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Geological & Planetary Sciences (GPS): Home

Welcome to Geological & Planetary Sciences Library services at Caltech!

GPS Library

The Geology & Planetary Sciences Library (GPS) houses materials in the fields of earth and planetary geology, geobiology, geophysics, geochemistry, and environmental science.

The GPS Library's collection is especially strong in materials dealing with California, the western United States, and North America. 

Special collections include geologic field-trip guidebooks of western North America (with an emphasis on the area between the Pacific Ocean and the Rocky Mountains), USGS topographic maps of California, Arizona, and Nevada, and USGS geologic maps of California, including USGS Open-File Reports and CDMG Open-File Reports. The Library also houses the division's theses, with print copies through 2002.

Location & Hours

201 N. Mudd.

Monday-Friday, 8am-5pm (Closed weekends/holidays)

(GPS division has 24/7 access via card swipe)

The Map Room is located next to the GPS Library at 207 N. Mudd. (Access requires the GPS Division key).  Please contact us to make an appointment if you are from a non-GPS Division to access the Map Room.


LibAnswers is our self-help frequently asked questions. Simply type a term and a list of answers will come up.

You can also browse popular questions or browse by topic.

You can also find a variety of ways to contact us for additional help.

Geology Library Frequently Asked Questions

Geology & Planetary Sciences Librarian

What are LibGuides?

LibGuides, created by SpringShare, are a content management system used at thousands of libraries worldwide. 

Librarians use it to curate and share information, knowledge, and resources, based on their institute's primary areas of research and their users. They are not a comprehensive guide to all available resources.

LibGuides are just that..."guides" to using a subject-specific area or topic. Further exploration is encouraged by the library user.

LibGuides can be difficult to maintain, as links can and do change frequently, resources come and go and more.

All of our Library's LibGuides are available here.