Themes of the Day:

• Sedimentary Rock Classification
• Energy Resources from Sedimentary Rocks

Sedimentary Rock Classification

• Classification by Sediment Size, Texture, and Composition
• Clastic - composed of fragmentary material - classified by sediment size
  • Gravel-Sized Sediment - conglomerate (rounded sediment) or breccia (angular sediment)
  • Sand-Sized Sediment - sandstone (many more specific varieties)
  • Mud-Sized Sediment - mudstone, varieties: siltstone (gritty), shale (smooth, fissile)
• Organic - made up of critters, plants, or their by-products
  • e.g., peat and coal
• Inorganic and Biochemical - precipitated out of solution, in some cases by organisms
  • Carbonates (e.g., limestone and dolomite), Evaporites (e.g., halite and gypsum), and Chert

Energy Resources from Sedimentary Rocks

• Burial and Compaction of Peat
• Types of Coal
• Sulfur Content
• Distribution in USA

• traps & reservoirs