The Volcanic Fine Grained Compositional Equivalent Of Granite

Gabbro is a coarse grained mafic igneous rock made with mainly mafic minerals like pyroxene and only minor plagioclase.

The volcanic fine grained compositional equivalent of granite.

It is the fine grained compositional equivalent of diorite. Igneous rocks and volcanoes practice exam questions written by timothy h. Material consisting of rock glass ash and scoria ejected during violent volcanic eruptions. It contains more than 68 weight of silica in composition and is granular and coarse grained in texture.

This chart illustrates the generalized mineral composition of igneous rocks. Therefore plutonic rocks have coarse grained crystals. Peridotite never contains olivine. Gabbro is a major component of the lower oceanic crust.

Which rock is the fine grained equivalent of granite. 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. A good example is granite which is a very hard plutonic rock. Gabbro is the fine grained equivalent to basalt.

Intermediate rocks are roughly even mixtures of felsic minerals mainly plagioclase and mafic minerals mainly hornblende pyroxene. Heaton professor of earth sciences university of south dakota. Its principal minerals are feldspars quartz and mica. The fine grained equivalent of granite.

You will be told if your answer is correct or not and will be given some comments. A vesicular rock also known as cinder. Mauna loa in hawaii is situated on a hot spot. Ultramafic rocks are dominated by olivine and or pyroxene.

Rhyolite lavas are the most common lavas seen at mid ocean ridges. Click the circle by an answer with the mouse then click on the submit button to get a response. Mafic rocks are dominated by plagioclase and pyroxene even if you can t see them with the naked eye and smaller amounts of olivine. Moh s scale is.

Igneous rocks are classified according to their mineral content. Because mafic lava is more mobile it is less common than basalt. 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.

The countertops in your kitchen might be made of granite as this rock is.