PALEO200 Lecture Notes - Lecture 2: Albertosaurus, Silt, Chanel
14 Sep 2017
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Need exposure. need to be right age-cretaceous period. Environment- only lived on land. terrestrial environment, water washing through area. and previous finds. Not a good place for new fossils- too dry. no sand and mud. big rivers before - carrying sand and mud, burying them. what were the badlands like before? wet, flat, and rivers and wetlands. 70 mill. years ago. like gulf of mexico. sedimentary rocks - sand stones, mud stones, shales, iron stones. but tehyre all breakdown product of other rocks. redoposited by water or wind and form layers. Igneous: ancient molden magma. metamorphics: sediment or igneous changed by pressure. sedimentary geologists: look at structure at each level, and tell what environment each represent. Fossilization: deserts dry, sediments must be deposited by winds. in mountain sides, carcass will disarticuate. Marine environments: all lived on land, but lived near coast some. was he don sea, and preserved and down there.
