What is the extrusive compositional equivalent of the intrusive rock granite?
Rhyolite
Rhyolite is the aphanitic (fine-grained) extrusive equivalent of granite. Named after the Andes Mountains in South America, where andesite is a common volcanic rock. A fine-grained (aphanitic) intermediate volcanic igneous rock. Light to intermediate color.
What is the intrusive equivalent of basalt?
gabbro
Diabase is a dark-coloured intrusive rock, found as dykes or sills, composed of mainly feldspar, pyroxene +/- olivine. It is the intrusive equivalent of basalt and the shallow intrusive equivalent of gabbro.
What is the physical difference between intrusive and extrusive rocks?
The two main categories of igneous rocks are extrusive and intrusive. Extrusive rocks are formed on the surface of the Earth from lava, which is magma that has emerged from underground. Intrusive rocks are formed from magma that cools and solidifies within the crust of the planet.
What is the difference between intrusive and extrusive rocks and their mineral sizes?
Intrusive igneous rocks cool from magma slowly in the crust. They have large crystals. Extrusive igneous rocks cool from lava rapidly at the surface. They have small crystals.
Can an intrusive rock have the same chemical composition as an extrusive rock?
Because of how they’re formed, intrusive and extrusive rocks have different textures (defined by crystal sizes), but other than that they’re very similar. They can even have the same chemical composition.
Which rock is the Phaneritic intrusive equivalent of rhyolite?
Granite
Classification of Igneous Rocks
TEXTURE | Felsic | Ultramafic |
---|---|---|
Phaneritic | Granite | Peridotite |
Aphanitic | Rhyolite | |
Vesicular | Pumice | |
Glassy | Obsidian |
What is the volcanic equivalent of the gabbro?
volcanic basalt
Gabbro is dark gray to greenish black color plutonic rock and chemically equivalent to volcanic basalt.
What is the similarities of intrusive and extrusive?
Intrusive and extrusive igneous rocks are alike in that they are both formed from the cooling and crystallization of molten substance (magma and lava, respectively). Because of how they’re formed, intrusive and extrusive rocks have different textures (defined by crystal sizes), but other than that they’re very similar.
Which characteristics is best for identifying whether a rock is intrusive or extrusive?
The rate at which magma cools determines whether an igneous rock is intrusive or extrusive. The cooling rate is reflected in the rock’s texture.
Why intrusive rocks have larger crystal formation compare with extrusive rocks?
The most obvious difference between extrusive rocks and intrusive rocks is crystal size. Because extrusive rocks cool quickly, they only have time to form very small crystals such as basalt or none at all. On the other hand, intrusive rocks grow larger crystals because they take longer to cool.
What do intrusive and extrusive rocks have in common?
Rock Formation
Extrusive rocks and intrusive rocks both form when hot molten material crystallizes. However, extrusive rocks form from lava at the surface of the Earth, whereas intrusive rocks form from magma underground, often relatively deep in the Earth. A pluton is a block of intrusive igneous rock.
What common characteristic do intrusive and extrusive rocks have in common?
Intrusive and extrusive igneous rocks are alike in that they are both formed from the cooling and crystallization of molten substance (magma and lava, respectively).
Is basalt The fine grained equivalent of gabbro?
Basalt is the fine-grained equivalent of gabbro. It is fine grained because the magma cools very rapidly when it flows out onto the surface. Basalt forms from magma that is rich in iron and magnesium and poor in silica (quartz).
What rock is similar to gabbro?
Gabbro and Basalt are Related
Gabbros are equivalent in composition to basalts. The difference between the two rock types is their grain size. Basalts are extrusive igneous rocks that cool quickly and have fine-grained crystals. Gabbros are intrusive igneous rocks that cool slowly and have coarse-grained crystals.
How do you identify intrusive and extrusive igneous rocks?
Intrusive rocks have a coarse grained texture. Extrusive Igneous Rocks: Extrusive, or volcanic, igneous rock is produced when magma exits and cools above (or very near) the Earth’s surface. These are the rocks that form at erupting volcanoes and oozing fissures.
What is the difference between extrusive and intrusive igneous rocks Brainly?
Explanation: Extrusive igneous rocks come from lava, forming at the surface of the Earth and cooling quickly, meaning they form very small crystals. Intrusive igneous rocks come from magma, forming deep underground and taking longer to cool, meaning they form larger crystals.
How can you determine if an igneous rock has an intrusive or extrusive origin?
Answer and Explanation: The rocks with the larger crystals have an intrusive origin, while the rocks with smaller crystals have an extrusive origin.
What are the properties of extrusive rocks?
Answer. Extrusive Rocks. Igneous rocks which form by the crystallization of magma at the surface of the Earth are calledextrusive rocks. They are characterized by fine-grained textures because their rapid cooling at or near the surface did not provide enough time for large crystals to grow.
What is the visible difference between an intrusive and an extrusive igneous rock?
What are the similarities of intrusive igneous rocks and extrusive igneous rocks?
Which characteristic is common to extrusive igneous rocks?
Igneous rocks which form by the crystallization of magma at the surface of the Earth are called extrusive rocks. They are characterized by fine-grained textures because their rapid cooling at or near the surface did not provide enough time for large crystals to grow.
What is the extrusive equivalent of gabbro?
Gabbros are plutonic rocks formed by cooling and crystallization of molten magma trapped under the Earth’s surface and chemically equivalent to extrusive basalt.
What is the fine grained equivalent of diorite?
Andesite is a fine crystalline intermediate extrusive rock. It is commonly grey and porphyritic. It can be found in the Andes Mountains and in some island arcs (see Chapter 2). It is the fine grained compositional equivalent of diorite.
What rock is similar to granite?
Granodiorite. Granodiorite is very similar to granite. It has less of the potassium variety of feldspar, more of the sodium feldspar (plagioclase).
What is the main similarity of gabbro and basalt?
Both basalt and gabbro are made from the same kind of molten rock with the same chemistry. It is relatively low in silica, but high in magnesia and iron (that’s what I meant by ingredients). Here are pictures of both of types of rocks: Photos by USGS.