👉 In the field of geology, a "pegmatophyre" is a type of rock formation that results from the accumulation and transformation of tiny grains or particles into larger rocks. This process occurs through a process called cementation, which involves the physical bonding between the smaller particles and the larger rocks. The sedimentary rock can be composed of various types of materials such as sandstone, limestone, granite, etc., depending on the type of cementation that occurred. In summary, a "