Geologic map of the Ashland quadrangle, Columbia and Schuylkill counties, Pennsylvania
By: by Harold H. Arndt.
Contributors: Geological Survey (U.S.)
Series: Geologic quadrangle map -- GQ-918.
Publisher: U.S. Geological Survey
Place of publication: Washington, D.C
Format: Map
Subjects: Geology -- Pennsylvania -- Columbia County -- Maps.; Geology -- Pennsylvania -- Schuylkill County -- Maps.
Genres: Maps.
Other titles: Ashland quadrangle, Columbia and Schuylkill Counties, Pennsylvania.
Notes: Relief shown by contours and spot heights.

Includes index map, columnar section, and 2 col. cross sections.