Click on a state on a map or list to access status of geologic mapping at the scales of 1:24,000 and 1:100,000 under the National Cooperative Geologic Mapping Program (NCGMP) providing federal matching funds for state geologic work.
Concerted effort to monitor, analyze, and record sightings of non-native (introduced) aquatic species throughout the United States. Explains characteristics of the database that is compiled by this program.
Instrument measures elemental abundance and isotopic ratios in samples as small as a few nanograms. Uses include geochronology, geological thermometry, and trace element geochemistry of geological and biological materials.
Long-term studies to better understand the effects of the eruption and the role of volcanism in structuring ecosystems in the Aleutian Islands, a volcano-dominated region with high natural resource values.