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Extrusive- formed when lava was erupted onto the Earth's surface (overground) and cooled and solidified. Intrusive- formed when magma cooled and solidified at a shallow zone within the Earth's crust (underground).
Wiki User
∙ 14y ago
Wiki User
∙ 12y agoFirst, they are classified as intrusive of extrusive. Next, rocks can be classified on a scale of mafic to felsic - mafic being low Silica, felsic being high. They are also grouped according to crystal size - coarse, medium and fine.
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What types igneous rocks do not belong to any of the three major igneous rocks families?
granodiorite, pyroxentite,dunite, and periodite rocks do not belong in the three major igneous rock families.
What are the three families of rocks?
the three rock families are igneous rock, metamorphic rock, and sedimentary rock
What are igneous rocks that form over the surface?
Rhyolititcen rocks.
Are igneous rocks made up of igneous rocks?
Sedimentary rock can be made up partially of igneous clasts, but igneous rock is igneous rock.
What do you call rocks that have been formed from the hot molten material within the earth's crust that has cooled and hardened?
Igneous rocks are formed by the solidification of molten materials.
What types igneous rocks do not belong to any of the three major igneous rocks families?
granodiorite, pyroxentite,dunite, and periodite rocks do not belong in the three major igneous rock families.
What are the three families of igneous rocks?
the three rock families are igneous rock, metamorphic rock, and sedimentary rock
What are the three families of rocks?
the three rock families are igneous rock, metamorphic rock, and sedimentary rock
What two methods are used to group igneous rocks?
Igneous rocks can be either intrusive or extrusive, based on their location upon solidification from magma. Igneous rocks can also be grouped by chemistry and mineral content as felsic, intermediate, or mafic, mainly on the abundance of silicate minerals that are present.
Scientists divide rocks into groups based on what?
Rocks are grouped by how they are formed. There are 3 types of rocks. Sedimentary, Metamorphic, and Igneous rock. Sedimentary rocks are made from broken down rocks, called sediment, which come from all three rocks. Metamorphic rocks come from existing rocks that are changed by heat and pressure. The Igneous rocks are formed from magma that rose up to the surface, also known as lava. When the lava cools and hardens it forms igneous rocks. That is a rock cycle. Rocks are grouped by how they are formed. There are 3 types of rocks. Sedimentary, Metamorphic, and Igneous rock. Sedimentary rocks are made from broken down rocks, called sediment, which come from all three rocks. Metamorphic rocks come from existing rocks that are changed by heat and pressure. The Igneous rocks are formed from magma that rose up to the surface, also known as lava. When the lava cools and hardens it forms igneous rocks. That is a rock cycle.
When molten rocks cools what rocks form?
igneous rocks
What are igneous rocks that form over the surface?
Rhyolititcen rocks.
Are igneous rocks made up of igneous rocks?
Sedimentary rock can be made up partially of igneous clasts, but igneous rock is igneous rock.
What do you call rocks that have been formed from the hot molten material within the earth's crust that has cooled and hardened?
Igneous rocks are formed by the solidification of molten materials.
Where are the two types of igneous rocks made?
Extrusive igneous rocks , Intrusive igneous rocks
Why are igneous are called primary rocks?
Igneous rocks
Are volcanic rocks igneous rocks?
Yes. Volcanic rocks are extrusive igneous rocks.
