The Igneous Rock Granite Intermediate

In igneous petrology an intermediate composition refers to the chemical composition of a rock that has 52 63 wt sio 2 being an intermediate between felsic and mafic compositions.

The igneous rock granite intermediate. Typical intermediate rocks include andesite dacite and trachyandesite among volcanic rocks and diorite and granodiorite among plutonic rocks. Granite is a light colored igneous rock with grains large enough to be visible with the unaided eye. It forms from the slow crystallization of magma below earth s surface. Black or dark brown cooling rate.

Intermediate rocksare roughly even mixtures of felsic minerals mainly plagioclase and mafic minerals mainly hornblende pyroxene and or biotite. Granite is composed mainly of quartz and feldspar with minor amounts of mica amphiboles and other minerals this mineral composition usually gives granite a red pink gray or white color with dark mineral. Intermediate andesitic to felsic rhyolitic color. Peridotite is a coarse grained intrusive igneous rock that is composed almost entirely of olivine.

Which of the following is an aphanitic igneous rock. Granite is felsic andesite is intermediate. Pumice is a low density light colored felsic volcanic rock. Felsic rocksare mostly feldspar especially k feldspar at least 10 quartz and less than 15 mafic minerals biotite hornblende.

Magma exists strictly below earth s surface whereas lava is found on earth s surface. An igneous rock fault or other geologic feature must be younger than any rock across which it cuts. Granite is a coarse grained light colored intrusive igneous rock that contains mainly quartz feldspar and mica minerals. Andesite and diorite likewise refer to extrusive and intrusive intermediate rocks with dacite and granodiorite applying to those rocks with composition between felsic and intermediate.

Rhyolite refers to the volcanic and felsic igneous rocks and granite refer to intrusive and felsic igneous rocks. Being mostly quartz and feldspar the granites are light in colour. How does magma differ from lava. The hardest mineral on earth according to moms hardness scale is.

Of the hundreds of named igneous rocks consider the three rocks granite andesite and basalt. It commonly forms as a frothy upper surface on silicic lavas. Law of cross cutting. Felsic igneous rocks containing a excessive silica content more than 63 sio2 examples granite and rhyolite intermediate igneous rocks containing among fifty two 63 sio2 example andesite and dacite mafic igneous rocks have low silica forty five fifty two and typically high iron magnesium content material example gabbro and basalt.

Conchoidal curved glass like fractures. There is little or no quartz. Each has a different composition according to where its magma collected. Which of the following is an example of an igneous rock of intermediate composition a basalt b granite c diorite d peridoite.