Glossary of Geologic Terms

Introduction

This glossary contains brief definitions of technical geologic terms prepared by the NPS Geologic Resources Inventory (GRI) program and used in GRI publications and NPS geology and minerals websites.

GRI Glossary

GRI Glossary of Geologic Terms

TERMS	DEFINITIONS

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Sources

Terms in the GRI glossary were prepared by GRI report authors or adapted from primary sources, including:

• Bates, R. L., and J. A. Jackson, editors. 1984. Dictionary of geological terms. Third edition. American Geological Institute, Alexandria, Virginia.
• Neuendorf, K. K. E., J. P. Mehl Jr., and J. A. Jackson. 2005. Glossary of geology. Fifth edition. American Geological Institute, Alexandria, Virginia.

Related Links

• NPS—Glossary of Volcanic Terms

• The American Geosciences Institute

Geologic Resources Inventory