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igneous rock, Pyroclastic rock
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What is the hardness of a volcanic rock?
That varies widely between different types of volcanic rock. Obsidian or volcanic glass, is harder then pumice, but both are volcanic rocks.
What Rock formed by the crystallization of magma?
Extrusive igneous rock is formed from the solidification of lava.Intrusive igneous rock is formed from the solidification of magma.
Smooth glassy rock that is formed when lava cools?
Obsidian
What rock would most likely be found near a volcano?
When lava reaches the surface of the Earth through volcanoes or through great fissures the rocks that are formed from the lava cooling and hardening are called extrusive igneous rocks. Some of the more common types of extrusive igneous rocks are lava rocks, cinders, pumice, obsidian , and volcanic ash and dust
How egneous rocks are formed?
Igneous rocks are types of rocks that are formed by fire. They can be formed in the ground from magma that gets trapped in air pockets. Above ground they can form when lava cools along the ground.
What are types of volcanic rock?
Volcanic rocks are extrusive igneous rocks.
What are the types of island formation are in the Caribbean?
Some of the types of island formation in the Caribbean include volcanic islands formed by volcanic activity, limestone islands formed by the uplift of coral reefs and sedimentary rocks, and continental islands that were once connected to mainland South America but separated due to tectonic movements.
How many rocks are on the earth?
the three major rocks are igneous, sedimentary, and metamorphic rock. igneous- volcanic rocks sedimentary- rocks with layers on top metamorphic- rocks that formed to another rock
What is the hardness of a volcanic rock?
That varies widely between different types of volcanic rock. Obsidian or volcanic glass, is harder then pumice, but both are volcanic rocks.
What types of features are formed between plates?
volcanic lava
What types of rocks are formed above ground?
Extrusive igneous rocks and some sedimentary rocks are formed above ground.
What type of rock is igneous?
Igneous rocks are formed by the hardening of molten lava from a volcanic erruption. These rocks are also categorised by two types. One that is formed by rapid hardening / solidifying of lava eg. Granite and one that is formed by slow hardening eg. Basalt. These rocks have high density, strength and are bulky.
Which types of rocks are formed above ground?
Extrusive igneous rocks are one type of rocks that can be formed above the ground. Sedimentary rocks can also be formed above the ground.
What types of volcanic rocks are generally found at divergent plate boundaries?
Basaltic
What Two types of rocks that have no minerals?
Volcanic glasses have no crystalline structure, and technically no minerals.
What rock types are formed above ground?
Extrusive igneous rocks and some sedimentary rocks are formed above ground.
What Rock formed by the crystallization of magma?
Extrusive igneous rock is formed from the solidification of lava.Intrusive igneous rock is formed from the solidification of magma.
