GEOL 1066 Lecture 1: Geology 1066
Document Summary
Original: apatite is the mineral in bone. Taphonomy: science of the laws of burial, what happens from death to discovery. How a river meanders- point bar, cut bank, oxbow lakes. Biostratigraphy- understanding/studying of the rock layers by the fossils in it. Uniformitarianism the present is the key to the past . Basic principles of stratigraphy the study of layered rocks: superposition- in undisturbed strata, oldest at the bottom, youngest at top, original horizontal, original lateral continuity. Principles of cross cutting relationships, allows figuring out of a sequence of geologic events. Folding happens after layers were formed, from sediment build up. Absolute gives an age in years, relative refers to position in the sequence of life history. Relative is in reference with another time period. Radiometric dating: isotopes- have same number of protons and electrons but differ in neutrons and mass. radioactive- spontaneously emitting particles or energy by disintegration of nuclei. half life- time for half to decay.
