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13 Cards in this Set
- Front
- Back
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Index Fossils |
A fossil that is useful for dating and correlating the strata in which it is found. |
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Sedimentary Rock |
They are types of rock that are formed by the deposition and subsequent cementation of that material at the Earth's surface and within bodies of water. |
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Metamorphic Rock |
Is a type of rock which has been changed by extreme heat and pressure. |
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Igneous Rock |
Its one of the three main rock types, the others being sedimentary and metamorphic. |
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Relative Dating |
Relative dating is the science of determining the relative order of past events, without necessarily determining their absolute age. |
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Absolute Dating |
Absolute dating is the process of determining an age on a specified time scale in archaeology and geology. |
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Geologic Time |
The geological time scale is a system of chronological measurement that relates stratigraphy to time, and is used by geologists, paleontologists |
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Carbon Dating |
The determination of the age or date of organic matter from the relative proportions of the carbon isotopes carbon-12 and carbon-14 that it contains. The ratio between them changes as radioactive carbon-14 decays and is not replaced by exchange with the atmosphere. |
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Uranium Dating |
Uranium-series disequilibrium dating or uranium-series dating, is a radiometric dating technique commonly used to determine the age of calcium carbonate materials such as speleologist or coral. |
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Law of superposition |
Stating that in any undisturbed sequence of rocks deposited in layers, the youngest layer is on top and the oldest on bottom, each layer being younger than the one beneath it and older than the one above it. |
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Fault |
Its a planar fracture or discontinuity in a volume of rock, across which there has been significant displacement as a result of rock mass movement. |
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Ice Cores |
Its a core sample that is typically removed from an ice sheet, most commonly from the polar ice caps of Antarctica, Greenland or from high mountain glaciers elsewhere. |
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Theory Of Continental Drift |
A term, no longer used by geologists, that refers to the fact that continents are not stationary, but move across the Earth's surface. Continental drift is one feature of the modern theory of plate tectonics. |
