The Volcanic Fine Grained Compositional Equivalent Of Granite

It contains more than 68 weight of silica in composition and is granular and coarse grained in texture.

The volcanic fine grained compositional equivalent of granite.

Igneous rocks are classified according to their mineral content. Gabbro is the fine grained equivalent to basalt. 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.

Heaton professor of earth sciences university of south dakota. Material consisting of rock glass ash and scoria ejected during violent volcanic eruptions. The countertops in your kitchen might be made of granite as this rock is. Gabbro is a major component of the lower oceanic crust.

Gabbro is a coarse grained mafic igneous rock made with mainly mafic minerals like pyroxene and only minor plagioclase. Its principal minerals are feldspars quartz and mica. A vesicular rock also known as cinder. Peridotite never contains olivine.

The rock that is the fine grained equivalent of granite is. Igneous rocks and volcanoes practice exam questions written by timothy h. One example of an aphanitic rock with felsic composition. It is the fine grained compositional equivalent of diorite.

Intermediate rocks are roughly even mixtures of felsic minerals mainly plagioclase and mafic minerals mainly hornblende pyroxene. Therefore plutonic rocks have coarse grained crystals. The general physical appearance of a rock as observed in reflected light. This chart illustrates the generalized mineral composition of igneous rocks.

Because mafic lava is more mobile it is less common than basalt. Click the circle by an answer with the mouse then click on the submit button to get a response. 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. Ultramafic rocks are dominated by olivine and or pyroxene. Rhyolite lavas are the most common lavas seen at mid ocean ridges. The softest mineral on mr.

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