| DATA THEME |
DEFINITION |
| Geology |
General Bedrock |
geologic mapping of rocks at or near the Earth's surface |
| General Surficial |
geologic mapping of sediment at the Earth's surface |
| Structure Contours |
maps of structure, or thickness, of buried geologic units |
| Engineering |
maps of soils or engineering properties of surficial geologic units |
| Other |
other assorted map information |
| Geophysics |
Magnetics |
maps of the magnetic field induced in different rocks |
| Gravity |
maps of variations in Earth's gravity field |
| Radiometrics |
maps of natural radioactivity of different rocks |
| Other |
other assorted map information |
|
| Marine Geology |
Geophysics |
geophysical maps of submerged earth materials |
| Coastal |
maps of the coastal zone (e.g., areas of erosion or sedimentation) |
| GLORIA |
images of the ocean floor, as detected by the GLORIA surveys |
| Other |
other assorted map information |
| Resources |
Metals |
maps of metallic resources (e.g., copper) |
| Nonmetals |
maps of nonmetallic resources (e.g., sand and gravel) |
| Energy, Petroleum |
maps of oil and gas, oil shale, tar sands, etc. |
| Energy, Coal |
maps of coal beds, mining, etc. |
| Energy, Other |
maps of uranium, geothermal sites, etc. |
| Water |
maps of ground water aquifers, water quality, etc. |
| Other |
other assorted map information (e.g., geothermal resources) |
| Hazards |
Earthquakes |
maps related to earthquake hazards (e.g., faults, earthquake zones) |
| Volcanoes |
maps related to volcano hazards (e.g., eruption history) |
| Landslides |
maps of existing landslides or landslide potential |
| Environmental |
maps specifically noting environmental hazards |
| Other |
various hazards, not restricted to a single hazard listed above |
| Geochronology |
isotopic age estimates, shown on a map or spatially referenced in a
database |
| Paleontology |
fossil localities, descriptions, and ages, shown on a map or
spatially referenced in a database |
| Geochemistry |
geochemical analyses, shown on a map or spatially referenced in a
database |
| All Themes |
All themes listed above, inclusive |
