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Determination of ammonium citrate-soluble cobalt in soils and sediments
Frank Cogswell Canney, G.A. Nowlan
1964, Open-File Report 64-30
A rapid field method for the determination of cold-extractable cobalt in soils and sediments has been developed for use in geochemical prospecting. Readily available cobalt is dissolved by treating the sample with an aqueous ammonium citrate-hydroxylamine hydrochloride solution; the filtered citrate extract is then treated with 2-nitroso1-naphthol to form a...
Geology of the Guadalupe Mountains, New Mexico
Philip Thayer Hayes
1964, Professional Paper 446
After the discovery of oil in Permian rocks in Winkler County, Tex., in 1920, petroleum exploration intensified in adjacent parts of western Texas and southeastern New Mexico. Almost immediately unusual stratigraphic complexities were discovered in the Permian rocks. Thus began a long period of stratigraphic investigations, chiefly reconnaissance studies, of...