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Why are granitic and andesitic rocks as plentiful as they are on Earth?
Granitic and andesitic rocks are plentiful on Earth because they are primarily formed by the cooling and solidification of magma beneath the Earth's crust. These rocks are commonly found in continental crust due to the process of subduction, where oceanic crust is forced beneath the continental crust, leading to the melting and formation of granitic and andesitic rocks.
Andesitic rocks have mineral compositions between those of basaltic rocks and?
granitic rocks. They are typically intermediate in silica content and often contain minerals such as feldspar, amphibole, and pyroxene. Andesitic rocks are associated with volcanic activity at convergent plate boundaries.
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.
Is it true Andesitic rock is an igneous rock with a composition in between that of basaltic and granitic igneous rock.?
Yes, andesitic rock is indeed an igneous rock that has a composition situated between basaltic and granitic rocks. It typically contains a moderate amount of silica, ranging from about 57% to 63%, which gives it characteristics that are intermediate between the two. Andesitic rocks are commonly found in volcanic arcs and are often associated with subduction zones.
Why are andesitic and granitic rocks confined to the continents and ocean margins but absent from deep ocean basins?
The igneous rock underlying the deep ocean basins is basaltic, as its source material comes from the asthenosphere. Andesitic igneous rock is formed at colliding plate margins, where subducting oceanic crust is partially melted and undergoes differentiation as it rises through the continental crust. Granitic rock is less dense than oceanic crust and composes the continents.
Is Andesitic rock is an igneous rock with a composition in between that of basaltic and granitic igneous rock.?
Yes, andesitic rock is an igneous rock that has a composition intermediate between basaltic and granitic rocks. It typically contains a mix of minerals such as plagioclase feldspar, amphibole, and sometimes biotite or quartz. Andesitic rocks are commonly associated with volcanic arcs and are often found in subduction zone environments. Their formation occurs from the partial melting of the Earth's mantle and the mixing of different magma types.
What is the difference of andesitic and andesite?
Andesite is a type of extrusive igneous rock with moderate levels of silica. Andesitic is an adjective used to describe volcanic material with the composition of andesite. For example, andesitic lava will cool to form andesite.
How are clastic limestone and fossiliferous limestone deposition different?
Clastic limestone is made up of fragments of pre-existing limestone, while fossiliferous limestone contains fossil remains. Clastic limestone forms through mechanical processes like erosion and sedimentation, while fossiliferous limestone results from the accumulation of marine organisms' shells and skeletons.
Is granite rock a basaltic granitic andesitic or volcanic?
Granite is classified as a granitic rock, which means it is an intrusive igneous rock primarily composed of quartz, feldspar, and mica. Unlike basalt, which is a volcanic rock formed from the rapid cooling of lava, granite forms from the slow crystallization of magma beneath the Earth's surface. It is not andesitic or basaltic; those terms refer to different compositions and types of volcanic rocks.
Where is limestone made?
Like most other sedimentary rocks, limestone is composed of grains; however, most grains in limestone are skeletal fragments of marine organisms such as coral or foraminifera.
What are the magmas the three families of igneous rock form from?
There are many different types of ignoues rock, but as a general description, mafic, felsic and intermediate rocks are formd from basaltic, granitic, and andesitic magmas respectively.
What are sedimentary rocks like?
Some sedimentary rocks are particles and rock fragments that become cemented together. Examples of sedimentary rocks are chalk, sandstone, limestone and shale.
