Author: Arndt, Harold H. - Yale University Library GeoBlacklight Search Results

1. Geologic map of the Ashland quadrangle, Columbia and Schuylkill counties, Pennsylvania [cartographic material]

1971. 2012-03-14T14:47:40Z. 2012-03-27T23:59:11Z. Arndt, Harold H. U.S. Geological Survey. English. Public. Pennsylvania, Columbia County, and Schuylkill County.

2. Geologic map of the Mount Carmel quadrangle, Columbia, Northumberland, and Schuylkill Counties, Pennsylvania [cartographic material]

1971. 2012-03-14T14:53:32Z. 2012-03-27T23:59:11Z. Arndt, Harold H. U.S. Geological Survey. English. Public. Pennsylvania, Northumberland County, and Columbia County.

3. Geologic map of the south half of the Shamokin quadrangle, Northumberland and Columbia Counties, Pennsylvania [cartographic material]

1973. 2012-11-27T19:24:46Z. 2013-03-18T20:47:08Z. Arndt, Harold H. U.S. Geological Survey. English. Public. Pennsylvania, Northumberland County, and Columbia County.