GEOL 1003 Lecture : Ch6 Correlation Dating With Notes
Document Summary
Useful for dating because they evolved rapidly, but died around 65ma. Relative age dating: qualitative, relative ages, techniques, steno"s principles. Earth"s history interpretation problem: rocks must be in contact with each other; no one location has all rocks deposited through all of time. Relative age dating: techniques (cont. , smith, fossil succession. Relative age dating: cuvier, species become extinct; biota replaced by other. Absolute age: absolute dating, quantitative, numerical value for an age. Relative first and last occurrences in strata: geologic systems of rock contain specific fossils. Can"t objectively confuse cambrian rocks for ordovician rocks because the fossils are different. Geologic time scale: development, geologic systems defined based on their distinctive type of sedimentary rock. Correlation: stratigraphy = study of stratified rock, geometric arrangement of sedimentary beds, composition, mode of origin, age (via fossils; relative dating or absolute dating, stratigraphic units = small- to large-scale units.
