GEOLOGY

Detailed explanation-1: -Many rift valleys are part of “triple junctions, ” a type of divergent boundary where three tectonic plates meet at about 120° angles.

Detailed explanation-2: -Two major landforms that are created from divergent boundaries are the rift valleys and mid-oceanic ridges. A divergent boundary occurs when two tectonic plates move away or spread apart from each other.

Detailed explanation-3: -Divergent Boundaries As the plates separate along the boundary, the block between the faults cracks and drops down into the soft, plastic interior (the asthenosphere). The sinking of the block forms a central valley called a rift. Magma (liquid rock) seeps upward to fill the cracks.

Detailed explanation-4: -A rift valley is formed due to the subsidence of the floor of a river valley. On a divergent plate boundary, it is like a crustal expansion or spreading apart of the surface forms a rift valley, which is then further deepened by erosion pressures.