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Why are the crystals in pillow basalt smaller than those in many other examples of basalt?
Wiki User
∙ 7y ago
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.
Wiki User
∙ 7y ago
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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.
Describe pillow lava?
Because it solidifies outside the surface of the earth, it is an extrusive igneous rock.
What type of magma forms at mid-ocean ridges?
pillow lava named that because when it cools it looks like pillows.
What does your pillow was a cloud after a long day mean?
It means the pillow was fluffy and comfortable and soft
How is a cloud like a pillow?
A cloud is white like a pillow and looks soft like a pillow...your answer depends on if its for English or science or just cos you want to know! :P
Why are the crystals in pillow basalt smaller than the crystals in basalt that forms in the ground?
Pillow basalt is formed from solidifying lava which erupts under the surface of a body of water. Because of this, it cools much faster, allowing less time for crystal growth.
Why are the crystals smaller in basalt pillows?
Pillow basalt forms underwater. Water absorbs heat from lava much more quickly than air does.
Why are the crystals in pillow basalt smaller than those of 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.
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 Crystal's in pillow basalt smaller than those of in other example of basalt?
Pillow basalts are lavas that were erupted and cooled in sea water. Therefore, they have had very little time to form crystals of any size, during rapid solidification, when compared to most land or air-born eruptions.
Why are the crystals in pillow basalt 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 does pillow basalt form?
Pillow basalt is formed when lava extrudes from the ocean floor - perhaps into a sediment overburden (?) - such that each bolus of lava is separate from the others.
Why are the crystals in pillows basalts smaller than those in many other examples of basalts?
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 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.
What is the name of a long pillow that supports smaller pillows on a bed?
Bolster
Describe pillow lava?
Because it solidifies outside the surface of the earth, it is an extrusive igneous rock.
Pillow basalt originates at the surface of volcanic islands?
False. Basaltic lava sometimes is erupted under water or flows into the ocean. It makes a formation like a pile of pillows on the sea bottom. Pillow lava crystallizes quickly from the outside to the inside of each "pillow." Lava of this type forms only under water. Pillow lavas are found on many mountains throughout the world.
