1. Geologic map of the Garards Fort quadrangle and part of the Osage quadrangle, Greene County, Pennsylvania Yale Public content 1971. 2012-11-07T21:31:25Z. 2012-11-07T21:31:25Z. Kent, Bion H. (Bion Huntley), 1925-. The Survey. English. Public. Pennsylvania and Greene County.