Divergent Boundary: the boundary between tectonic plates that are moving away from each other.
Examples: Mid-Atlantic Ridge
Examples: Mid-Atlantic Ridge
Rift valleys: a subsea chasm extending along the crest of a mid-ocean ridge, locus of the magma upwellings that accompany seafloor spreading.
Example: the Rhine Rift Valley (Germany).
Example: the Rhine Rift Valley (Germany).