the rock containing this fossil? (1) The rock was formed by the metamorphism of sedimentary rock deposited in a terrestrial environment during the Cretaceous Period. (2) The rock was formed by the compaction and . cementation of sediments deposited in a terrestrial environment during the Triassic Period. (3) The rock was formed by the compaction and
F:DocumentsEarth ScienceUnit 2 RocksMetamorphic Rocks 2 6. How far beneath the surface does shale begin to metamorphose to slate? 7. Metasomatism is described as a process by which metamorphic rocks may gradually change into granite (igneous rock). At what temperature does this occur? a. At what depth does this occur? b.