Breccia
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Breccia is a clastic rock composed of angular, coarse^ fragments bound by a finer-grained matrix and/or cement.
Basalt breccia in the Canary Islands; green groundmass is composed of epidote
Megabreccia (left) at Titus Canyon Narrows, Death Valley National Park, California
Tertiary breccia at Resting Springs Pass, Mojave Desert, California
Unusual breccia cemented by azurite and malachite, Morenci Mine, Arizona
Conglomerate (geology)
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Conglomerate is a sedimentary rock made up of rounded gravel-sized pieces of rock surrounded by finer-grained sediments. The larger fragments within conglomerate are called clasts, while the finer sed
Breccia
…by landslides, impact events, or caldera collapse. Breccia is composed of coarse rock fragments held together by cement or a fine-grained matrix. Like conglomerate, breccia contains at least 30 percent of gravel-sized particles (particles over 2mm in size), but it is distinguished from conglomerate because the…
Boulder of quartz-pebble conglomerate with large clasts, from Sharon Conglomerate
Carmelo Formation (conglomerate) at Point Lobos
Nagdong Formation at Sangju
A conglomerate at the base of the Cambrian in the Black Hills, South Dakota.