Rocks
rocks that are formed from sediments and years of compaction and cementation
sedimentary rocks
Before deposition of sediment occurs, what two other processes must happen to change the rock to smaller sediments
weathering and erosion
When a river meets the ocean and the waters slows down resulting in rapid sedimentation. What feature is formed?
A delta
A large mass of moving ice that forms by the compacting of snow.
Glaciers
sediments that make sandstone
sand
the minerals used to glue sediments together
cement
Where is sandstone most likely to form?
coastlines, lake & river beds
this forces moves sediment in a landslide or a mudflow downwards
gravity
this rock is formed from clay and silt
shale
the water that carries the cementing agent into the spaces between sediments
groundwater
Where is shale most likely to form?
swamps, marshes, mudflats, tidal flats
Name 4 modes of erosion
wind, water, ice, gravity
limestone contains shell fossils based on this fact these rocks are made in what kind of environment
oceans, seas
these are the two processes that ALL sediments go through to form sedimentary rocks
compaction and cementation
When a river overflows its banks and carries fine sediment laterally to an adjacent lowland. The area is known as a?
Floodplain
Why is erosion classified as a destructive process? Give an example to justify your answer.
erosion occurs after weathering. weathering is rocks breaking which means they were destructive