Geophysical and Geospatial Resources
Fault Line Map Finder
Sort by State Geologic Maps. Includes Clickable Soil Geochemistry by selecting Lithology
http://worldmap.harvard.edu/maps/USGS-MRData-CONUS
Map of Oregon Fault Lines
https://www.portlandoregon.gov/pbem/article/394641
Build your own mapping portal and publish it to the world or to just a few collaborators. WorldMap is open source software.
http://worldmap.harvard.edu/
Geologic maps of US states. Digital geologic maps of the US states with consistent lithology, age, GIS database structure, and format. Sorted by state with clickable soil maps.
http://mrdata.usgs.gov/geology/state/
Lithclass polygon colors for above state maps or each map is clickable to display soil type.
http://mrdata.usgs.gov/catalog/lithclass-color.php
The USGS National Geologic Map Database Search Page
Master site where you can search geology, geophysics, geochemistry and more.
http://ngmdb.usgs.gov/ngm-bin/ngm_compsearch.pl
National Geologic Map Database Main Homepage
http://ngmdb.usgs.gov/ngmdb/ngmdb_home.html
Geologic Map of California
Shows surface soil type for any location in California
http://www.quake.ca.gov/gmaps/GMC/stategeologicmap.html
Aeromagnetic Anomaly Map of California
http://pubs.usgs.gov/of/1999/0440/
Magnetic anomaly maps and data for North America
http://mrdata.usgs.gov/magnetic/
Oregon Isostatic Gravity Anomaly Map
http://pubs.usgs.gov/ds/355/or_iso.htm
Quick Gravity Map - Gravity anomaly map of the conterminous United States
http://mrdata.usgs.gov/geophysics/gravity.html
Index Map of United States
Initial compilation of magnetic data for the United States
http://crustal.usgs.gov/projects/namad/United_States.html
MapView | Geologic Maps of the Nation
Explore and access published geoscience maps and reports from the National Geologic Map Database (NGMDB).
http://ngmdb.usgs.gov/maps/mapview/
Magnetic Field Calculators
Find the magnetic field strength for anywhere in the world
http://www.ngdc.noaa.gov/geomag-web/#igrfwmm
Aeroradiometric data for North America
Locate Thorium Deposits throughout North America
http://mrdata.usgs.gov/geophysics/radiometric.html
On-Line Spatial Data
Interactive map viewable by Isostatic Anomaly and Thorium
http://mrdata.usgs.gov/general/map.html
Isostatic Gravity Map with Simplified Geology of the Los Angeles 30 x 60 Minute Quadrangle
http://pubs.usgs.gov/of/2003/0269/
Gravity and Magnetic Maps of Oregon
https://www.uwgb.edu/dutchs/StateGeophMaps/OregGphMap.HTM
Geologic Maps Letter Symbols
http://geomaps.wr.usgs.gov/parks/gmap/gmap2.html
http://www.nature.nps.gov/geology/usgsnps/gmap/gmap2.html#fault
Federal Symbol Standards
http://ngmdb.usgs.gov/fgdc_gds/geolsymstd/download.php
Magnetic Anomaly Data Grid - U.S.G.S. Digital Data Series DDS-9
National Geophysical Data Grids: Gamma-Ray, Gravity, Magnetic, and Topographic Data for the Conterminous United States
http://www.geology.sdsu.edu/kmlgeology/kmz/us_mag/us_mag.html
Mineral Resources On-Line Spatial Data Interactive maps and downloadable data for regional and global Geology, Geochemistry, Geophysics, and Mineral Resources.
https://www.sciencebase.gov/catalog/item/519775dee4b09a9cb58db591
State Geologic Maps
https://www.uwgb.edu/dutchs/StateGeolMaps.HTM
Elevation Finder
Find the elevation(altitude) of any place with an easy to use point-and-click interface. You can find the height above sea level of cities, mountains
http://altitude.nu/
Graphical Elevation Map
A graphical view of the elevation for any planned route. Good forcyclists, runners, walkers, hikers. Create your own route and see the elevation profile.
http://www.veloroutes.org/
The National Map Viewer
http://viewer.nationalmap.gov/viewer/
USGS Earth Explorer
http://earthexplorer.usgs.gov/
The National Geospatial Program
http://www.usgs.gov/ngpo/
U.S.A. Topographic Maps
http://nationalmap.gov/