GEOL 2207 Lecture Notes - Permian, Mesozoic, Principle Of Faunal Succession
Document Summary
Extinctions: concept of a biosphere, understand the concept of a biosphere and earth system science and that the biosphere has evolved over time. Thin layer of life on the earth s surface, composed of ecosystems. Study of the layers of rock (stratigraphy: strata: layers of sedimentary rocks or lava flows) Superposition: in layered strata (sedimentary rocks or lava flows) Original horizontality: if it is tilted or folded, it was originally flat. Cross cutting relationships: unconformity = a period of non deposition or active erosion. Strata of like age can be dated and correlated by the fossils they contain. Only works because species have changed through time; evolution. Amount of time a species exist: a fossil range: recognize the qualities that make fossils useful in biostratigraphy. Lived in environments where fossilization is likely to occur. Fossil range = the amount of time a species exists (from evolution to extinction) Extinction events: end of cretaceous, late triassic, permo/triassic, late devonian, late.
