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Igneous rocks are generally classified first on the basis of their formation (and therefore their texture) as intrusive or extrusive. Intrusive rocks are solidified from magma under the surface resulting in a visible crystalline texture, and extrusive igneous rocks are solidified from lava at or near the surface, resulting in a small or nearly invisible crystalline texture.
Igneous rock can additionally be classified by general chemistry composition as felsic, intermediate, mafic, and ultramafic. Felsic rocks are higher in silica and aluminum. Maficrocks are higher in magnesium and iron.
Examples of igneous rock include:
- pumice
- basalt
- andesite
- wehrlite
- monzonite
- anorthosite
- welded tuff
- nepheline syenite
- aplite
- websterite
- kimberlite
- gabbro
- diorite
- granite
- basanite
- troctolite
- pegmatite
- diabase
- picrite
- latite
- granodiorite
- tonalite
- peridotite
- ignimbrite
- hornblendite
- lampophyre
- phonolite
- dunite
- syenite
- tachylyte
- monzogranite
- tephrite
- granophyre
- boninite
- rhyodacite
- trachyte
- carbonatite
- harzburgite
- icelandite
- pyroxenite
- trachyandesite
- foidolite
- rhyolite
- obsidian
- scoria
Words used to describe igneous rock or igneous rock typesinclude: ultramafic, mafic, intermediate, felsic, aphanitic, porphyritic, phaneritic, extrusive, intrusive, vesicular, glassy, coarse grained, fine grained, acidic, basic.
Some examples of igneous rocks are granite, basalt, and pumice. Granite is a common intrusive igneous rock with large grains, basalt is a fine-grained extrusive rock commonly found in oceanic crust, and pumice is a light, porous rock formed from frothy lava.
Examples of igneous rock include:
- pumice
- basalt
- gabbro
- diorite
- granite
- rhyolite
- obsidian
- scoria
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What are rocks that form when lava hardens?
Rocks that form when lava hardens are known as igneous rocks. Examples of igneous rocks include basalt, granite, and obsidian, depending on the composition and cooling rate of the lava.
Name 4 kinds of igneous rocks?
Examples of igneous rocks are pumice, obsidian, basalt, and rhyolite.
Which rocks have a name that means ''fire''?
Igneous rocks are rocks that form from the cooling of magma or lava, and "igneous" is derived from the Latin word for "fire." Examples of igneous rocks include basalt, granite, and pumice.
What are non-examples of metamorphic rocks?
Sandstone, limestone, and shale are examples of sedimentary rocks. Granite, basalt, and obsidian are examples of igneous rocks.
What type of rock is formed by cool lava or magma?
An igneous rock is formed when magma cools and hardens. Some examples of igneous rocks are pumice and obsidian.
What are some common igneous rocks?
Examples of igneous rock include:pumicebasaltgabbrodioritegraniterhyoliteobsidianscoria
What are some examples of the three rock types?
Some examples of igneous rocks are granite, basalt, and pumice. Examples of sedimentary rocks include limestone, sandstone, and shale. And examples of metamorphic rocks are marble, slate, and quartzite.
What are two examples of fine-grained igneous rocks?
Basalt and rhyolite are examples of fine-grained igneous rocks.
What are two examples of fined grained igneous rocks?
Basalt and rhyolite are examples of fine-grained igneous rocks.
What are rocks that form when lava hardens?
Rocks that form when lava hardens are known as igneous rocks. Examples of igneous rocks include basalt, granite, and obsidian, depending on the composition and cooling rate of the lava.
What are some more examples extrusive igneous rocks?
Some other examples are Andesite, Basalt, Rhyolite, and Scoria.
What are some examples of rocks that form below Earth surface?
Igneous intrusive
What are some igneus rocks?
Some examples of igneous rocks include granite, basalt, and obsidian. Igneous rocks are formed from the cooling and solidification of molten magma or lava.
4 kinds of igneous rocks?
Examples of igneous rocks are pumice, obsidian, basalt, and rhyolite.
Rocks which contain a variety of minerals are examples of a?
Igneous Rocks
Name 4 kinds of igneous rocks?
Examples of igneous rocks are pumice, obsidian, basalt, and rhyolite.
Which rocks have a name that means ''fire''?
Igneous rocks are rocks that form from the cooling of magma or lava, and "igneous" is derived from the Latin word for "fire." Examples of igneous rocks include basalt, granite, and pumice.
