Sedimentary structures

Geologic structures formed during sediment deposition

Sedimentary structures

Sedimentary structures include all kinds of features in sediments and sedimentary rocks, formed at the time of deposition. Sediments and sedimentary rocks are characterized by bedding, which occurs when layers of sediment, with different particle sizes are deposited on top of each other. These beds range from millimeters to centimeters thick and can even go to meters or multiple meters thick.

From Wikipedia, under CC BY-SA. More on occurri.