GEOL 101 Lecture 8: Geo 101 Lecture 8
Document Summary
Importance of climate system: when rocks weather, the climate and lithosphere interact, variability in atmosphere co2 leaders to changes in weathering rates. Isostasy- weight of sediment presses down on igneous rocks of the crust beneath. Clastic sedimentary rocks: sediment that is deposited and lithi ed into rock forms clastic sedimentary rocks. Lithi cation=cementation: more abundant than chemical and biochemical sedimentary rocks, breccia- angular, poorly sorted, not transported far, conglomerate- rounded, sort of sorted, transported some, sandstone- rounded, sorted, transported. Quartz most durable mineral during weathering: siltstone- mostly silt, sorted very well (by air usually) Loess- windblown, sorted, mostly silt: mudstone- poorly sorted silt and clay, shale- clay, lined up clay textures, good at holding fossils.
