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20 Cards in this Set
- Front
- Back
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Principles of Relative Geologic Time
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1. Super Position: Older rocks are at the bottom, younger at the top. Can be used as a time frame.
2. Original Horizontality: Deposition of sediments occurs in horizontal beds 3. Cross-Cutting Relations: When he was showing us that picture thing and you know rocks are older than the fault if they are being cut by it. |
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Basic Time Line
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Eons Eras Periods Epochs
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What are the four eons?
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Hadean
Archaean Proterozoic Phanerozoic |
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Three Eras from notes?
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Cenozoic, Mesozoic, and Paleozoic
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Two Periods of Cenozoic Era
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Tertiary Period (Pleistocene Era)
Quaternary Period (Recent/Holocene Epoch) |
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Intrusive (igneous rock)
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Does not reach surfaces
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Extrusive (volcanic)
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Reaches surface
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Pluton
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Body of intrusive rock that has crystallized
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Two most abundant in continental crust
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Oxygen, Silcone (basis for most minerals)
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Metaphorisim
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Pre- existing rocks have been changed by heat and pressure
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Minerals
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Solid substances that are naturally occurring and inorganic
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What makes up rocks
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Chemical Composition
Crystalline Structure |
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Cleavage
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Density of Materials; The way the mineral breaks
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Confection
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in atmosphere. Rising hot air sinks.
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What are the spheres?
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lithosphere, hydrosphere, biosphere, and atmosphere.
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In what period were there a ton of fossils?
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Cambrian EXPLOSION
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What was found during the Paleozoic Era?
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Marine organisms with skeletons
1st Invertebrate 1st Vertebrates: FISH |
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Internal Heat Engine
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Radioactive Decay
Pressure itself (lithiopathic) rock/stone |
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External Heat Engine
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The Sun (important for plate tectonics)
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Index Fossil
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Occurs over broad area globally, but exists in a narrow time range. If you find this fossil, you can pinpoint the time.
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