B151xF07_L04EarthHistory - Georgia Tech School of Biology...

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Biology 1510/1511 Georgia Tech School of Biology Fall 2006 Earth History Major divisions of time Dating methods Stratigraphy and paleomagnetism Continental movement Oxygen in Earth history Web Resources UC Museum of Paleontology Historical Geology site at GPC
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Biology 1510/1511 Georgia Tech School of Biology Fall 2006 Geological Time Scale Campbell & Reece, Fig. 26.10 & Tbl. 26.1
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Biology 1510/1511 Georgia Tech School of Biology Fall 2006 Radioactive Decay and Dating Decay of a radioisotope N = N o e - λ t λ = decay constant N = # atoms present Half life Definition: time required for half the atoms initially present to decay. – T (half life) = 0.693/ λ
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Biology 1510/1511 Georgia Tech School of Biology Fall 2006 Radioactive Decay Campbell & Reece, Fig. 26.07
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Biology 1510/1511 Georgia Tech School of Biology Fall 2006 14 C Dating 14 C is an important dating tool for organic matter formed in the recent past Half life = 5700 yr 14 C is continually formed by cosmic ray
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This note was uploaded on 04/07/2008 for the course BIO 1510 taught by Professor Unknown during the Fall '07 term at Georgia Institute of Technology.

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B151xF07_L04EarthHistory - Georgia Tech School of Biology...

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