1. Geologic map of the Glenns Ferry-Hagerman area, west-central Snake River Plain, Idaho Yale Public content 1972. 2012-11-13T19:41:00Z. 2023-02-09T21:27:15Z. Malde, Harold E. (Harold Edwin), 1923-. U.S. Geological Survey. English. Public. Snake River Plain (Idaho and Or.).