What is the difference between magma and lava yahoo answers

Study guides. Physics 20 cards. Which term explains whether an object's velocity has increased or decreased over time. Which of these is a characteristic of nonmetals. What is the only factor needed to calculate change in velocity due to acceleration of gravity 9.

What term is used to describe splitting a large atomic nucleus into two smaller ones. What angle is between 90 and What condition has symptoms that include ringing buzzing or roaring in the ears or head. What is the transfer of energy as electromagnetic waves called. V-cube 7 or megaminx. Causes of fires. Q: What would be the viscosity of magma if it results in pyroclastic flow? Write your answer Related questions. Is ultramafic magma high in viscosity? The magma with the highest viscosity would have?

What are the factors that determine the shape of a volcano? What is the silica content of magma that would result in a pyroclastic flow? Would the typemagma mean the Eyjafjallajokull Volcano has high medium or low in viscosity? What are some physical properties of magma from an explosive eruption?

What volcano that is the product of gas-rich basaltic magma mostly in the form of loose pyroclastic material? Which volcanic material would most likely be produced by a violent eruption? What is the viscosity definitions? How would you define viscosity - index? What kind of eruption would a pyroclastic flow most likely be? Pyroclastic flow would be most likely in a eruption.? Pyroclastic flow would most likely be in what kind of eruption? Can we use the heat from Yellowstone for energy?

Geothermal energy heat energy from the Earth's interior , is used to generate electricity in a variety of places throughout the world. Although Yellowstone National Park and its surroundings are a significant geothermal resource, the Park itself is off limits to development.

Geothermal developments often cause a decrease in the flow of nearby hot Can we drill into Yellowstone to stop it from erupting? In some cases, limited scientific drilling for research can help us understand magmatic and hydrothermal hot water systems; however, drilling to mitigate a volcanic threat is a much different subject with unknown consequences, high costs, and severe environmental impacts. In addition to the enormous expense and technological difficulties in How can we tell when a volcano will erupt?

Most volcanoes provide warnings before an eruption. Magmatic eruptions involve the rise of magma toward the surface, which normally generates detectable earthquakes.

It can also deform the ground surface and cause anomalous heat flow or changes in the temperature and chemistry of the groundwater and spring waters. Steam-blast eruptions, however, What is the difference between "magma" and "lava"? Scientists use the term magma for molten rock that is underground and lava for molten rock that breaks through the Earth's surface. Can an eruption at one volcano trigger an eruption at another volcano?

There are a few historic examples of simultaneous eruptions from volcanoes or volcanic vents located within about 10 kilometers 6 miles of each other, but it's difficult to Filter Total Items: 4. Pat; Lowenstern, Jacob B.

View Citation. Morgan, L. Pyroclastic flow at Mount St. Helens, Washington, August 7, Steam blast phreatic eruption from the summit crater of Mount St. Helens, Washington, on April 6, Large boulder carried downstream by lahars from the May 18, Mount St. Helens eruption. Debris avalanche deposit from the May 18, eruption of Mount St. Helens, Washington. Seismic record showing a swarm of volcano-tectonic earthquakes at Little Sitkin volcano, Alaska, August 30, Gas plume at Kilauea volcano, Hawaii, June These same range of ages of 2.

The Jos Plateau basalts vary in composition from basalt proper to trachyandesitic varieties of alkaline basalt magma series and some tholeiitic affinity [ 2 ].

Contrarily to the general notion that volcanoes are only associated with plate margins alone, the volcanoes in Nigeria are emplaced within the continent, associated with mantle Hot Spots. Records of gas emissions at Lakes Monoun and Nyos in Cameroon Republic in and respectively destroyed lives and properties within 14 km radius to a large extent, affected some communities in Nigeria Mambilla Plateau and Katsina-Ala River banks [ 3 ]. This research attempts to provide answers as to whether it is possible that the dormant volcanoes in Nigeria with no recorded history of eruption could roar back to life?

Some reported successive minor volcanic activities within the Cameroon Volcanic Line CVL , , , and are pointers to the possibility of the reactivation of some dormant volcanoes in Nigeria.

An understanding of the geology is important in studying natural hazards related to volcanism because the geology influences tectonic movement which leads to the disequilibrium of the ecosystem and other environmental components. The volcanic provinces are characterized by numerous volcanic cones and lava flows consisting of alkaline olivine basalts together with less important trachyte and phonolite intrusive rocks [ 5 ].

Apparently, the large volcanic province of Nigeria suggests that volcanic activity during the Quaternary, was intense on the Jos Plateau, the Benue trough and along the northeast to southwest Cameroon line. Like the Jos Plateau volcanic regions, most of the main volcanic provinces such as the Bamenda Highlands, the Mambilla Plateau and the Adamawa Plateau are characterized by basement uplift [ 5 ].

Thus, in Nigeria, the volcanic provinces occur as relicts of volcanism in the form of scattered volcanic plugs and cones in some cases [ 5 ]. On the relatively uplifted Jos Plateau region, volcanic rocks are represented by volcanic cones and calderas [ 2 ]. Some of these cones generally rise only few hundred meters above the Plateau surface and are steep-sided with a central crater which may measure up to m usually emerging at a breached in the crater wall.

They are mainly built of basaltic scoria, volcanic ash, lava and with some variety of inclusions. Reconnaissance visits were carried out to past volcanic eruption sites where a careful and systematic mapping of each of the volcanoes visited were carried out so as to determine its nature, size and composition.

Other information acquired was their physical surface weathering features, morphology, outcrop patterns and the extent of vegetation cover. Rock samples were collected for petrography, geochemistry and geochronology.

Both petrographic and geochemical studies were done in the Department of Geology, University of Jos, Nigeria. A constant monitoring of the Pidong Crater Lake through continuous water sampling 24—36 calendar months was done. The water samples were collected in ml polyethylene plastic bottles for cations and anion analysis. The sample for cations analysis was acidified with 0. Field investigations have revealed the existence of about 22 dormant volcanoes on the Jos Plateau region alone Table 1 and are generally aligned in series of NNW—SSE trend [ 6 , 7 , 8 ] Figure 2.

None of these volcanoes have record of any activity in recent past [ 8 , 9 ]. They are composed mainly of basaltic scoria and pyroclastic materials. Geological map of the 22 dormant volcanoes of the Jos Plateau showing sample locations. Tables 1 and 2 present the inventory of the dormant volcanoes on the Jos Plateau and the Biu Plateau, respectively. The Ganawuri line comprises from the north to south of the Bum, Jal, and Kwakwi volcanoes.

The Hoss volcanic line consists of two volcanoes; Miango in the north and Hoss volcano in the south. The Miango line consists of five volcanoes from the north to the south viz. The Southern-most end members are namely the Panyam and Gu volcanic lines. The Panyam volcanic line consists of seven volcanoes aligned in a NNE—SSW trending directions along a hypothetical fracture line [ 6 , 10 ]; Dai volcano referred to as Wushik volcano , Amshel volcano referred to as Kugol volcano , Dutsin volcano, Kerang volcano, Tingyaras volcano, Ampang volcano referred to as Mufil volcano , Pidong Crater Lake.

The Kerang I Dustin volcano has a peak of m above sea level and a crater diameter of m. The volcanic pile consists of ash, lapilli, scoria, pumices, breccias, basalts, boulders, and pyroclastic materials of various sizes. The Kerang II Kerang volcano has three craters with a peak height of m above sea level with a crater diameter ranging from m to 1 km Table 1. This volcano Kerang II is the second largest volcano on the Jos Plateau compared to the Jiblik volcano which has a peak height of m above sea level.

The volcanic pile of the Kerang II volcano is composed of ash, lapilli, scoria, breccias, bombs, basaltic boulders and pyroclastic materials lapilli, granitic and lava flows.