The Volcanic Fine Grained Compositional Equivalent Of Granite

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

The volcanic fine grained compositional equivalent of granite.

Which rock is the fine grained equivalent of granite. A vesicular rock also known as cinder. The rock that is the fine grained equivalent of granite is. Intermediate rocks are roughly even mixtures of felsic minerals mainly plagioclase and mafic minerals mainly hornblende pyroxene.

Gabbro is the fine grained equivalent to basalt. 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 coarse grained mafic igneous rock made with mainly mafic minerals like pyroxene and only minor plagioclase.

Because mafic lava is more mobile it is less common than basalt. A good example is granite which is a very hard plutonic rock. 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. Mauna loa in hawaii is situated on a hot spot.

It contains more than 68 weight of silica in composition and is granular and coarse grained in texture. Igneous rocks are classified according to their mineral content. Heaton professor of earth sciences university of south dakota. Ultramafic rocks are dominated by olivine and or pyroxene.

Peridotite never contains olivine. Granite the equivalent of its extrusive volcanic rock type rhyolite is a very common type of intrusive igneous rock. Rhyolite lavas are the most common lavas seen at mid ocean ridges. Gabbro is a major component of the lower oceanic crust.

The general physical appearance of a rock as observed in reflected light. This chart illustrates the generalized mineral composition of igneous rocks. 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.

Moh s scale is. Therefore plutonic rocks have coarse grained crystals. The fine grained equivalent of granite. Click the circle by an answer with the mouse then click on the submit button to get a response.

The softest mineral on mr.