Sedimentary Rock Review Flashcards
What is mechanical weathering?
The physical breakdown of rocks. Example:water and waves.
What are two types of rock weathering?
Mechanical and Chemical
What is chemical weathering of rocks?
Compositional change a chemical reaction. Example: acid
What are four agents of the erosion?
H2O, wind, gravity, glaciers or ice
Deposition agent of erosion energy level.
What are the three levels?
What are the sediment sizes?
What is the distance traveled?
Low, small clay/silt, far
Medium, sand,
High, gravel/bolder, close
Step 4 Lithification
Compaction?
Cementation?
Compaction: sediments are buried H2O is squeezed out.
Cementation: mineral crystals grow in pores, locks sediments together
What are three grain sizes with examples?
Clay-small
Sand-medium
Gravel-large
What are three grain shapes?
angular
Rounded
Well rounded
Two grain arrangements?
Poorly sorted
Well sorted
Detrital composition type is made of?
Rock fragments
Chemical composition type is made up of?
Mineral crystals
Bio chemical composition type is made up of?
Plant and animal fragments
Shale -what is the dispositional environment?
Calm H2O, low energy, deep sea/Ocean
Sandstone dispositional environment?
Beaches, rivers, streams,deserts, sand dunes
Conglomerate and Breccia depositional environment?
High energy fast running turbulent water
