During the period of April 27 to June 8, 1956, Rio de Oro Dysart Shaft Ore from the Ambrosia Lake District, New Mexico, was treated in the Acid Leach - Resin-In
During the period of February 10 to May 8, 1958, Holly Blend ore from the Holly Minerals Company of the Ambrosia Lake district in New Mexico was treated in the
The preliminary operation of the Acid Leach - CCD - Solvent Extraction Pilot Plant at Grand Junction, Colorado, was conducted from November 8, 1956 to January 3