GEOL 101 Lecture 2: Geology Unit 2
Document Summary
Last erupted 640 ad, created a 100km caldera. Repeated erupions and lava lows over a large area and extended ime frame. Tambura indonesia ejected esimated 35 cubic miles of pyroclasic debris into atmosphere. 1816- year without a summer in north american and europe: migraions of people to ind beter land for crops. Change in temp. pressure, and chemical environment: earthquake swarms. Change in grain size (usually larger: recrystallizaion. To contact with magma: pressure (increases with depth) Lithiicaion transformaion from loose sediment to solid rock: burial- more sediment is added onto previous layers, compacion- overburden weight reduces pore space. Coal = plant debris that got lithiied. Classiied based on texture and composiion: clast (grain) size (fine grained = silt, clay, shale, mudstone, clast composiion, angularity and sphericity, soring (coarse chunks = not well sorted, character of cement. Limestone giving out can cause a sinkhole. Limestone caco3 skeletal remains: requires shallow water, light (phoic zone), and construcion.
