Presentation on theme: "Sedimentary rocks Formed in seas and lakes. Formation Rock materials Derived from weathering and erosion Are transported by river / wind And later."— Presentation transcript:
Formation Rock materials Derived from weathering and erosion Are transported by river / wind And later deposited (sedimentation) Under the pressure of the overlying sediment These materials are hardened into solid rock
Characteristics of sedimentary rocks Non-crystalline Stratified (layered) Bedding planes between rock strata May contain fossil
Siltstone layer being eroded to form a sea arch, Tai O.
Characteristics Very fine sediment of silt and mud is deposited and cemented together on sea floor far away from coast Made up of numerous thin layers (stratified structure) It is not resistant to weathering and erosion