Description of oceanic-oceanic subduction

Answer 1

Occurs when ocean crust sinks under continental crust, it sinks because it's colder and denser,at these sites, deep-ocean trenches also form along with coastal mountains. As the oceanic crust moves, these trenches often causes underwater earthquake, as the crust sinks under a continent, the crust buckles to form a range of mountains, like island arcs, parallel to a deep-ocean trench. Some of the mountains are volcanoes, which form as melted oceaninc crust rises through the top plate.

For example: Cascade Mountains in Oregon and Washington.

Answer 2

One case of an oceanic-continental subduction zone can be found off the coast of North America, stretching from northern California to British Columbia. Here, the small Juan de Fuca Plate, which is entirely oceanic crust, is subducting under the continental North American Plate. This subduction has led to the formation of the Cascades and the volcanoes of the Pacific Northwest.

Answer 3

Oceanic subduction is a plate with oceanic crust sinking under another plate with oceanic crust.

Answer 4

Ocean crust is forced under continental crust because the former (ocean) is denser than the latter (continental). Much the same effect occurs when cold air is forced under hot air.

Answer 5

The sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate.

Answer 6

Wish i knew.... :(