Cementation (geology)
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Cementation is a process where minerals bond grains of sediment together by growing around them. This means precipitation of ions carried in groundwater to form new crystalline material between sedime
Calcite cement in an ooid-rich limestone; Carmel Formation, Jurassic of Utah
Breccia
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Breccia is a clastic rock composed of angular, coarse^ fragments bound by a finer-grained matrix and/or cement.
Cementation (geology)
…form "bridges" between original sediment grains, thereby binding them together. In this way, sand becomes sandstone, and gravel becomes conglomerate or breccia. Cementation occurs as part of the diagenesis or lithification of sediments and occurs primarily below the water table regardless of sedimentary grain…
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