Take a good, close look at sand, ash, and other sediments.
Sediment from a point bar in Accotink Creek, Fairfax, VA, USA.
A selection of cobbles at the beaches around Dunbar: Old Red Sandstone is the most common lithology.
Found cropping out along the beach at Barns Ness, east of Dunbar, Scotland.
Chalk, chert, and basalt predominate.
Chalk, chert, and basalt dominate the lithologies of these well-rounded beach cobbles.
Dolerite sill that intruded the Liassic shale on the east side of Portrush, Northern Ireland.
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