The Cooperative Soil Survey

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Glossary

Definitions from the Soil Science Society of America (SSSA)

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Gravel	Rounded or angular fragments of rock up to 3 inches (2 millimeters to 76 centimeters) in diameter An individual piece is a pebble.
Gravelly soil material	Material that is 15 to 50 percent, by volume, rounded or angular rock fragments, not prominently flattened, up to 3 inches (76 centimeters) in diameter.