The Volcanic Fine Grained Compositional Equivalent Of Granite

The fine grained equivalent of granite.

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

Gabbro is a coarse grained mafic igneous rock made with mainly mafic minerals like pyroxene and only minor plagioclase. It is the fine grained compositional equivalent of diorite. You will be told if your answer is correct or not and will be given some comments. Gabbro is a major component of the lower oceanic crust.

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 rock that is the fine grained equivalent of granite is. Igneous rocks are classified according to their mineral content. A vesicular rock also known as cinder.

Its principal minerals are feldspars quartz and mica. A good example is granite which is a very hard plutonic rock. Therefore plutonic rocks have coarse grained crystals. Gabbro is the fine grained equivalent to basalt.

Mauna loa in hawaii is situated on a hot spot. The general physical appearance of a rock as observed in reflected light. Ultramafic rocks are dominated by olivine and or pyroxene. Click the circle by an answer with the mouse then click on the submit button to get a response.

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. One example of an aphanitic rock with felsic composition. Rhyolite lavas are the most common lavas seen at mid ocean ridges.

Material consisting of rock glass ash and scoria ejected during violent volcanic eruptions. Which rock is the fine grained equivalent of granite. Moh s scale is. The countertops in your kitchen might be made of granite as this rock is.

The softest mineral on mr.