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∙ 14y agoLarge angular rock fragments describes an agglomerate. This usually happens in volcanic vents.
The movement of rock fragments is called erosion.
Breccia is a coarse-grained clastic rock that contains angular fragments. These fragments are typically larger than in a conglomerate and are cemented together by a fine-grained matrix.
Large Fragments
Clasts are individual pieces of rock or mineral fragments that make up a sedimentary rock. They can vary in size and shape, ranging from tiny grains to large boulders, and are important in determining the characteristics and composition of the sedimentary rock.
The conglomerate rock you're describing likely formed from the deposition of large, angular fragments that were transported by water or ice and then fused together during the lithification process. The angular nature of the fragments suggests that they were not significantly transported from their source, indicating a nearby origin for the rock.
Breccia is a type of sedimentary rock that is composed of angular fragments of other rocks held together by a matrix. It is formed from the accumulation of broken rock fragments in a process such as a landslide or the cementing together of volcanic fragments.
A conglomerate, classified by rounded rock fragments larger than 2cm compacted and cemented into a rock.
When a volcano erupts, magma from within the Earth is expelled through the crater along with fragments of rocks, such as ash, cinders, and lava. These materials can form lava flows on the volcano's slopes or be ejected into the air as ash clouds and pyroclastic flows.
Breccia is a sedimentary rock that is composed of large angular fragments of various rocks cemented together by a fine-grained matrix. These fragments are typically a mix of different minerals and rock types, giving breccia a diverse appearance.
A clastic rock.
Gravity plays a significant role in the movement of rock fragments. Rock fragments are often transported downhill by gravity through processes like landslides, rockfalls, and creep. The weight and slope of the terrain determine the speed and distance that rock fragments can travel due to gravity.