INTEGBI N33 Lecture Notes - Lecture 8: Principle Of Faunal Succession, Biostratigraphy, Uniformitarianism
31 Mar 2018
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Document Summary
Dating things in relative to other things. The placing of an event in a time sequence without regard to absolute age in years. Principles of superposition, uniformitarianism, and faunal succession. "b is younger than a" but don"t know exact date. Using fossils of known age to date fossils whose age we don"t know. Actual age, expressed in years, of a geological material or event. A method for determining the age of an object containing organic material by using radiocarbon. Isn"t useful past 30,000-35,000 years (great for modern archaeology but not for dinosaurs/paleontology) However fossils not usually in igneous rocks. Magma may contain radioactive elements that always decay at the same rate and to the same stable product. Older rocks have more of the daughter products because they decayed more. Unstable form = parent product (original isotope) Stable form = daughter product (decayed isotope)
