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12 Cards in this Set
- Front
- Back
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Lithosphere |
The rigid outer part of the earth, consisting of the crust and upper mantle. |
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Tectonic Plates |
The two sub-layers of the earth's crust that move, float, and sometimes fracture and whose interaction causes continental drift, earthquakes, volcanoes, mountains, and oceanic trenches. |
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Divergent Boundaries |
A linear feature that exists between two tectonic plates that are moving away from each other. |
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Convergent Boundaries |
An actively deforming region where two (or more) tectonic plates or fragments of the lithosphere move toward one another and collide. |
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Transform Boundary |
Since these faults neither create nor destroy lithosphere, is a type of fault whose relative motion is predominantly horizontal in either sinistral or dextral direction. |
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Convection Current |
A current in a fluid that results from convection. |
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Strata |
A layer or a series of layers of rock in the ground. |
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Pangea |
A super continent that existed during the late Paleozoic and early Mesozoic eras. It assembled from earlier continental units approximately 300 million years ago, and it began to break apart about 175 million years ago. |
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Theory of Continental Drift |
A theory stating that the Earth's continents have been joined together and have moved away from each other at different times in the Earth's history. The theory was first proposed by Alfred Wegener in 1912. |
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Faults |
(of a rock formation) be broken by a fault or faults. |
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Dip-Slip Fault |
It is caused by a combination of shearing and tension or compressional forces. Nearly all faults will have some component of both dip-slip and strike-slip, so defining a fault as oblique requires both dip and strike components to be measurable and significant. |
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Strike-Slip Fault |
A fault in which rock strata are displaced mainly in a horizontal direction, parallel to the line of the fault. |
