1. Sedimentary RockStudents will be able toDescribe how rocks are formedClassify the sedimentary typesList uses for this rock type
2. Changing Earth’s Surface Weathering Physical breaking of rock Mass Wasting Falling due to gravity Erosion Removal by mobile agents (water, wind, ice…)
9. Sedimentary Rock 5% of Earth’s outer crust High Value Contains major energy resources Contains fossil record
10. Formation Compaction Weight of material on top presses into rock Cementation Minerals enter spaces between to harden
11. Types Clastic Rock fragments squeezed together Organic Formed from remains of living things Chemical Formed from chemical during evaporation
12. Clastic Shale 50% of all sedimentary rock Made from tiny pieces of clay Black due to abundant carbon (living) Formed in oxygen poor area (swamp) “prevents decay”
13. Sandstone 20% of all sedimentary rock Small grains (wind or river)