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A breccia is a rock formed by the cementation of angular fragments in a fine matrix material. They may be formed by the lithfication of a land slide or other mass wasting event and in marine environments by submarine debris flows. As such the rock type they are composed of depends on the material that was originally involved in the mass wasting event which may have been, chemical, biological, igneous, metamorphic or even a clastic sedimentary rock.

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14y ago

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