Some years ago the writer (Pabst, 1931) described the garnets found in the Franciscan schists of California and reported that their composition could be expressed in terms of end members as being roughly 50 mole % almandite, usually with substantial proportions of pyrope, grossularite and andradite, but with only a very little spessartite. In summarizing the range of spessartite content was given as “0-1%.”

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