Some Review Plate Tectonics Theory: The lithosphere (crust + solid uppermost man

Question

Some Review Plate Tectonics Theory: The lithosphere (crust + solid uppermost mantle) is fractured into approximately 12 lithosphere plates (tectonic plates), which are in motion relative to each other. The plates interact at their boundaries (outer edges). These interactions result in most of the major geological features on the planet, such as volcanoes, mountain ranges, earthquakes, ocean trenches, sea floor spreading zones and mid-ocean ridges. __________________________________________________________________________________ There are 3 basic types of plate boundary interactions: 1) Divergent plate boundaries (plates move apart from each other); ````` Results: Sea floor spreading zone, mid-ocean ridge, earthquakes, volcanoes and hydrothermal vents (Sea water seeps down rock fractures where it is heated by magma and returns to the sea floor as hot springs). 2) Convergent plate boundaries (two plates move toward each other): a. Ocean-continent plate convergence: Results in subduction of the ocean plate (denser), volcanoes on the adjacent (non-subducting) plate, ocean trench and earthquakes. b. Ocean-ocean plate convergence: Results in subduction of one of the ocean plates, island arc (volcanoes on the non-subducting plate), ocean trench and Earthquakes. c. Continent-continent plate convergence: Results in smashup rather than subduction, mountain building and earthquakes but no volcanoes (no subduction). 3) Transform plate boundaries (plates move past one another in opposite directions) Result: Earthquakes, no mountains (usually) and no volcanoes. 4. Aleutian Islands are located parallel to the Aleutian Trench which is the result of Pacific Plate subduction beneath the North American Plate in the North Pacific Ocean. On which plate are the Aleutian Islands located? a) Pacific Plate b) North American Plate c) Cannot be determined

Explanation / Answer

4) answer : a) Pacipic plate

explanation : When two one continental and one oceanic plates converge each other island arcs are formed on the subductind oceanic plate and volcanos or formed on non subducting continental plate. The convergent boudery between Pacipic and North american plates have marked features of Aleutian Islands located on pacipic plate occupie an area of 6,821 km2.

Related Questions

Navigate

• Browse (All)
• Browse S
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.