Sedimentary structures reveal depositional conditions.
Sample contributed by Declan De Paor.
Primary dessication structures in modern tidal mudflats.
Meteorite impact ash deposits of ultramafic composition, deposited in a marine setting during the Archean Fig Tree Group of Barberton Mountain Land, South Africa.
Selected locations showing truncated cross bed sets are labeled.
Nice fine sandstone with a stack of cross-bedded packages.
A nice example of cross-stratification in a fine sandstone
Proterozoic sedimentary structures in a rock from the Franklin Mountains, West Texas.
Fossil "crinklies" from 3.22 Ga.
Not a member yet? Sign up