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Geochemical Characteristics of the Conterminous United States: % Fe2O3

Dates

Publication Date
Time Period
2014-07-23

Citation

Olson, J.R. and Hawkins, C.P., 2014, Geochemical Characteristics of the Conterminous United States: U.S. Geological Survey data release, http://dx.doi.org/10.5066/F7X0653P.

Summary

This raster depicts the percentage of lithological ferric oxide (Fe2O3) content in surface or near surface geology. We derived these rasters by calculating the average percent Fe2O3 content for each map unit in combined surficial-bedrock geologic maps. We used state geologic maps (Preliminary Integrated Geologic Map Databases for the United States, Open File Reports 2004-1355, 2005-1305, 2005-1323, 2005-1324, 2005-1325, 2005-1351, and 2006-1272), which depict surficial geology instead of bedrock when the surficial layers are sufficiently deep. For the state maps that do not incorporate surficial geology (i.e., midwestern states), we overlaid surficial geologic map units with thicknesses greater than 100 feet (from Soller et al. [2009]) [...]

Contacts

Point of Contact :
Desert Research Institute
Distributor :
U.S. Geological Survey - ScienceBase
Metadata Contact :
John R. Olson
Originator :
John R. Olson, C. P. Hawkins

Attached Files

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Fe2O3_raster_FGDC.xml
Original FGDC Metadata

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25.25 KB application/fgdc+xml
Extension: Fe2O3_raster.zip
Fe2O3_raster.sd 137.65 MB
thumbnail.png thumbnail 30.39 KB

Purpose

These rasters were created to quantify the influence of geology on surface and critical zone processes like stream water chemistry, soil formation, ecologic processes, and species distributions by providing estimates of spatial variability in current geochemical and geophysical conditions occurring at or near the surface.
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WMS Service

Communities

  • USGS Data Release Products

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Additional Information

ArcGIS Service Definition Extension

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