Since the rate of cooling and solidification of magmas inside the earth.
Basalts and granites.
It most commonly forms as an extrusive rock such as a lava flow but can also form in small intrusive bodies such as an igneous dike or a thin sill it has a composition similar to gabbro the difference between basalt and gabbro is that basalt is a fine grained rock while.
Earth contains three kinds of rocks namely igneous rocks sedimentary rocks and metamorphic rocks basalt and granite are two types of igneous rocks.
Granite makes up the cores of continents and much of the bulk of major.
The tholeiitic and the alkali basalts.
Below 1200 the saturation surface turns down sharply and becomes nearly temperature independent.
If instead they form by melting preexisting crustal rocks they represent a.
Granites are the example of the plutonic intrusive igneous rocks which are formed deep within the earth.
Learn more about basalt in this article.
A basalt is about 53 sio2 whereas granite is 73.
The difference between granites and basalts is in silica content and their rates of cooling.
The saturation surface in the basalt shows a strong temperature dependence from 1400 to 1200 c.
Basalts may be broadly classified on a chemical and petrographic basis into two main groups.
All rocks of igneous origin consist of magma or molten earth that finds its way up to.
Intrusive slowly cooled inside the crust.
Basalt extrusive igneous volcanic rock that is low in silica content dark in color and comparatively rich in iron and magnesium.
The key difference between basalt and granite is that basalt is mostly occurring on ocean floors while granite is in the crust of the earth in all continents.
Granites that form the thick framework of the all continental crusts and also of those defined as anomalous oceanic crusts were mainly extracted in the archean from the upper mantle and later reworked metamorphism anatexis in later.
Granite is an intrusive igneous rock with a felsic composition.
Plutonic rock formed in the earth.
Igneous rocks are formed by the crystallisation of a magma.
If i type granites are descended from basalts then their formation represents net growth of the continents and net removal from the mantle of elements that are highly concentrated in the crust such as the heat producing radioactive isotopes 40 k and 238 u.
Basalt is a dark colored fine grained igneous rock composed mainly of plagioclase and pyroxene minerals.