Spreading Boundary

Oceanic divergent plate boundaries. Oceanic ridges and oceanic trenches. The ridges are are zones where oceanic crust is emerging to the surface and is the source of sea floor spreading, and oceanic trenches form near continental margins wh... Read More »

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What occurs at plate boundaries that are associated with seafloor...

When seafloor spreading happens, a rift forms at the bottom of a ocean and separates to form new rock. This is an example of a divergent plate boundary Read More »

Source: http://wiki.answers.com/Q/What_occurs_at_plate_boundaries_that_ar...

What causes volcanoes to form at a spreading plate boundary?

As two plates spread apart from each other at the boundary, magma that was trapped below wells up between them. This magma can be released in the form of volcanoes or ooze out from rift valleys. Read More »

Source: http://wiki.answers.com/Q/What_causes_volcanoes_to_form_at_a_spre...

What forms when plates spread apart at a boundary?

divergent boundary and it either causes rift valleys or ridges Read More »

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What do spreading plate boundaries create?

They create new crust. Read More »

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What causes volcanoes to form at spreading boundaries?

Please make the question clearer. There are converging and diverging boundaries but not spreading boundaries. Plates move but don't spread. Please make the question clearer Read More »

Source: http://wiki.answers.com/Q/What_causes_volcanoes_to_form_at_spread...