Gamma-ray, Magnetic, and Topographic Data for the Colorado Front Range

Online link https://geo-nsdi.er.usgs.gov/metadata/open-file/00-331/metadata.faq.html
Description The grid files presented here are in ASCII format that uses the definitions of the grid exchange format (GXF). The files can be viewed using a suitable word processing program. The different grids are: >Kfrco.gxf potassium concentrations in the rocks
Originators Duval, Joseph S.; Reed, John C., Jr.; and Zietz, Isadore

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