[DOC] [TLE] Definitions | Volcano World | Oregon State University [PAR] A turbulent mixture of gas and rock fragments, most of which are ash -sized ... 
Volcanic ash that has fallen through the air from an eruption cloud . ... A central 
vent is an opening at the Earth's surface of a volcanic conduit of ... A row of 
coalescing lava fountains along a fissure; a typical feature of a Hawaiian-type 
eruption. d. [DOC] [TLE] Volcano - examples, body, used, water, process, Earth, life, plants [PAR] A volcano is a hole in Earth's surface through which magma (called lava when it 
reaches Earth's surface), hot gases, ash, and rock fragments escape from .... A 
Vulcanian phase occurs when a magma plug has blocked the volcanic vent. ... 
The size and shape of a volcano is dependent on the history and type of its 
eruptions. [DOC] [TLE] Volcanoes: The Nature of Volcanoes [PAR] Oct 12, 1999 ... Instead, volcanoes are built by the accumulation of their own eruptive products -- lava, bombs (crusted over ash flows, and tephra (airborne ash and dust). ... Molten rock below the surface of the Earth that rises in volcanic vents is known as magma, but after it erupts from a volcano it is called lava. [DOC] [TLE] Volcanoes, Magma, and Volcanic Eruptions - Tulane University [PAR] Sep 14, 2015 ... At depth in the Earth nearly all magmas contain gas dissolved in the liquid, but 
the ... Magma Type, Solidified Rock, Chemical Composition, Temperature ... there 
is range of temperature range over which partial melting occurs. ..... Sometimes 
lava flows erupt from vents low on the flanks of the small cones. [DOC] [TLE] volcanoes [PAR] A volcano begins as magma, melted rock inside the earth, Magma results from ... 
then erupt through this vent The materials gradually pile up around the vent, 
forming a ... Tephra includes, from smallest to largest, volcanic dust, volcanic ash 
and ... of the volcano and the type of material they are made of: 1) shield 
volcanoes,... [DOC] [TLE] volcano - Lava, gas, and other hazards | geology | Britannica.com [PAR] Sep 26, 2016 ... Vent in the crust of the Earth or another planet or satellite, from which ... Molten 
rock that reaches the surface is called lava. ... Common types of volcanic rock ... 
of a volcanic cone fails, as happened at Mount St. Helens in the United ... flow 
can pour over the lip of an erupting vent, or it may form when an ash... [DOC] [TLE] Geology Dictionary - Volcanic Ash, Bomb, Neck - GEOLOGY.COM [PAR] Water that exists in the pore spaces of a rock or soil within the vadose zone (
between the ... A glacier that occurs in a mountainous region and occupies a 
valley. .... Magma and gas travel upwards through this conduit to produce a 
volcanic eruption. ... A vent in Earth's surface through which molten rock and 
gases escape. [DOC] [TLE] Volcanism Volcanic Ash: Volcanism - GOES-R [PAR] It discusses four types of volcanic eruptions and describes six major volcanic 
hazards  tephra, pyroclastic flow, lahar, lava flow, volcanic gas, ... The rupture 
in the Earth's crust through which magma, volcanic gases and ..... Lava flows are 
masses of molten rock that pour onto the Earth's surface during an effusive 
eruption. [DOC] [TLE] The Nature of Volcanoes - Infoplease [PAR] If so, an eruption begins, and the molten rock may pour from the vent as ... around 
the vent, and accumulations of fall-back fragments may move downslope as ash 
... Molten rock below the surface of Earth that rises in volcanic vents is known as 
... The violent separation of gas from lava may produce rock froth called pumice. [DOC] [TLE] Glossary - Guide to Stratovolcanoes [PAR] Ash: Volcanic ash consists of tiny jagged particles of rock and natural glass ... 
Blast: An explosive eruption producing clouds of hot ash and/or other volcanic 
material. .... This gas is formed when an electrical discharge passes through the 
air. .... Volcano: A vent in Earth's crust through which molten or

Question: This type of eruption happens when molten rock, gas & ash pour through a vent in the earth
Answer: a volcano