All Maps
Explore all USGS Maps and refine your search by type, topic, year, location, and advanced search.
Filter Total Items: 9587
Subsurface geology of Paleozoic, Mesozoic, and Cenozoic units in southeast Missouri Subsurface geology of Paleozoic, Mesozoic, and Cenozoic units in southeast Missouri
The U.S. Geological Survey is conducting a regional water-resources investigation of the Gulf Costal Plain, which includes all of the Mississippi Alluvial Plain of southeastern Missouri, locally known as the southeast lowlands. The purpose of the regional study is to describe and evaluate the major aquifer systems in sediments of Tertiary and younger age in parts of 10 states (Grubb...