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A rift valley forms at a divergent boundary. When plates diverge, the crust in between them is pulled thin. This tension creates a rift valley, such as the one found between the two islands of New Zealand. Over time, the stretched crust with grow so thin that rising magma will break its surface, forming an underwater ridge.

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14y ago
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11y ago

a constructive boundry ( plates pulling apart )

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9y ago

Mid-ocean ridges and rift valleys are divergent boundaries.

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10y ago

divergent boundary

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13y ago

Divergent Plate Boundaries

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Q: What kind of boundary are mid-ocean ridges and rift valleys?
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