Asbestos associated with copper-bearing pyrite, galena, sphalerite, calcite, feldspar, quartz, and pyroxene was found in a banded fissure-vein deposit in the Snowy Range mine at Camp Albion, Boulder County, Colorado. The asbestos occurs in fibrous, sheetlike masses and in small, irregular aggregates with the minerals enumerated. The sheets are generally found in the middle of the vein and parallel to the banded structure. The irregular masses occur between the grains of the other minerals in the vein.

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