The Volcanic Fine Grained Compositional Equivalent Of Granite

Peridotite never contains olivine.

The volcanic fine grained compositional equivalent of granite.

Gabbro is the fine grained equivalent to basalt. It contains more than 68 weight of silica in composition and is granular and coarse grained in texture. One example of an aphanitic rock with felsic composition. Mafic rocks are dominated by plagioclase and pyroxene even if you can t see them with the naked eye and smaller amounts of olivine.

The countertops in your kitchen might be made of granite as this rock is. Which rock is the fine grained equivalent of granite. This chart illustrates the generalized mineral composition of igneous rocks. Rhyolite lavas are the most common lavas seen at mid ocean ridges.

Mauna loa in hawaii is situated on a hot spot. Moh s scale is. It is the fine grained compositional equivalent of diorite. The general physical appearance of a rock as observed in reflected light.

Gabbro is a major component of the lower oceanic crust. Igneous rocks are classified according to their mineral content. The rock that is the fine grained equivalent of granite is. Click the circle by an answer with the mouse then click on the submit button to get a response.

Material consisting of rock glass ash and scoria ejected during violent volcanic eruptions. A vesicular rock also known as cinder. Heaton professor of earth sciences university of south dakota. Therefore plutonic rocks have coarse grained crystals.

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. The fine grained equivalent of granite. Gabbro is a coarse grained mafic igneous rock made with mainly mafic minerals like pyroxene and only minor plagioclase. You will be told if your answer is correct or not and will be given some comments.

Igneous rocks and volcanoes practice exam questions written by timothy h. Ultramafic rocks are dominated by olivine and or pyroxene. Intermediate rocks are roughly even mixtures of felsic minerals mainly plagioclase and mafic minerals mainly hornblende pyroxene. Because mafic lava is more mobile it is less common than basalt.

Its principal minerals are feldspars quartz and mica.