Abstract

This mineral was collected by E. F. Burchard of the U. S. Geological Survey, in October of 1925, while studying the iron ore resources of Argentina. It was collected from a stock pile consisting of several tons of this crystalline mineral near the railroad station of Salado, in the province of La Rioja. Dr. Jose M. Sobral, Director of the Bureau of Mines, Geology and Hydrology of the Argentina Republic, who was present at the time endeavored to ascertain the exact location of the deposit but there was reluctance on the part of the shippers to divulge the information so the closest approximation as given by Dr. Sobral is the Sierra de Zapata, Catamarca Province, Argentina.

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