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Plate Tectonic Theory. “Plate Facts". Earth's surface consists of rigid plates. These plates move laterally and interact with each other at plate boundaries. . Most geologic activity observed on Earth happens at these boundaries. .. Plate — what is it? A large slab of rock that moves as a unit on the earth's surface. Depth-Wise
1) There are two basic types of lithosphere, CONTINENTAL and. OCEANIC. Continental lithosphere is made of relatively light-weight minerals, so it has a low density. Oceanic lithosphere is more dense than continental lithosphere because it is composed of heavier minerals. A single plate may be partly oceanic and partly
Continental Drift. Seafloor Spreading. Plate Tectonics. Divergent Plate Boundaries. Convergent Plate Boundaries. Transform Plate Boundaries. Summary. This curious world we inhabit is more wonderful than convenient; more beautiful than it is useful; it is more to be admired and enjoyed than used. Henry David Thoreau
The global mosaic of plates periodically reorganizes itself and new plate boundaries form while others close up. Plate tectonics, the study of such relative motions and their consequences, allows relating surface, geological and geophysical structures with quantified movements attributed to deep processes of the Earth's
26 Aug 2015 Physical Geology. Tulane University. Prof. Stephen A. Nelson. Continental Drift, Sea Floor Spreading and Plate Tectonics. Plate Tectonics is a theory developed in the late 1960s, to explain how the outer layers of the. Earth move and deform. The theory has caused a revolution in the way we think about the.
Partial melt. Plate Tectonics. Plate tectonics theory describes how the lithosphere of the. Earth is broken into various plates. These plates drift on the asthenosphere at very slow rates. As plates move away from each other the lithosphere thins and tears. At these divergent plate boundaries new oceanic lithosphere is created
The crust is broken into plates that move. – Lithosphere is divided into plates that slide around on top of the slowly moving mesosphere (tectonic plates). – It occurred after the break-up of Pangaea, and since then the continents have drifted apart. The pictures show Continental Drift theory from 225 million years to present.
uring the 19605 our concepts of the architecmre of the earth's own and how the earth “works" were completely revolutiomzed by the theory of plate tectonics {Greek :ektomkos, “builder"}. The theory maintains that the lithosphere, the outer rocky shell of the earth, consists of a number of rigid plates, 70-150 km. (40—90 mi)
In this chapter, you will learn about one of the most important discoveries of the 20th century—plate tectonics. You have already learned about Earth's surface and that it is covered with a lithosphere that is broken into pieces called. “plates." Plate tectonics is the study of the movement of these plates. It is a relatively new field
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