Sedimentary Geology Geos 240

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Sedimentary GeologyGeos 240 Chapter
3Sedimentary Petrology-1

• Dr. Tark Hamilton
• Camosun College

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Sedimentary Petrology

• Classification of Sediments
• Clastic or Detrital Sediments prior rocks
  minerals
• Chemical precipitates products of reactions
• Biological sediments Peat, Coal, Chert, Chalk
• Components of Sediments
• Grains rocks, sand, fossils, clays, organics,
  allochems
• Matrix mud or finer bulk material than larger
  grains/clasts, orthochems
• Cements calcite, silica, iron oxides, clays,
  zeolites

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Sedimentary Petrology

• Classification of Clastic Sediments
• Grain size distribution
• Grain shape
• Composition
• Provenance
• Facies continental, glacial, lacustrine,
  fluvial, deltaic, littoral, shelf, deep basins
• Classification of Carbonates
• Folks system and Energy Spectrum
• Dunhams System
• Carbonate Facies from Purdy Bahamas platform

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Estimating Particle Shapes
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Estimating Grain Proportions for various
particle shapes and areas
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Sedimentary Petrology

• Evaporites
• Classification
• Origin
• Distribution
• Diagenesis
• Cementation/Recrystallization
• Pseudomatrix
• Secondary Porosity
• Fossilization

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Dolomite Intraclast BrecciaOrdovician, Ottawa
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Classification
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fractures, unconformities, fluid events
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Classification by Grain Size
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What comprises a sandstone?
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QFLGrainSizePrism
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Provenance
Q
F
L
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Bill Comes Ashore at Peggys Cove, NS
The same source
What will the modern beach sand be?
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