The Volcanic Fine Grained Compositional Equivalent Of Granite

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

The volcanic fine grained compositional equivalent of granite.

Its principal minerals are feldspars quartz and mica. Material consisting of rock glass ash and scoria ejected during violent volcanic eruptions. Therefore plutonic rocks have coarse grained crystals. Mauna loa in hawaii is situated on a hot spot.

Gabbro is a coarse grained mafic igneous rock made with mainly mafic minerals like pyroxene and only minor plagioclase. Rhyolite lavas are the most common lavas seen at mid ocean ridges. Heaton professor of earth sciences university of south dakota. The softest mineral on mr.

Igneous rocks are classified according to their mineral content. It is the fine grained compositional equivalent of diorite. One example of an aphanitic rock with felsic composition. The general physical appearance of a rock as observed in reflected light.

Moh s scale is. This chart illustrates the generalized mineral composition of igneous rocks. It contains more than 68 weight of silica in composition and is granular and coarse grained in texture. The fine grained equivalent of granite.

Intermediate rocks are roughly even mixtures of felsic minerals mainly plagioclase and mafic minerals mainly hornblende pyroxene. Granite the equivalent of its extrusive volcanic rock type rhyolite is a very common type of intrusive igneous rock. A vesicular rock also known as cinder. Click the circle by an answer with the mouse then click on the submit button to get a response.

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. 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.

Ultramafic rocks are dominated by olivine and or pyroxene. Because mafic lava is more mobile it is less common than basalt. Mafic rocks are dominated by plagioclase and pyroxene even if you can t see them with the naked eye and smaller amounts of olivine. You will be told if your answer is correct or not and will be given some comments.

A good example is granite which is a very hard plutonic rock.