Flashcards
Geologic Plate Tectonics
Cards in this deck (15)
- 1Mid-Ocean RidgesAn underwater mountain range formed when the mantle heats below the ocean floor and forces the crust to rise
- 2Subduction ZoneMark the collision between the tectonic plates as they have moved across the surface of the earth and will continue to do so
- 3Continental DriftAlfred Wagner proposed that continents are not assembled in the same way throughout time. Fossils are evidence of this idea
- 4Paradigm ShiftThe concept that earth's magnetic field shifts and is best explained by the seafloor spreading and and the magnetic evidence in igneous rocks—it was a fundamental change in basic disciplines of geology
- 5Plate BoundaryThree types of plate boundary include divergent, convergent and transforming
- 6Oceanic LithosphereNew oceanic lithosphere is created at divergent boundaries and old oceanic lithosphere is recycled at convergent boundaries
- 7Mantle PlumeAn upwelling blob of hot material that comes from the low mantle and can generate a chain of volcanic islands. The plume is stationary in the lower mantle
- 8CoreThe iron mass at Earth's centre that has an inner solid part and an outer liquid part
- 9MantleThe thickest layers of the Earth that are made of dense, hard, rock. Lies directly beneath the crust
- 10CrustThe outermost and thinnest layer of the earth that is less dense and brittle rock
- 11Inner CoreThought to be the innermost part of the earth composed of solid metal alloys at 5000 degrees C
- 12Divergent Plate BoundaryCreated by mid ocean ridges, that could be forming today
- 13Convergent Plate BoundaryOceanic continent always sub-ducts beneath a continent,but lithospheric continents do not want to subduct because they are too buoyant
- 14Transform Plate BoundaryWhen two plates slide past each other and form earthquakes. It commonly connects two mid-oceanic segments and can occur in the middle of the ocean with inactive zones
- 15Rifting ProcessThe process of forming new divergent boundaries