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Publication Extents

Not all publications have extents, not all extents are completely accurate
Thickness of overburden map, Annandale Quadrangle, Virginia
A.J. Froelich
1975, Open-File Report 75-153
Volcanic and sedimentary rocks of late Precambrian age include four formations of volcanic rocks (three newly recognized) and four formations of sedimentary rocks, with a total apparent thickness of more than 60,000 feet. The Siemens Creek Formation, composed of: thin basalt flows, and the overlying Kallander Creek Formation, composed predominantly of...