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What are some intrusive igneous rocks?
diorite
Some igneous rocks cool at the surface and some cool underground. What are the names of these two types?
Underground = intrusive/plutonic aboveground = extrusive/volcanic
What kind of igneous rocks for on earths surface?
Some do. These are called extrusive igneous rocks. However a large portion of igneous rocks form beneath the surface. These are intrusive igneous rocks.
What are some examples of rocks that form below Earth surface?
Igneous intrusive
Where would you find intrusive igneous rocks?
there was volcanic activity in the area at some point in the past
In a deep mine a geologist discovered a band of igneous rock cutting through some limestone bedswhat kind of rocks was that band?
The band of rock discovered would be classified as an intrusive igneous rock since it formed beneath the Earth's surface.
Is silica intrusive igneous igneous rocks?
Silica is a mineral occurring alone as quartz, flint & chert and some semi-precious stones; but it is a primary constituent of all igneous rocks irrespective of mode of formation & deposition.
What are some examples of mafic intrusive igneous rocks?
Examples of mafic intrusive igneous rocks include gabbro, diabase, and dolerite. These rocks are typically dark in color and are composed predominantly of minerals such as pyroxene and plagioclase feldspar. Mafic rocks form from magma that is rich in iron and magnesium, with low silica content.
What is the difference between intrusive and igneous rocks?
The difference between an Extrusive and Intrusive igneous rock is the way in which they cool. An Extrusive igneous rock cools very fast on the surface and is created by lava. Since the cooling process is very fast extrusive igneous rocks have very small crystals (fine grained). On the other hand an Intrusive igneous rock cools very slowly beneath the surface and is created by magma. Since the cooling process is very slow intrusive igneous rocks have very large crystals (coarse grained). In some instances there is also a third type of igneous rock. Technically it is an extrusive rock, but it resembles glass. This glass type of igneous rock forms when magma/lava is instantly cooled.
If magma crystallizes before it reaches earth's surface it will form a what igneous rock?
It will for an intrusive igneous rock. They usually take longer to cool and have more coarse grains.
Is volcanic rock only igneous?
Lava is, by preferred definition, a viscous fluid comprised of molten rock that has reached the surface. In this case, lava is not an igneous rock. However, 'lava' can also refer to the cooled and solidified product of the molten rock. In this case, lava is an igneous rock, formed from the solidification of molten lava.
Which igneous rocks are coarse grained due to slow cooling?
All molten rock is capable of cooling quickly into fine-grained rocks, but here are some common fine-grained igneous rocks: Basalt Obsidian Andesite Rhyolite Tuff (a rock made from volcanic ash)
