Mineral Resource Report 089
	Coal resources of Allegheny County, Pennsylvania—Part 1, Coal crop lines, mined-out areas, and structure contours by Dodge, C. H. 1985
Suggested Citation:	Dodge, C. H., compiler, 1985, Coal resources of Allegheny County, Pennsylvania—Part 1, Coal crop lines, mined-out areas, and structure contours: Pennsylvania Geological Survey, 4th ser., Mineral Resource Report 89, 68 p. [Available online.]
Description:	This report consists of coal data for Allegheny County compiled on 7.5-minute topographic quadrangle maps. The maps were drawn at 1:24,000 scale and published at 1:62,500 scale (page size). There are two types of maps in the report. For each of the mined principal coal seams in a given quadrangle, a map shows the coal crop line (outcrop), areas where the coal is known to be absent because of seam discontinuities, and the extent of all known strip and deep mining up to the time of compilation (1979–80, 1984). For each quadrangle, a composite map shows all principal and minor coal crop lines, structure contours drawn on a principal coal, and fold axes. In addition to symbol explanations, the maps contain information on published and unpublished data sources and reliability.
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