The Volcanic Fine Grained Compositional Equivalent Of Granite

Rhyolite lavas are the most common lavas seen at mid ocean ridges.

The volcanic fine grained compositional equivalent of granite.

Gabbro is the fine grained equivalent to basalt. A vesicular rock also known as cinder. Intermediate rocks are roughly even mixtures of felsic minerals mainly plagioclase and mafic minerals mainly hornblende pyroxene. It contains more than 68 weight of silica in composition and is granular and coarse grained in texture.

One example of an aphanitic rock with felsic composition. The fine grained equivalent of granite. Igneous rocks and volcanoes practice exam questions written by timothy h. Granite the equivalent of its extrusive volcanic rock type rhyolite is a very common type of intrusive igneous rock.

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. A good example is granite which is a very hard plutonic rock. Peridotite never contains olivine.

The general physical appearance of a rock as observed in reflected light. It is the fine grained compositional equivalent of diorite. The countertops in your kitchen might be made of granite as this rock is. Material consisting of rock glass ash and scoria ejected during violent volcanic eruptions.

Heaton professor of earth sciences university of south dakota. Its principal minerals are feldspars quartz and mica. This chart illustrates the generalized mineral composition of igneous rocks. Therefore plutonic rocks have coarse grained crystals.

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. Gabbro is a major component of the lower oceanic crust. Which rock is the fine grained equivalent of granite. The rock that is the fine grained equivalent of granite is.

Ultramafic rocks are dominated by olivine and or pyroxene. The softest mineral on mr. 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.

Because mafic lava is more mobile it is less common than basalt.