 |
|
|
||||
| Educational Resources |
| USGS Education Home / Primary Education / Secondary Education / Undergraduate Education |
USGS Education Map Catalog: Energy and Physics
PLEASE NOTE: The USGS Education Map Catalog has been relocated to the USGS Store. Go to USGS Store and click on "Education Products". The page that you are currently viewing is no longer being updated or maintained. It will remain in place for now but will eventually be removed.
| International | |
|
South America Geology and Energy--This digital geologic map and geologic province map of South America was produced for the World Energy Project of the USGS. The purpose of this project is to provide a quantitative assessment of undiscovered recoverable sources of oil and gas in priority geologic provinces throughout the world. Oil and gas data were digitally allocated to the geologic provinces, and these provinces were then ranked according to known oil and gas resources to provide a prioritization for the resource assessment. Political boundaries shown on this map were taken, with permission, from the ESRI ArcWorld 1:3 million scale digital world coverage and are displayed for general reference only. Use this map to teach and learn about geology and energy in South America. Click here for other continents and regions in this series.
Product ID Number Open File Report 97-470D |
| USA States and Regions | |
|
Colorado Aeromagnetic Anomaly Map--Why isn't magnetism uniform across the Earth's surface? Use this map to explain why. Aeromagnetic anomalies are due to variations in the Earth's magnetic field caused by the uneven distribution of magnetic minerals (primarily magnetite) in the rocks that make up the upper part of the Earth's crust. The features and patterns of the aeromagnetic anomalies can be used to delineate details of subsurface geology including the locations of buried faults, magnetite-bearing rocks, and the thickness of surficial sedimentary rocks (which are generally non-magnetic). This information is valuable for mineral exploration, geologic mapping, and environmental studies. The Colorado aeromagnetic map is constructed from grids that combine information collected in 34 separate aeromagnetic surveys conducted between 1952 and 1986. The data from these surveys are of varying quality. Click here for listing of aeromagnetic anomaly maps in other states.
Product ID Number Open-File-Report 00-0042
|
|
Colorado Gravity Anomaly Map--Why isn't gravity constant across the Earth's surface? Use this map to explain why. The colors on isostatic gravity maps reflect variations in the Earth's gravity field caused primarily by lateral variations in density in the rocks that make up the upper part of the Earth's crust. An isostatic gravity grid was derived from Bouguer and free-air gravity anomaly data. This grid was created by removing from the Bouguer gravity grid a model of the gravity expression caused by deficiencies in mass (compensating mass) that supports topographic loads. The calculation of the isostatic model used averaged digital topography, a crustal thickness of 30 km, a crustal density of 2.67 g/cc, and a density contrast between the crust and upper mantle of 0.40 g/cc. The features and patterns of the maps reveal details of subsurface geology including the location of buried faults, sedimentary basins, plutons, uplifted basement rocks, and other features. Positive anomalies (red colors) delineate rocks denser than the surrounding rocks. Negative anomalies (blue colors) delineate rocks less dense than the surrounding rocks.
Product ID Number Open-File-Report 00-0042 |
|
South Dakota Aeromagnetic Anomaly Map--Why isn't magnetism uniform across the Earth's surface? Use this map to explain why. Aeromagnetic anomalies are due to variations in the Earth's magnetic field caused by the uneven distribution of magnetic minerals (primarily magnetite) in the rocks that make up the upper part of the Earth's crust. The features and patterns of the aeromagnetic anomalies can be used to delineate details of subsurface geology including the locations of buried faults, magnetite-bearing rocks, and the thickness of surficial sedimentary rocks (which are generally non-magnetic). This information is valuable for mineral exploration, geologic mapping, and environmental studies. The South Dakota aeromagnetic map is constructed from grids that combine information collected in 15 separate aeromagnetic surveys conducted between 1953 and 1985. The data from these surveys are of varying quality. Click here for listing of aeromagnetic anomaly maps in other states.
Product ID Number Open-File-Report 02-341 |
Back to Top
Back to USGS Education Map Catalog
To order USGS maps or other products, contact:
Your authorized USGS Business Partner. A listing of these is available on:
http://rockyweb.cr.usgs.gov/acis-bin/querypartner.cgi
Order online: http://store.usgs.gov
or visit: http://ask.usgs.gov
or call 1-888-ASK-USGS
or write:
US Geological Survey, Map Distribution, Denver Federal Center, Box 25286, Denver, Colorado 80225-0286 USA
Or access the order form: http://mac.usgs.gov/isb/pubs/forms/usgsbooks.pdf
| AccessibilityFOIAPrivacyPolicies and Notices | |
  |
|
