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The type of rock depends on how the volcano erupted and how quickly the lava cooled. Gaseous lava that is cooled is pumice, a stone so light it floats on water. Thick, slow moving lava hardens into rhyolite. Volcanoes in the Hawaiian islands sometimes have their lava cool quickly, forming a smooth, glassy black rock called obsidian. These are all classified as igneous rocks.
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What type rock forms when magma cools and hardens?
Igneous rock forms when magma cools and hardens. This type of rock can be classified as intrusive (plutonic) if it cools below the Earth's surface (slow cooling) or extrusive (volcanic) if it cools quickly on the Earth's surface. Examples of igneous rocks include granite, basalt, and obsidian.
Is Basalt intrusive or extrusive?
extrusive it forms when lava from a volcanic eruption cools on the surface.
When melted rock cools or hardens in or under earth surface it forms to what?
When melted rock cools and hardens in or under the Earth's surface, it forms igneous rock. This process can happen above ground, forming volcanic rocks, or below ground, forming intrusive rocks.
Is volcanic glass an intrusive or extrusive igneous rock?
Volcanic glass is an extrusive igneous rock. It forms when molten lava cools quickly on the Earth's surface, preventing the formation of crystals.
Is lava intrusive or extrusive?
Lava is extrusive, meaning it forms on the Earth's surface as a result of volcanic activity. It cools rapidly and solidifies quickly into volcanic rock, such as basalt or obsidian. Intrusive rock, on the other hand, forms below the Earth's surface from magma that cools slowly.
How does volcanic rock form?
Volcanic rock forms by lava that has come from a volcano, cools and solidifies to form the rock.
What rock is formed when lava cools at the service of the earth?
Extrusive igneous rock such as basalt forms when lava cools at the earth's surface.
When igneous rock from volcanic eruption cool what does it form?
When igneous rocks from a volcanic eruption cools it forms Crystalline Rocks.
What kind of mineral does magma form when it cools?
When magma cools, it forms igneous rock.
What type rock forms when magma cools and hardens?
Igneous rock forms when magma cools and hardens. This type of rock can be classified as intrusive (plutonic) if it cools below the Earth's surface (slow cooling) or extrusive (volcanic) if it cools quickly on the Earth's surface. Examples of igneous rocks include granite, basalt, and obsidian.
Is Basalt intrusive or extrusive?
extrusive it forms when lava from a volcanic eruption cools on the surface.
What kind of igneous rock forms when lava cools at earths surface?
Such rock is extrusive igneous rock.
What kind of rock forms from magma that cools below the earth's surface?
Intrusive Igneous Rock.
Is cinder rock volcanic rock?
Yes, cinder rock is a type of volcanic rock that forms when magma is ejected from a volcano, cools rapidly, and solidifies into porous, lightweight fragments.
What kind of rock forms when lava cools in the ocean?
When lava cools in the ocean, it forms a type of rock called pillow basalt. This distinctive rock gets its name from its pillow-like shape that results from the rapid cooling of lava in water. Pillow basalt is commonly found in areas where underwater volcanic eruptions occur.
When lava cools rapidly a crust forms on the surface of the flow If the low continues the crust wrinkles and forms volcanic rock known as what?
Pahoehoe.
When melted rock cools or hardens in or under earth surface it forms to what?
When melted rock cools and hardens in or under the Earth's surface, it forms igneous rock. This process can happen above ground, forming volcanic rocks, or below ground, forming intrusive rocks.
