A zone of volcanic features associated with underlying dikes. The location of the rift is marked by cracks, faults, and vents.
A region of Earth's crust along which divergence is taking place. A linear zone of volcanic activity and faulting usually associated with diverging plates or crustal stretching.
an area where the earth's crust is spreading - has a downdropped central area and upthrown sides
area on continents where a trough bounded by normal faults is forming; the site of crustal extension, similar to that which occurs at mid-oceanic ridges.
long narrow fractures in the crust found along ocean floor or on land, from which lava flows out; often associated with spreading centers from which tectonic plates are diverging, such as the mid-Atlantic Ridge.
Elongate tapering ridges radiating from summit calderas and extend down volcano flanks into the sea. Fissures, pit craters, cinder and spatter cones, and small volcanic shield delineate the rift axis. Orientation of rift zones influenced by gravitational stresses and buttressing effects of pre-existing neighboring volcanoes (e.g., Kilauea volcano is buttressed against Mauna Loa). During rift or flank eruptions or intrusions, the summit usually deflates as magma moves into the rift zone accompanied by earthquake swarms map the magma movement.
a large area of the earth in which a rift occurs when plates of the earth's crust move away from one another. [AHDOS
A rift zone is a feature of some volcanoes, especially the shield volcanoes of Hawaii, in which a linear series of fissures in the volcanic edifice allows lava to be erupted from the volcano's flank instead of from its summit. For example, in the currently ongoing eruption of Kilauea lava is emitted continuously from the PuÊ»u Ê»ÅŒÊ»Å vent located in Kilauea's East Rift Zone roughly 15 km east of Kilauea Crater. Rift zones tend to extend for tens of kilometers radially outward from the volcanic summit; most Hawaiian volcanoes have two or sometimes three of them.