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. 5a. The deepest place on the ocean floor is the Mariana Trench, which is located at the boundary of the Pacific Plate and the Philippine Plate. The trench is the result of what type of plate boundary interaction? 5b. Mariana Islands are an island arc found near the Mariana Trench. This long line of volcanic islands is the result of a plate boundary interaction. On which plate are these islands located?

Explanation / Answer

5a ) trench is the result of convergence of two tectonic plates . When ever Pacific plate subduct beneath the Philippine plate , mariana trench results.

5b) mariana islands are located on Philippine plate

Related Questions

Navigate

• Browse (All)
• Browse S
• Subjects

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