Definitions for rift zone
rift zone

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1. Rift zone

   A rift zone is a feature of some volcanoes, especially shield volcanoes, in which a set of linear cracks (or rifts) develops in a volcanic edifice, typically forming into two or three well-defined regions along the flanks of the vent. Believed to be primarily caused by internal and gravitational stresses generated by magma emplacement within and across various regions of the volcano, rift zones allow the intrusion of magmatic dykes into the slopes of the volcano itself. The addition of these magmatic materials usually contributes to the further rifting of the slope, in addition to generating fissure eruptions from those dykes that reach the surface. It is the grouping of these fissures, and the dykes that feed them, that serves to delineate where and whether a rift zone is to be defined. The accumulated lava of repeated eruptions from rift zones along with the endogenous growth created by magma intrusions causes these volcanoes to have an elongated shape. Perhaps the best example of this is Mauna Loa, which in Hawaiian means "long mountain", and which features two very well defined rift zones extending tens of kilometers outward from the central vent.

WikidataRate this definition:1.0 / 1 vote

1. Rift zone

   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 Puʻu ʻŌʻō 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. The accumulated lava of repeated eruptions from rift zones causes many Hawaiian volcanoes to have an elongated shape. Perhaps the best example of this is Mauna Loa, which in Hawaiian means "long mountain". The origin of the fractures that comprise the rift zones is spreading of the volcano. The more material a shield volcano accumulates, the heavier it gets, and it begins to settle due to the simple effects of gravity. The surface spreads and ruptures. The reason lava often erupts from the flanks of Hawaiian volcanoes is gravity: it is easier for liquid lava, which is heavy, to flow laterally out the sides of a mountain than to be pushed up an additional several hundred or several thousand meters in elevation to be erupted from the summit. These systems of fissures that make up a rift zone allow this to happen more easily.

How to pronounce rift zone?

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How to say rift zone in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of rift zone in Chaldean Numerology is: 3

2. Pythagorean Numerology

   The numerical value of rift zone in Pythagorean Numerology is: 5

Examples of rift zone in a Sentence

1. Ken Hon:

   All signs indicate that it will stay within the crater, we’re not seeing any indications that lava is moving into the lower part of the east rift zone where people live. Currently all the activity is within the park.

References

1. ^ Wikipedia
   https://en.wikipedia.org/wiki/Rift_Zone
2. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=rift zone