Research Tools: Pennsylvania Geology

URL:

https://www.libraries.psu.edu/psul/digital/pageo.html

Resource Types:

Full-Text

Description:

Materials relating to the geology and water resources of Pennsylvania from the PA Geological Survey, U.S.G.S., and others. Includes materials from the second (1874-1889), third (1899-1919), and fourth (1919-present) geological surveys of Pennsylvania.