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A Geoscience Digital Image Library

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TitleGraywacke from Mentone, California, USA
DescriptionGraywackes are “dirty” sandstones. That is, they are sandstones that are poorly sorted and contain significant amounts of rock fragments and clay besides the normal quartz. This sample is 9 cm across.
LocationUSA ▹ California
PhotographerNessa Eull. 2001-05-21.
CollectionWard’s University Rock Collection #145.
Key wordsgraywacke, California
Tech details1.02 MB. Hand specimen. Fujifilm FinePix S1Pro digital.
GeoDIL number477