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Which igneous rock is dark colored cooled rapidly on earths surface and is composed mainly of plagioclase feldspar olivine and pyroxene?
scoria
What is the extrusive equivalent of peridotite?
It's very rare to have an extrusive Peridotite, but under the right conditions Komatite can form. It's similar in appearance to Basalt, but has long ( anywhere between 1-10 cm) criss-crossing needles of olivine or pyroxene.
What is an igneous rocks color mainly determined by?
The color of an igneous rock is mainly determined by the minerals present in the rock. Different minerals exhibit different colors, such as feldspar being pink or white, while olivine is green. Additionally, the texture and size of mineral grains can also affect the overall color of the rock.
What rock in the igneous family are medium colored and have no silica?
Igneous rocks that are medium colored and have no silica are called mafic rocks. They are mainly composed of magnesium and iron.
Is Cinnabar a igneous rock?
No, cinnabar is not an igneous rock. It is a mineral mainly composed of mercury sulfide. It is typically found in hydrothermal veins and is associated with volcanic activity, but it is not classified as an igneous rock.
Which igneous rock is dark colored cooled rapidly on earths surface and is composed mainly of plagioclase feldspar olivine and pyroxene?
scoria
What are chief elements in igneous rock?
Igneous rocks are composed mainly of silicate minerals. Granite is mostly quartz, feldspar and mica. Basalt is mainly feldspar, pyroxine and amphibole. Diorite can be a mixture of all of these minerals. Peridotite is mainly olivine (peridot) and pyroxine.
Which intrusive igneous rock could be composed of 60 percent pyroxene 25 percent plagioclase feldspar 10 percent olivine and 5 percent amphibole?
This intrusive igneous rock could be a gabbro. Gabbros are composed mainly of pyroxene and plagioclase feldspar, with lesser amounts of olivine and amphibole. This composition suggests a mafic rock with dark minerals dominating.
Which is a coarse-grained igneous rock composed of mainly pyroxene plagioclase feldspar and olivine?
Gabbro.
Peridotite is composed almost entirely of dark silicate minerals.?
Peridotite is a coarse-grained, dense igneous rock composed mainly of olivine and pyroxene minerals. It is typically green in color due to the high concentration of olivine. Peridotite is commonly found in the Earth's upper mantle and is important in the formation of oceanic lithosphere.
What is the extrusive equivalent of peridotite?
It's very rare to have an extrusive Peridotite, but under the right conditions Komatite can form. It's similar in appearance to Basalt, but has long ( anywhere between 1-10 cm) criss-crossing needles of olivine or pyroxene.
What rock is composed mainly of ferromagnesian minerals?
Ultramafic rocks are made of ferromagnesian minerals.
Is gabbro a foliated or nonfoliated rock?
Gabbro is a nonfoliated rock, meaning it does not have a layered structure like foliated rocks such as slate or schist. Gabbro is a coarse-grained, intrusive igneous rock composed mainly of pyroxene, plagioclase feldspar, and sometimes olivine.
Is the rock olivine intrusive?
Olivene is a mineral, not a rock. It can be found in both intrusive and extrusive igneous rocks. The appearance of olivene is mainly controlled by the composition of the magma
What is an igneous rocks color mainly determined by?
The color of an igneous rock is mainly determined by the minerals present in the rock. Different minerals exhibit different colors, such as feldspar being pink or white, while olivine is green. Additionally, the texture and size of mineral grains can also affect the overall color of the rock.
What is the difference between gabbro and basalt?
Gabbro is a coarse-grained, intrusive igneous rock composed mainly of calcium-rich plagioclase feldspar, pyroxene, and sometimes olivine. Basalt, on the other hand, is a fine-grained, extrusive igneous rock composed mainly of plagioclase feldspar and pyroxene. Basalt is typically found on the Earth's surface, while gabbro is usually found beneath the surface as intrusive rock formations.
What rock in the igneous family are medium colored and have no silica?
Igneous rocks that are medium colored and have no silica are called mafic rocks. They are mainly composed of magnesium and iron.
