1. Geologic map of the Bushkill quadrangle, Pennsylvania-New Jersey [cartographic material] Yale Public content 1971. 2012-03-13T14:07:19Z. 2012-03-27T23:58:50Z. Alvord, Donald C. (Donald Clayton), 1922-. The Survey. English. Public. Pennsylvania, Pike County, Monroe County, New Jersey, and Warren County.