GEOL 008 Lecture Notes - Lecture 1: Oldest Dated Rocks, Acasta Gneiss, Sulfur Dioxide
Document Summary
A specific group of animals, all descended from a common ancestor. Gives us insight of how evolution takes place. Study of physical structure and materials of earth. Earth records its history in its rocks. Gives us a story of the history of the past. Tells us how far back these animals have been around. Take rocks and fossils and stitch them all together. Lets us build a history of the earth. Desert rocks, ocean rocks, sediment just piling up for years: sediment is compacted and cemented i. ii. Minerals grow and bond particles together into the space between minerals/sand grains: sand grains being cemented together, rocks named by sediment size i. Verrrrry small (<1/256 mm: clay makes shale ii. Quite small (1/256 - 1/16 mm: silt makes siltstone iii. Bigger stuff: pebbles and bigger make conglomerate, different environments make different sedimentary rocks i. ii. All types of sedimentary rocks could contain fossils.
