What is a simile for volcano?
firey blobs” Kynagia says, “earring are as beautiful as volcanoes.” manuel says, “Lava look like fireworks.” Isaish says, “Lava sparks like fire.” Hannah says, “Lava is hot as fire.”
What is andesitic lava like?
lava. Lavas of andesitic or intermediate composition commonly form a somewhat different type of flow, known as a block lava flow. These resemble aa in having tops consisting largely of loose rubble, but the fragments are more regular in shape, most of them polygons with fairly smooth sides.…
What type of volcano is andesitic?
stratovolcanoes
Andesite commonly erupts from stratovolcanoes, where they form small-volume flows that typically advance only short distances down the flanks of a volcano. The two examples shown here are short andesite flows advancing down the slope of the Lascar volcano in Chile, and the Colima volcano in Mexico.
Is lava andesitic sticky?
Andesite lava is still hot (between 900-1100 deg C) and fluid enough to be able to form lava flows, but already sticky (viscous) enough to prevent lava flowing fast and being “runny”. Instead, andesitic flows are rather thick and tall, with a high aspect ratio between thickness and length.
What words describe a volcano?
Volcanos – thesaurus
- active. adjective. an active volcano is likely to erupt (=explode and pour out fire) at any time.
- crater. noun. the round hole at the top of a volcano.
- dormant. adjective.
- erupt. verb.
- extinct. adjective.
- inactive. adjective.
- lava. noun.
- lava. noun.
What is a synonym for lava?
In this page you can discover 22 synonyms, antonyms, idiomatic expressions, and related words for lava, like: magma, pumice, volcanic rock, igneous-rock, slag, volcano, volcanic, ashes, basalt, basaltic and crater.
What texture is andesite?
porphyritic
It is fine-grained (aphanitic) to porphyritic in texture, and is composed predominantly of sodium-rich plagioclase plus pyroxene or hornblende.
Where are andesitic volcanoes found?
Andesite stratovolcanoes are also found above subduction zones in Central America, Mexico, Washington, Oregon, the Aleutian Arc of Alaska, Japan, Indonesia, the Philippines, the Caribbean, and New Zealand, among other locations. Andesite can also form away from the subduction zone environment.
Is andesitic magma viscous?
Andesitic magmas, in particular, have a wide range of magma viscosities, from 102 to 107 Pa s, which is due to a wide range in phenocryst contents from 0 (phenocryst‐free andesitic melt) to ∼50 vol % (50 vol % rhyolitic melt + 50 vol % phenocrysts).
Is andesitic magma an explosive?
Explosive eruptions are favored by high gas content and high viscosity (andesitic to rhyolitic magmas).
How do you describe a volcanic eruption?
A volcanic eruption is the expulsion of gases, rock fragments, and/or molten lava from within the Earth through a vent onto the Earth’s surface or into the atmosphere. Illustration of the basic process of magma formation, movement to the surface, and eruption through a volcanic vent. USGS illustration.
How would you describe lava?
lava, magma (molten rock) emerging as a liquid onto Earth’s surface. The term lava is also used for the solidified rock formed by the cooling of a molten lava flow. The temperatures of molten lava range from about 700 to 1,200 °C (1,300 to 2,200 °F).
What is characteristics of andesite?
Andesite is a dark, fine-grained, brown or greyish intermediate volcanic rock which is a commonly found in lava. The mineral composition of andesite includes biotite, pyroxene, or amphibole.
How are andesitic volcanoes formed?
Andesite and diorite are common rocks of the continental crust above subduction zones. They generally form after an oceanic plate melts during its descent into the subduction zone to produce a source of magma.
What are the characteristics of andesitic rocks?
Why is andesitic lava viscous?
Andesitic lava is an example of a high viscosity lava whereas balastic lava has a low viscosity, so is more runny. High silica content in the andesitic lava contributes to causing this high viscosity and low silica content in the basaltic lava means it is of a lower viscosity.