Dating MethodsCarbon-14 DatingPotassium- Argon DatingArchaeomagnetic DatingArchaeology MethodsStratigraphy: Stratigraphic ProfileANTY 101D 1st Edition Lecture 31 Dating Methods Carbon-14 Dating-Absolute dating• Death of organic remains• C-14 intake -Decays after death -C-12 stable • Ratio of C14 to C12• Half life= 5730 years• AD 1,500-40,000 BP• Date range + or - so many years Potassium- Argon Dating -Volcanic layer to read ( rock, clay, mineral, deposit) • K decays from Ar (similar to C14)• Half-life = 1.3 billion years• 100,000 years or olderThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.• East Africa (Lucy) Olduria Archaeomagnetic Dating -Magnestic fields shift • Earth’s polarity • Iron particles heated, then they line up and point to magnetic pole (N)• Burnt clay fixed and Unmoved • Regional master curves• Up to 10,000 years old Archaeology Methods -Survey—> Sampling strategy—> Complete vs. Random v. Judgement -Excavation —> horizontal grid —> datum point (groundzero); permanent • Vertical depth • Stratum or layer• Provenience/context-Where it is in relation to place-Recording data; preserve context Stratigraphy: Stratigraphic Profile -Ancestral Puebloan “Small House” • Cross section view-Shows flat floors -rooms slanted rocks from
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