Review - Geology Test 3 Geological Time Geological time...

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Geology Test 3 Geological Time Geological time scale chart Eon Era Years (Millions) Period Phanerozoic Cenozoic 65 Quaternary Tertiary Mesozoic 248 Cretacious Jurassic Triassic Paleozoic 540 Permian Carboniferous Pennsylvanian Mississippian Devonian Silurian Ordovician Cambrian Precambrian Precambrian Proterozoic 540-2500 Archean 2500-3800 Hadean 3800-4500
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Radiometric Dating Be able to work problem (parent to daughter ratio) Closed system assumed, what if it wasn’t and daughter product escapes, what does that do to the calculated age. It would throw off the calculation Carbon 14 Dating Half life – 5,730 years Used for recent events When something dies it stops taking in carbon and starts taking in nitrogen C 12 :C 14 (Decreases because it turns into nitrogen) Various types of radiometric decay Atomic Number = Number of Protons Mass Number = Number of Protons + Neutrons Alpha Emissions – emits two protons and two neutrons Beta Emissions – electron ejected Electron Capture – electron captured by nucleus and combines with proton to
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This note was uploaded on 03/30/2008 for the course GEOL 101 taught by Professor Olinsky during the Spring '08 term at Texas A&M.

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Review - Geology Test 3 Geological Time Geological time...

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