A regional assessment of untreated groundwater in the Cambrian-Ordovician aquifer system, which includes parts of Minnesota, Wisconsin, Michigan, Iowa, Illinois, Missouri and Indiana, is now available from the U.S. Geological Survey.
Latest posts by Jhon Lawrence (see all)
- Tracing the sources of ancient volcanoclastic rocks in Yellowstone using crystals - March 13, 2023
- The first geological map of Yellowstone National Park - February 20, 2023
- Bipartisan Infrastructure Law funds geologic mapping in western Rockies - February 15, 2023