Breccia

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This breccia is found in Death Valley's Mosaic Canyon.
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.[1]

References

  1. http://wrgis.wr.usgs.gov/docs/parks/rxmin/gbreccia.html
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