Bitmuninous Coal Field of Pennsylvania, Ohio and West Virginia
From introduction: This report deals with the Middle and Upper Carboniferous System.
Date:
1891
Creator:
White, Israel C.
System:
The UNT Digital Library