Classifying Sedimentary Rocks
HOW ARE THEY FORMED
WEATHERING
Igneous rock is broken down to form new minerals
DEPOSITION
Sediment accumulates in a deposit area from a source area
COMPACTION
The new minerals are overlayed, forcing
forcing grains together
CEMENTATION
Precipitation of mineral matter in the space of the grains
, holding the grains together
TYPES OF SEDIMENTARY ROCKS
CLASTIC
Form from weathering products that
don't dissolve in water
CLASTS
Large pieces of sand or gravel
MATRIX
Mud/ grained sediment surrounding
clasts
CHEMICAL SEDIMENTARIES
Form when mineral constituents in solution
become supersaturated and inorganically precipitate.
ORGANIC SEDIMENTARIES
Form from accumulation of organic debris (carbon containing)
Contain Calcite