Geology Reports
Geology topics
Search indexed USGS publications on groundwater, aquifers, geologic maps, mineral resources and earthquakes. Explore source records by subject and place.
Explore by place
United States65,259 records ↗California7,242 records ↗Alaska5,134 records ↗Florida2,281 records ↗Colorado2,206 records ↗Washington1,761 records ↗Utah1,663 records ↗Arizona1,516 records ↗Texas1,450 records ↗Nevada1,391 records ↗Wyoming1,361 records ↗Oregon1,326 records ↗Canada, United States1,312 records ↗Hawaii1,288 records ↗New York1,230 records ↗Montana1,120 records ↗Idaho1,093 records ↗New Mexico1,017 records ↗Minnesota970 records ↗Wisconsin925 records ↗Louisiana864 records ↗Massachusetts847 records ↗Pennsylvania804 records ↗North Carolina710 records ↗
People & collections
Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey6,610 records ↗C.S. Robbins610 records ↗U.S. Geological Survey421 records ↗Jon E. Keeley346 records ↗Christopher J. Schenk316 records ↗Douglas H. Johnson301 records ↗Robert N. Fisher287 records ↗John Y. Takekawa277 records ↗J.D. Nichols237 records ↗L.D. Mech229 records ↗Michael L. Casazza211 records ↗Joshua T. Ackerman210 records ↗J. Andrew Royle209 records ↗Charles J. Henny206 records ↗Kevin D. Lafferty201 records ↗Tracey J. Mercier200 records ↗Jayne Belnap198 records ↗John F. Piatt197 records ↗Sasha C. Reed196 records ↗Curt D. Storlazzi195 records ↗Dames & Moore195 records ↗Kenneth Belitz195 records ↗Dana W. Kolpin182 records ↗John B. Bradford176 records ↗