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USGS (United States Geological Survey) is the U.S. government’s premier earth-science agency, offering free, authoritative data and research on geology, minerals, earthquakes, volcanoes, water, and natural resources, along with maps, datasets, and educational resources.
More resources on Geology
EarthHow
Simplified explanations of geology topics
Geology.com
Free geology dictionary, maps, articles
USGS Geology Resources
Official US Geological Survey education and data portal
Groundwater Hydrology
Learn groundwater hydrology with Prof. Harvey's MIT course. Explore geological principles and water's underground movement.
Advanced Soil Mechanics
Explore advanced soil mechanics principles with this course from Prof. Ladd & Dr. Jen. Deepen your geology knowledge!
Soil Behavior
Explore soil mechanics! Learn soil composition, stress, and deformation with this geology course from MIT professors Ladd, Jen, and Whittle.