ANTH 204 Lecture Notes - Lecture 4: Radionuclide, Isotopes Of Nitrogen, Biostratigraphy
20 Sep 2016
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Document Summary
The time of the earth, broken into stages and eras. Relative dating: determining age of event in relation to other events, stratigraphy, biostratigraphy, seriation, old, older, oldest/ young, younger, youngest. Chronometric dating: determining age of an event in an age in-years time scale, dendrochronology, radiocarbon, radiopotassium, esr, osl, u-series. Lower layers are older than upper layers duh: as one goes up the profile, the strata becomes younger. Biostratigraphy: relative dating of sediments or archaeological sites ball others on the presence of distinctive, time-sensitive fossils. Seriation: ordering of artifact styles through time, items more similar to each other are placed adjacent to each other in a chronological sequence, principle of artifact succession: Artifact types found in different strata can differ though time, assuming behaviors have changed through time. Radiometric techniques: chronometric techniques relying on measurable decay of radioactive isotopes, half-life: measure of time required for half of the radioactive isotopes in a sample to decay to stable isotopes.
