Chapter 12 Time and How Old Earth Is

Chapter 12 Time and How Old Earth Is - Chapter 12: Time and...

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Geologcal Time Scale How old rocs are in relation to one another Determines sequence of events Relative dating : (qualitative appreciation of time) Principle of Superposition (The basis to "Relative Dating Methods" Strata: layers of rock or sediment Stratigraphy: describing layers of rock or sediment Law of superposition: On bottom of strata are the oldest; top is newest Stratigraphy: Fossil Assemblage: group of fossils from a certain layer Principle of fossil succession: fossil assemblages at the bottom are older than those on top Biostratigraphy: strata and fossil assemblages can be integrated to determine relative dating Fossil Succession Evolutionary events and Fossils: mammals (cenozoic), dinosaurs (mesozoic), fish (paleozoic), no vertebrates [no backbone] or tetrapods [not with four limbs] (precambrian) Relative dating (qualitative appreciation of time): how old rocks are in relation to one another; determines sequence of events
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Chapter 12 Time and How Old Earth Is - Chapter 12: Time and...

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