Arkose – Beautiful Sedimentary Rock

Arkose is a beautiful sedimentary rock that is typically gray, pink or red. This coarse-grained rock forms when igneous rocks break apart and the pieces travel to a river, lake or ocean.

Loess – the Earth’s most fragile rock!

Loess is formed from fine (small) grained, windblown sediment in glacier or desert areas. Loess is made of mostly silt but may also have some small amounts of sand and clay. The major mineral present is quartz with minor amounts of feldspar, calcite, dolomite, and clay.

Why do sandstone rocks sometimes have holes in them?

Why do sandstone rocks sometimes have holes in them?