Pennsylvania Geological Survey Library


Aerial Photos

Information on aerial photography


Texts and Journals

Information on the library collection



Topographic Maps

Information on the library's collection of topographic maps


Repository Libraries

Repository libraries information


A U.S. Geological Survey ESIC (Earth Sciences Information Center) library

The library is located at the main office of the Pennsylvania Geological Survey at 3240 Schoolhouse Road in Middletown. Click here for directions.

The library is open to the public  Monday through Friday from 9 a.m. until 12 p.m. and from 1 p.m. until 4 p.m. Please use the appointment calendar to schedule your visit.

The Pennsylvania Geological Survey library houses a large collection of topographic maps, historical and recent aerial photographs, and geologic texts, maps, and journals. Most materials may be checked out of the library for one month; materials without a circulation card may not be checked out.

Included in the library collection are all the publications of the First, Second, Third, and Fourth Pennsylvania Geological Surveys. Many of the reports from the Fourth Survey are also available from local repository libraries, and some of the reports are available online. See our publications page for additional information.

Questions on library services and operations may be directed to, or call the Survey office at 717-702-2017.