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35 Cards in this Set
- Front
- Back
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Uniformitarianism
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The slow processes occurring today created the earth
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Charles Lyell
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Principles of Geology- relative age dating
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Lord Kelvin
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Calculated the age of the earth to be somewhere around 20 million years old from thermodynamics
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Who was the radioactive isotope guy to actual age earth
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Arthur Holmes
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Where did the very old meteorite hit on earth
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Canyon Diablo
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The oldest rock layer is
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3.4 bil
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Who is James Hutton?
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Guy who came up with uniformitarianism... Father of geology
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What is the maximum numberical age that can be calculated using radiocarbon dating?
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40,000
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What type of radioactive decay results in a change in atomic mass?
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Alpha
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Alpha decay
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- 2p and -2n
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Beta decay
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one neutron turns into a proton
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electron capture
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proton becomes a neutron
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Hadean
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Fire earth
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Archean
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bacteria life
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Proterozoic
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early life- oxygen from algae
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Phanerozoic
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Visible life
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Paleozoic era
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old modern life
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mesozoic era
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mid modern life
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cenozoic era
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current era
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first ocean was how long ago
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4 bil
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continents came
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3 bil
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oxygen introduced
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2.5 bil years
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snowball earth
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1 bil
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cambrian explosion
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500 million
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Coal from terrestrial swamps
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300 million years
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mass extinction from warming
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251 million years ago
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mass extinction from cooling
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65 million years ago
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units of time
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eons-eras-periods-epochs
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our current time
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phaneroic-cenozoic-quaternary-halocene
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Eons in order
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hadean, archean, proterozoic, phaneroic
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3 most recent eras
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paleozoic mesozoic, cenozoic
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Disconformity
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Erosional Unconformity
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Angular Unconformity
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Underlying layers are tilted relative to overlying layers, represents missing time due to tectonic event.
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Nonconformity
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Contact between eroded igneous or metamorphic rock layers and overlying sedimentary rocks.
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Archbishop
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James Usher
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