Geology topics
L.C. Pray
Publications and source records attributed to L.C. Pray.
Geologic map of bastnaesite deposits, Birthday claims, San Bernardino County, California
In April 1949 a deposit containing considerable quantities of the rare mineral bastnaesite - the fluorocarbonate of cerium, lanthanum, and other rare earths - was discovered near Mountain Pass, San Bernardino County, Calif. Small quantities of bastnaesite have been found in several places in the United States, but this area is the first that offers promise of being a commercial source of cerium, lanthanum, and other rare earths.
California↗
South Dakota mica deposits
Explore the source record for details and available documents.
Open-File Report↗
Meek-Hogan tin prospect, Kern County, California
Explore the source record for details and available documents.
Open-File Report↗