Geochemical Characteristics of Mineralized Breccia Pipes in the Red Mountain District, San Juan Mountains, Colorado

By Frederick S. Fisher, Henry Bell, Norman L. Hatch, Paul Averitt, Richard F. Marvin, George E. Siple, Lorreda Lopez, Rolfe S. Stanley, T. W. Stern, Willard P. Leedy, Saville Cyrus Creasey, Harald H. Mehnert

Geochemical Characteristics of Mineralized Breccia Pipes in the Red Mountain District, San Juan Mountains, Colorado
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A facies change and a new Ordovician formation in southwest Massachusetts are described, and correlations between western Massachusetts and Connecticut are suggested.

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