Shale formation with numerous horizontal beds of rock at Marble Canyon in Kootenay National Park, in the Canadian province of British Columbia (2025)
1mon 5d ago by lemmy.world/u/Innerworld in earthscience@mander.xyz from upload.wikimedia.org
cross-posted from: https://lemmy.world/post/46766835
Shale is a fine-grained, clastic sedimentary rock formed from mud that is a mix of flakes of clay minerals and silt-sized particles of other minerals, especially quartz and calcite. It is characterized by fissility, the tendency to split into thin layers less than 1 centimetre (0.39 in) in thickness, and is the most common sedimentary rock.
Photographer: Chris Woodrich