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53.2 Green Chert. Marin County, California. This waxy to crystalline green chert is actually a clast in an olistostromal metawacke. [Scale is standard GSA scale with mm dots and cm divisions.]
Image 108 of 156
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![53.2 Green Chert. Marin County, California. This waxy to crystalline green chert is actually a clast in an olistostromal metawacke. [Scale is standard GSA scale with mm dots and cm divisions.]](../53.2.JPG)