Term
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Definition
| Achean and Proterozoic, Life began, great volcanic activity. |
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| Life began(marine), stromatolites dominant |
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| Second period of cenozoic (we live in it), Hominids develop and humans dominant, Ice age |
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Term
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Definition
| type of fossil, fossil replace w/ something else. Ex. petrified wood |
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Term
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Definition
| 3rd period of paleozoic, first land animals(spiders, scorpions), marine invertebrates thrive. |
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Term
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Definition
| markings left in rock(no specimen). Ex. footprints. |
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Definition
| 1st period in Mesozoic, reptiles thrive, dinosaurs appear. |
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Term
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Definition
| Finds exact "date" or age of artifact. |
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Term
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Definition
| Nuclide remaining after radioactive "parent" nuclide decays. Stable. |
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Term
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Definition
| Graph that shows ratio of parent nuclides to daughter nuclides. |
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Term
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Definition
| Unstable radioactive nuclide that decays to stable, "daughter" nuclide. |
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Term
| Radioactive (radiometric) dating= |
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Definition
| Dating technique that measures ratio of parent nuclides to daughter nuclides to figure out age. Uses Potassium-Argon, Rubidium-Strontium, Uranium-Lead. |
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Term
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Definition
| Radiometric dating that uses Carbon-14. |
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Term
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Definition
| Atom with unstable nucleus. Used in Radiometric dating. |
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Term
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Definition
| Finding age of object relative to another (not to specific age). |
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Term
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Definition
| Transition between lungfish and reptile. Appeared in Devonian and thrived in Mississippian and Pennsylvanian. |
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Term
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Definition
| Flowering plant. Appeared in Cretaceous and Thrived in Paleogene. |
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Term
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Definition
| Appeared as segmented worms in Proterozoic. Ex. TRILOBITES |
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Term
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Definition
| Phylum Brachiopoda. In cludes Mucrospirifer, Platystrophia, and Atrypa. Thrived during Paleozoic. Moved by connecting itself to things using fleshy arm-foot. |
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Term
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Definition
| Phylum Mollusca. Thrived in Ordovician and Silurian. Moved by Jet propulsion. Living relatives=squid, octopus. |
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Term
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Definition
| Phylum including Corals. Thrived mostly in Cambrian. |
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Term
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Definition
| Phylum Cnidaria. Thrived/appeared in Cambrian. Ex. PETOSKY STONE and FAVOSITES |
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Term
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Definition
| Phylum Echinodermata. Thrived in Orodvician. Sessile. Ex. SEA LILY |
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Term
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Definition
| Reptiles appearing in Triassic. Had specialized hips and ankle so they were fast and coulod walk on 2 feet. Did well in dry climates b/c they conserved water. |
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Definition
| Phylum including SEA LILIES. |
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Term
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Definition
| Link between marine invertebrates and lungfish. First vertebrates. Appeared in Cambrian.Thrived in Devonian. |
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Term
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Definition
| Phylum Mollusca. Began in Proterozoic. Moved like snail. |
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Term
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Definition
| Seed-bearing plants. Appeared in Devonian. Thrived in Mississippian. |
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Term
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Definition
| Appeared in Jurassic. Thrived in Cenozoic. |
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Term
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Definition
| Phylum. Ranges from octopus to snails and clams. |
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Term
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Definition
| Phylum Mollusca. Thrived in Mississippian. Living relatives=scallops, clams, oysters. Moved by pulling itself around with hatchet-shaped muscle. |
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Term
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Definition
| Colony coral. Phylum Cnidaria. Thrived in Cambrian. |
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Term
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Definition
| Link between amphibians and mammals. Thrived in Mesozoic. |
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Term
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Definition
| Phylum Cnidaria. Shaped like Horn (i.e. horn coral). Thrived in ordovician. |
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Term
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Definition
| Fossil of blue-green algae. Dominat in Proterozoic. |
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Term
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Definition
| Phylum Arthropoda. Dominant Cambrian+Orodvician. Died out Permian. Good Index Fossil. |
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Term
| 3 things needed for index fossil: |
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Definition
| 1. Be extinct. 2. Short-lived. 3. Not common. |
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Term
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Definition
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Term
| Convection currents rising=? falling=? |
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Definition
| Rising=diverging plates Falling=converging. |
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Term
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Definition
| Long dry periods, very shot wet periods. |
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Term
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Definition
| Very hot and wet, no ice caps. |
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Term
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Definition
| Rainforesty, but not as much as jurassic. |
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Term
| Major geologic movement during jurassic= |
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Definition
| Gondwana and Laurasia split. |
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Term
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Definition
| Came up with theory for continental drift. |
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Term
| In sequence of sedimentary rocks with coarsest at bottom, sea levels must have_______. |
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Definition
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Term
| In sequence of sedimentary rocks with finest at bottom, sea levels must have_______. |
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Definition
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