GEOL 1066 Study Guide - Apatite, Mesozoic, Annelid
Document Summary
Our species has had around 5 million years. As the cause of a major extinction, humans can benefit from looking at extinction causes, results, and recoveries. An estimated 8-25% of all genera of dinosaurs that lived have been found as fossils. *fossil- remnant or trace of past life, naturally preserved in the earth"s crust* Preserves soft parts: freezing, pickling, mummification, distillation. Preserves hard parts: original- apatite is the mineral in bone, permineralization, recrystallization and replacement, casts and molds. Science of the laws of burial: what happens from death to discovery. Meandering river deposition: how a river meanders. Study of layers of rocks and fossils in the rocks. Basic principles of stratigraphy- the study of layered rocks: superposition- in undisturbed strata, oldest at bottom, youngest at top, original horizontality, original lateral continuity. Allows the figuring out of a sequence of geologic events. Absolute gives an age in years, relative refers to position in the sequence of life history.
