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What is it called when Magma that is extruded onto the surface either beneath water or air?
Magma that has come to the surface is then referred to as Lava.
What are some words to describe lava girl?
Fiery, powerful, determined, mysterious.
What do pillow basalts indicate about the environment of volcanism?
Pillow basalts indicate that the volcanic eruption occurred underwater or in a submarine environment. The rapid cooling of lava in water causes it to form characteristic pillow-like shapes. This suggests that the volcano was either located on the ocean floor or erupted into a body of water.
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 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.
Does pillow lava have high silica?
No. Pillow lava is basaltic, so it has a low silica content.
Lava that forms underwater as rounded lumps?
This type of lava is known as pillow lava. When molten lava is erupted underwater, it quickly cools and solidifies into pillow-shaped structures due to the rapid cooling effect of the surrounding water. Over time, multiple layers of pillow lava can accumulate to form underwater volcanic structures.
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.
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.
How did pillow lava get its name?
Pillow lava got its name because of its distinctive pillow-like shapes that form when lava flows underwater and cools rapidly. As the outer layer of lava cools and solidifies quickly upon contact with water, it forms a rounded mound resembling a pillow. This unique shape is characteristic of lava flows in underwater volcanic environments.
How are Pillow Lava and Pahoehoe lava the same?
Both pillow lava and pahoehoe lava are types of basaltic lava that form during submarine volcanic eruptions. They both have smooth, ropy surfaces, caused by the flow of lava, and are relatively low in viscosity.
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.
How does pillow basalt form?
Pillow basalt forms when basaltic lava erupts underwater and cools rapidly, creating pillow-shaped structures. Water cools the lava quickly, causing it to solidify into distinctive pillow-like shapes as it is extruded.
When Lava cools underwater what usually forms?
When lava cools underwater, it usually forms a type of igneous rock known as pillow lava. This occurs because the rapid cooling of lava in water causes it to solidify quickly and take on a rounded, pillow-like shape. Pillow lava formations are commonly found at mid-ocean ridges and undersea volcanoes.
What is in an underwater lava flow called?
An underwater lava flow is called "pillow lava" when it forms from the rapid cooling of lava upon contact with water. This type of lava takes on a rounded, pillow-like shape due to the formation of a crust that traps the molten lava inside, which then expands and breaks through the surface. Pillow lava is commonly found at mid-ocean ridges and volcanic ocean floors.
