Sedimentary Rocks/EPCC/LM5 A

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Sedimentary Rocks/EPCC/LM5 A

  1. 1. Sedimentary Rocks
  2. 2. Depositional Environments
  3. 3. Clastic Sedimentary Rocks Breccia Conglomerate Grain size is greater than 2 mm or granule size or larger
  4. 4. Clastic Sedimentary Rocks Sandstones Sandstone is a clastic sedimentary rock made up mainly of sand-size (1/16 to 2 millimeter diameter) weathering debris. Environments where large amounts of sand can accumulate include beaches, deserts, flood plains and deltas.
  5. 5. Clastic Sedimentary Rocks Siltstone is a clastic sedimentary rock that forms from silt-size (between 1/256 and 1/16 millimeter diameter) weathering debris.
  6. 6. Clastic Sedimentary Rocks Shale is a clastic sedimentary rock that is made up of clay-size (less then 1/256 millimeter in diameter) weathering debris. It typically breaks into thin flat pieces.
  7. 7. Chemical Sedimentary Rocks Limestone is a rock that is composed primarily of calcium carbonate. It can form organically from the accumulation of shell, coral, algal and fecal debris. It can also form chemically from the precipitation of calcium carbonate from lake or ocean water.
  8. 8. Chemical Sedimentary Rocks Evaporites Rock Salt and Rock Gypsum are chemical sedimentary rocks that forms from the evaporation of ocean or saline lake waters.
  9. 9. Chemical Sedimentary Rocks Chert is a microcrystalline or cryptocrystalline sedimentary rock material composed of silicon dioxide (SiO2). It breaks with a conchoidal fracture, often producing very sharp edges Coal is an organic sedimentary rock that forms mainly from plant debris.
  10. 10. Sedimentary Structures Cross bedded sandstone
  11. 11. Sedimentary Structures Graded Bedding
  12. 12. Sedimentary Structures Mud Cracks Fossilized Mud Cracks
  13. 13. Sedimentary Structures Ripple Marks
  14. 14. Sedimentary Structures Trace Fossils

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