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Sedimentary Rocks Types of Rocks Particles Many types Dirt Sand Crystals Organic material Compressed Compacted Different sizes 1. Made from sediments 2. Deposition: Settling of sediments in a location. Leads to… 3. Stratification: Layering of rock. 4. Characteristics determined by the source of sediment. 5. Angularity: Caused by collisions between sediments during erosion. 1. Size/shape/types of sediments can vary. 2. Compaction and/or Cementation 3. Cross beds, reverse beds, graded beds. Magma Lava 4. Sed. Rock Formation Classes: Chemical, Organic, Clastic 5. Uneven and angular. 6. Smooth and rounded. Sediments: Loose fragments of rocks, minerals and/or organic material. Sandstone-small particles Compaction: Weight/pressure of many layers squeezes sediments together. Size of space (pores) in between sediment varies. Cementation: Water deposits certain minerals into pore spaces in between sediments and act as glue to hold together. Chemical: Evaporation of liquid leaves sediment behind. Organic: Remains of living things. Clastic: Erosion of sediments by wind, water, or ice creates large fragments, smaller sand size sediments and very small, fine clay-like sediments. Erosion can cause sediments to be rough or smooth. All metal Individual minerals Igneous rocks Metamorphic rocks Sedimentary rocks within all types of rocks are made of sediments that are cemented and/or compacted together. Sediment origin can vary, as well as, the size, shape and arrangement.