Earth Science Daily Challenge, 12/11

1
Earth Science Daily Challenge, 12/11

• What are the rocks around here like?
• Describe some of their characteristics.

2
SEDIMENTARY ROCKS

• made from small pieces of other rocks
• sediments or dissolved solids
• processes that make sedimentary rock
• weathering breaking up of materials into
  sediments and dissolved solids
• erosion transportation of materials by wind,
  water, ice, and/or gravity
• deposition laying down/settling of materials
• lithification
• compaction squeezing together of materials
• cementation natural gluing of materials

3
SEDIMENTARY ROCKS

• classified by type size of grains
• Clastic from mineral sediments
• SHALE made of clay size particles
• SANDSTONE made of sand sized particles
• CONGLOMERATE a mix of larger particles (BRECCIA)
• Organic from once-living things
• COAL made of dead trees swamp plant
• LIMESTONE made of shells of sea creatures
  (reefs)
• Chemical from crystallization of dissolved
  solids
• ROCK SALT halite crystallized via evaporation
• ROCK GYPSUM gypsum crystallized via evaporation
• LIMESTONE calcite crystallized via evaporation

4
Mudcracks
Ripple Marks