Red and white sandstone. This detrital sedimentary rock sample contains quartz and feldspar grains and some white mica. Part of the argillaceous (clay

---

Red and white sandstone. This detrital sedimentary rock sample contains quartz and feldspar grains and some white mica. Part of the argillaceous (clay-containing) cement-like bulk of the rock is coloured by iron oxide (reddish-brown). 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.

---

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

Keywords: aire, argillaceous, de, detail, detrital, earth, eocene, europe, european, exhibit, feldspar, france, french, geochemistry, geography, geological, geology, geoscope, iron, la, lozere, mica, mineral, mineralogy, oxide, park, physical, quartz, red, rock, sample, sandstone, science, sedimentary, specimen, white