The Volcanic Fine Grained Compositional Equivalent Of Granite

Intermediate rocks are roughly even mixtures of felsic minerals mainly plagioclase and mafic minerals mainly hornblende pyroxene.

The volcanic fine grained compositional equivalent of granite.

Which rock is the fine grained equivalent of granite. It is the fine grained compositional equivalent of diorite. Ultramafic rocks are dominated by olivine and or pyroxene. Gabbro is a coarse grained mafic igneous rock made with mainly mafic minerals like pyroxene and only minor plagioclase.

Gabbro is a major component of the lower oceanic crust. The countertops in your kitchen might be made of granite as this rock is. Therefore plutonic rocks have coarse grained crystals. Rhyolite lavas are the most common lavas seen at mid ocean ridges.

Mafic rocks are dominated by plagioclase and pyroxene even if you can t see them with the naked eye and smaller amounts of olivine. 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. Material consisting of rock glass ash and scoria ejected during violent volcanic eruptions. Because mafic lava is more mobile it is less common than basalt.

The softest mineral on mr. The general physical appearance of a rock as observed in reflected light. It contains more than 68 weight of silica in composition and is granular and coarse grained in texture. You will be told if your answer is correct or not and will be given some comments.

Granite the equivalent of its extrusive volcanic rock type rhyolite is a very common type of intrusive igneous rock. The rock that is the fine grained equivalent of granite is. Igneous rocks are classified according to their mineral content. Peridotite never contains olivine.

Its principal minerals are feldspars quartz and mica. A good example is granite which is a very hard plutonic rock. One example of an aphanitic rock with felsic composition. The fine grained equivalent of granite.

This chart illustrates the generalized mineral composition of igneous rocks. Gabbro is the fine grained equivalent to basalt. Mauna loa in hawaii is situated on a hot spot. Click the circle by an answer with the mouse then click on the submit button to get a response.

Igneous rocks and volcanoes practice exam questions written by timothy h.