Arsenic as an indicator element for mineralized volcanic pipes in the Red Mountains area, western San Juan Mountains, Colorado
Explore the source record for details and available documents.
Bulletin↗
Geology topics
Frederick Norville Ward
Publications and source records attributed to Frederick Norville Ward.
Analytical methods used in geochemical exploration by the U.S. Geological Survey
Explore the source record for details and available documents.
Bulletin↗
Colorimetric determinations of traces of bismuth in rocks
Explore the source record for details and available documents.
Bulletin↗
Compilation of field methods used in geochemical prospecting by the U.S. Geological Survey
The field methods described in this report are those currently used in geochemical prospecting by the U. S. Geological Survey. Some have been published, others are being processed for publication, while others are still being investigated. The purpose in compiling these methods is to make them readily available in convenient form. The methods have not been thoroughly tested and none is wholly satisfactory. Research is being continued.
Circular↗