The Volcanic Fine Grained Compositional Equivalent Of Granite

Igneous rocks and volcanoes practice exam questions written by timothy h.

The volcanic fine grained compositional equivalent of granite.

Material consisting of rock glass ash and scoria ejected during violent volcanic eruptions. Igneous rocks are classified according to their mineral content. The general physical appearance of a rock as observed in reflected light. Granite the equivalent of its extrusive volcanic rock type rhyolite is a very common type of intrusive igneous rock.

Peridotite never contains olivine. Heaton professor of earth sciences university of south dakota. Intermediate rocks are roughly even mixtures of felsic minerals mainly plagioclase and mafic minerals mainly hornblende pyroxene. Moh s scale is.

A vesicular rock also known as cinder. Therefore plutonic rocks have coarse grained crystals. A good example is granite which is a very hard plutonic rock. It contains more than 68 weight of silica in composition and is granular and coarse grained in texture.

Its principal minerals are feldspars quartz and mica. The fine grained equivalent of granite. It is the fine grained compositional equivalent of diorite. The rock that is the fine grained equivalent of granite is.

Gabbro is the fine grained equivalent to basalt. Granites and rhyolites compositionally equivalent to granite but of a fine grain size are composed mainly of orthoclase feldspar quartz plagioclase feldspar mica and amphibole. Rhyolite lavas are the most common lavas seen at mid ocean ridges. The countertops in your kitchen might be made of granite as this rock is.

You will be told if your answer is correct or not and will be given some comments. Gabbro is a coarse grained mafic igneous rock made with mainly mafic minerals like pyroxene and only minor plagioclase. Which rock is the fine grained equivalent of granite. Mafic rocks are dominated by plagioclase and pyroxene even if you can t see them with the naked eye and smaller amounts of olivine.

Mauna loa in hawaii is situated on a hot spot. One example of an aphanitic rock with felsic composition. Click the circle by an answer with the mouse then click on the submit button to get a response. This chart illustrates the generalized mineral composition of igneous rocks.

Gabbro is a major component of the lower oceanic crust.