Sedimentary Rocks

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Sedimentary Rocks

• Form at the Earths surface by the
  lithification of sediments deposited from their
  transporting medium (water, wind, or ice).

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Rock Cycle
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Erosion

• Erosion- Removes particles produced by
  weathering
• Erosive agents Water, ice, wind, gravity

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Transport

• Transport - Material carried away/downhill
• Transport Agents water, ice, wind, gravity
• Transport Capacity ability of agent to move
  material

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Transport rounding, and size reduction
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Transport sorting
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• Deposition- process by which sedimentary
  particles or crystals are laid down in beds.
• Can be subaerial or subaqueous

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Sedimentary Deposits
Chemical/ Crystals

• Clastic

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Sedimentary Bedding
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Sedimentary Structures Cross bedding
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Sedimentary Structures Cross bedding formation
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Sedimentary Structures Ripple marks
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Sedimentary Structures Ripple marks
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Sedimentary Structures Mudcracks
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Sedimentary Structures Raindrop imprints
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Fossils- remains of organisms

• Body Fossils

Trace Fossils
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Trace Fossil Bioturbation
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Lithification

• Lithification- process of turning sediments
  (loose grains or crystals) into stone
• Occurs by increased pressure and temperature
  during diagenesis

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Diagenesis

• Diagenesis- changes that happen to sediments
  after deposition

Physical changes- compaction Chemical changes-
cementation Biological changes- decompostion
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Classification of Clastic (detrital) Sedimentary
Rocks (grain size and texture)
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Clastic (detrital) Sedimentary Rocks
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Classification of Chemical Sedimentary Rocks
(Composition Minerals)
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Chemical Sedimentary Rocks