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De Lightning Ridge, 8/2/08, Lightning Ridge Plate, 2YO Open
Ridge Plate

Using plate tectonic theory, explain the formation and dynamics of a mid-ocean ridge.?
Include in your answer a discussion of:
- seawater/mid-oceanic ridge interactions
- the shape and other physical features of the ridge
- plate tectonic processes at the ridge
- examples of the specific scientific evidence for the process of continental drift (describe at least two, and why they confrim continental drift)
Well through paleomagnetism we have convection currents throughout our Earth's core and mantel. As the convection comes out and moves outward the plates slide apart (divergent plate boundaries are made this way) when this happens the plates slide apart causing ripples or ridges (shape physical feature) on both sides of the boundary. The middle is being replaced by new rock. The ancient crust will eventually be subducted underneath continental crust. This is how continental volcanism happens.
There is a lot of evidence of Continental drift. First major one is that, not so much the coastlines, but the Continental shelves fit like puzzle pieces. The mid-ocean ridges also take on the shape of the two pieces separating. Look at the Mid-Atlantic Ridge. Look how Africa and South America use to fit http://en.wikipedia.org/wiki/Image:World_Distribution_of_Mid-Oceanic_Ridges.gif. Another piece of evidence is the same fossils of certain species have been found both Africa and South America and other continents that were once connected. Finally look at some of the mountain ranges they also connect to the mountain ranges of other continents almost perfectly minus the erosion and weathering they would fit exactly.
Tectonic Plates and the Arctic's Gakkel Ridge
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Tags: iceland, mid-atlantic ridge plate boundary, photography, photos, plate_tectonics, ridge plate, roof ridge plate, volcano


US $625.00




















































































