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Because it solidifies outside the surface of the earth, it is an extrusive igneous rock.
Wiki User
∙ 16y ago
Wiki User
∙ 12y agopillow like shaped lava composed of basalt
Wiki User
∙ 11y agoNo. Magma is molten rock that has not erupted. After it erupts it may or may not form pyroclastic material depending on how explosive the eruption is.
Wiki User
∙ 11y agono. Pillow lava is a type of lava
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What type of magma forms at mid-ocean ridges?
pillow lava named that because when it cools it looks like pillows.
What is formed by magma cooling?
Intrusive igneous rock is formed when magma or lava cools quickly.
How far below the Earth's surface is magma found?
Pillow lava is the lava structure typically formed when lava emerges from an underwater volcanic vent or subglacial volcano or a lava flow enters the ocean. However, pillow lava can also form when lava is erupted beneath thick glacial ice. The viscous lava gains a solid crust on contact with the water, and this crust cracks and oozes additional large blobs or "pillows" as more lava emerges from the advancing flow. Since water covers the majority of Earth's surface and most volcanoes are situated near or under bodies of water, pillow lava is very common.
Why are crystals in pillow basalt smaller then ones in basalt?
A factor that determines crystal size in igneous rocks is the speed in which the lava/ magma crystallised or froze. As pillow basalts form at mid ocean ridges where magma is erupted into direct contact with the cold sea water the crystals form very fast and are therefore small. Other basalts erupted on land still have relatively small crystals and crystallised relatively fast but overall slower then pillow basalts.
Why are the crystals in pillow basalt smaller than those in many other examples of basalt?
A factor that determines crystal size in igneous rocks is the speed in which the lava/ magma crystallised or froze. As pillow basalts form at mid ocean ridges where magma is erupted into direct contact with the cold sea water the crystals form very fast and are therefore small. Other basalts erupted on land still have relatively small crystals and crystallised relatively fast but overall slower then pillow basalts.
How hot is pillow lava?
pillow lava is 2500 degrees
Describe the appearance of lava flows along the ocean floor?
When a volcano ejects lava from the ocean floor, the lava cools very rapidly. This causes the outside of the lava plume to solidify. Pressure builds inside this lava pillow, as it is usually described, until it breaks through a weak area in the pillow "shell" and forms a new lava pillow. The process repeats until the lava source is exhausted or the pressure wanes.
How are Pillow Lava and Pahoehoe lava the same?
Both pillow lava and pahoehoe lava have about the same composition and harden into a kind of rock called basalt.
Does pillow lava have high silica?
No. Pillow lava is basaltic, so it has a low silica content.
How did pillow lava get its name?
Pillow lava got it's name by the it looks. It looks like pillows.
Does Krakatoa make pillow lava?
No. Pillow lava is basaltic, low-viscosity lava. Krakatoa is a stratovolcano with a style of ereuption more characteristic of high-viscosity andesitic lava.
Where would you expect to find pillow lava in the modern world?
in a volcano Pillow lava forms only when lava emerges from a place that is submerged under water.
What Type of Lava usually flows out of oceanic volcanoes?
mafic lava
What is pillow lava?
Pillow lava is basaltic lava that forms rounded pillow like lumps. It forms when a volcano erupts fairly deep underwater. Lava erupts bu quickly crusts over, creating a bulbous formation. The crust then breaks and more lava spills out, continuing the process.See the link below for a video of pillow lava.
Lava that forms underwater as rounded lumps?
Its definently "Pillow Lava".
When lava cools under water often forms?
Pillow Lava forms when lava cools underwater. It appears in rounded lumps giving the pillow appearance. Good luck.
What are the three types of lava flows associated with basaltic lava?
basaltic lava can form a'a, pahoehoe, or pillow lava.
