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“Geology is the study of the history and structure of the Earth (and other worlds), as well as the physical processes that act upon the world. It is a field that uncovers fundamental relationships and laws in the universe.”
-- Description from San Diego City College Catalog 2019-2020 Catalog (pdf).
Image: Geomorphological regions of California. Author: Ssalonen, derivative work: Babbage. License: CC-BY-SA 3.0 Unported. Original source: California_Topography-MEDIUM.png, modified by Babbage.