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Visual Glossary

Mosaic Canyon breccia
This breccia is found in Death Valley's Mosaic Canyon. Photo by Ray Nordeen, NPS.

 

Breccia

spacer image Breccia is a coarse-grained sedimentary rock made up of broken rock fragments with relatively sharp corners. These large, angular fragments are cemented by a fine-grained matrix or mineral cement.
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This page was last updated on 3/27/00