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* Magmatism creates new crust along continental margins and as island arcs such as with the subduction of the Juan de Fuca plate under the North American plate continues to add material to the crust in the Cascade Range. * Accretion of pieces of crust such as island arcs and sea mounts with existing large continents. As plate movements subduct plates, the subducted plates bring with it land masses that if sufficiently buoyant can collide and merge with the larger continent.
Wiki User
∙ 16y ago
Wiki User
∙ 12y agoContinents aren't made, their titonic plates shift, resulting in growing continents/ however, this takes millons of years. Millions of years ago, there was only 3 continents. The bigggest one was called pangea.
Wiki User
∙ 8y agothe plates moving the earth
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The above answer is INCORRECT the plates move the continents around but do not make them GROW.
Continents only grow very (VERY) slowly as the processes of volcanology and erosion slowly bring lighter minerals from the mantle to the surface and leave them there.
The continents separated out very early in Earths history when it was still all molten and they represent the thin "scum" of light minerals that floated to the the surface of the melt.
Wiki User
∙ 11y agoExponding lava fields
Lowering sea level
Wiki User
∙ 12y agoPeewee.
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What two continents are west of South America?
What two continents are west of south america?
