Red sandstone, close-up. This detrital sedimentary rock sample contains quartz and feldspar grains and some white mica. The argillaceous (clay-contain

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Red sandstone, close-up. This detrital sedimentary rock sample contains quartz and feldspar grains and some white mica. The argillaceous (clay-containing) cement-like bulk of the rock is coloured by iron oxide. This specimen dates from the Eocene (37 million years ago), and formed on the bottom of a lake. It is used as a construction stone. This specimen is part of the Geoscope geological park, located between Les Monts-Vert and Albaret-Sainte-Marie, central France.

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Size: 5173px × 3449px
Photo credit: © MARTYN F. CHILLMAID/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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