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Because intrusive rocks cool more slowly which makes the rocks larger.
Because as an intrusive rock cools underground, it will normally cool more slowly than an extrusive (surface) rock. The slow cooling allows more time for the crystals to grow.
extrusive ingeneous rocks
Extrusive, Igneous rocks possibly lavas or ignimbrites.
When lava cools, it forms what is known as an extrusive igneous rock. Volcanoes are also associated with alteration from heat and fluids. Therefore you would expect to find extrusive rocks as well as altered rocks.
Because intrusive rocks cool more slowly which makes the rocks larger.
Because as an intrusive rock cools underground, it will normally cool more slowly than an extrusive (surface) rock. The slow cooling allows more time for the crystals to grow.
you would find igneous rocks with small crystals at the bottom of the volcano, this is because when the rocks crack. It brakes apart into igneous rocks
extrusive ingeneous rocks
Lava slowly flowing out of a fracture in the Earth's surface :)
Extrusive, Igneous rocks possibly lavas or ignimbrites.
When lava cools, it forms what is known as an extrusive igneous rock. Volcanoes are also associated with alteration from heat and fluids. Therefore you would expect to find extrusive rocks as well as altered rocks.
You would find extrusive igneous rocks. Beyond that it depends on the volcano.
extrusive igneous rock
You would find extrusive igneous rocks. Beyond that it depends on the volcano.
Slow cooling in the upper mantle
Slow cooling in the upper mantle