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a compositional group of igneous rocks indicating that the rock contains substantial dark silicate minerals and calsiumrich plagioclase feldspar. a compositional group of igneous rocks indicating that the rock contains substantial dark silicate minerals and calsiumrich plagioclase feldspar.
Basaltic composition refers to igneous rocks that are rich in dark-colored minerals like pyroxene and olivine, with low silica content. These rocks are commonly found in oceanic crust and are erupted as basalt lava flows. Basaltic compositions typically have a higher density than other types of igneous rocks.
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When An igneous rock that contains mostly plugholes feldspar and about W percent dark silicates minerals has a composition that is?
Igneous rocks containing mostly plagioclase feldspar and a significant percentage of dark silicate minerals are typically classified as basaltic rocks. These rocks have a composition that is intermediate between mafic and felsic rocks, with a silica content of around 50-60%. Basaltic rocks often form from the solidification of magma with a basaltic composition.
What igneous rocks have a mineral composition between that of granitic and basaltic rocks?
Andesite and diorite are two common igneous rocks that have a mineral composition intermediate between granitic and basaltic rocks. Andesite is fine-grained and contains plagioclase feldspar and pyroxene minerals, while diorite is coarse-grained and composed of plagioclase feldspar, amphibole, and other minerals.
What extrusive igneous rock has a mafic composition and a glassy texture?
Obsidian is an extrusive igneous rock with a mafic composition and a glassy texture. This rock forms from the rapid cooling of lava with high silica content, preventing the growth of mineral crystals and resulting in its glassy appearance.
What is the opposite of basaltic?
The opposite of basaltic is rhyolitic. Basaltic rocks are formed from lava that is low in silica content, while rhyolitic rocks are formed from lava that is high in silica content.
Do shield volcanoes have high viscosity?
No, shield volcanoes have low viscosity lava due to their composition of basaltic magma, which has low silica content. This low viscosity allows the lava to flow easily and spread out over a wide area, resulting in the gentle, sloping shape characteristic of shield volcanoes.
Where do rocks have a basaltic composition?
Oceanic crust is made of basaltic rock. The rocks formed from hotspot volcano lavas are also often basaltic too.
Where do most rocks have a basaltic composition?
Most rocks with a basaltic composition are typically found in oceanic crust, such as the ocean floors and mid-ocean ridges. Basaltic rocks are also common in volcanic regions like Hawaii and Iceland.
Where do most rocks have basaltic composition?
Most rocks with basaltic composition are found in volcanic regions, such as volcanic islands and mid-oceanic ridges. They are also commonly found in continental flood basalt provinces, which are large expanses of basaltic lava flows that cover extensive areas of land. Basaltic rocks can sometimes be found in other settings as well, such as in certain types of metamorphic rocks.
What type of magma does Mt Etna have?
The composition of Mt. Etna is basaltic.
Are basalt rocks pyroclastic?
Usually not. Although it is possible to have pyroclastic material with a basaltic composition, most basaltic rocks are from simple lava flows.
What is Sunset Crater's magma composition?
Sunset Crater was fed by basaltic magma.
When An igneous rock that contains mostly plugholes feldspar and about W percent dark silicates minerals has a composition that is?
Igneous rocks containing mostly plagioclase feldspar and a significant percentage of dark silicate minerals are typically classified as basaltic rocks. These rocks have a composition that is intermediate between mafic and felsic rocks, with a silica content of around 50-60%. Basaltic rocks often form from the solidification of magma with a basaltic composition.
What is the composition of magma of popocatepetl?
A mixture of dacite (65wt% SiO2) and basaltic andesite (53wt% SiO2).
What are the tectonic settings associated with the formation of basaltic composition magmas?
Basaltic composition magmas are commonly associated with divergent plate boundaries where seafloor spreading occurs, such as mid-ocean ridges. They can also form in hot spots, such as Hawaii, where mantle plumes rise through the crust. Additionally, basaltic magmas can be generated at convergent plate boundaries where oceanic crust subducts beneath continental crust.
Are basaltic lavas a pahoehoe lava?
Basaltic lavas can be either pahoehoe or a'a lava types. Pahoehoe lavas have smooth, rope-like textures, while a'a lavas are rough and jagged. The type of lava formed depends on various factors such as temperature, composition, and viscosity.
How are rocks from the Highland and Maria areas of the Moon different?
The Lunar Highland rocks reflective and anothositic in composition, while the Lunar Maria are less reflective and basaltic in composition.
What is the primary composition of the Earth's oceanic crust?
Oceanic crustal rock is basaltic in composition. if u havent read about it or hear about it ont put it on ur paper trust me
