The Fine Grained Volcanic Equivalent Of Granite Is Basalt

The softest mineral on mr.

The fine grained volcanic equivalent of granite is basalt.

The fine grained equivalent of gabbro. Very dark green to black fine grained rock composed primarily of pyroxene and calcium rich plagioclase feldspar. Summary of basalt vs. Medium grey fine grained rock typically of volcanic orgin.

Basalt can form in a few days to months whereas granite plutons can take millions of years to cool and harden. Basalt is a fine grained. The tholeiitic and the alkali basalts. Basalt and gabbro are the extrusive and intrusive names for mafic igneous rocks and peridotite is ultramafic with komatiite as the fine grained extrusive equivalent.

Basalt extrusive igneous volcanic rock that is low in silica content dark in color and comparatively rich in iron and magnesium. 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. The fine grained rock texture that results from crystals too small to be see with the naked eye.

It contains more than 68 weight of silica in composition and is granular and coarse grained in texture. Basalts may be broadly classified on a chemical and petrographic basis into two main groups. Basalt is more common in oceanic crust while granite is more common in continental crust. Komatiite is a rare rock because volcanic material that comes directly from the mantle is not common although some examples can be found in ancient archean rocks 2.

Learn more about basalt in this article. Mauna loa in hawaii is situated on a. Fine grained equivalent to granite composed of mostly light colored silicates. Peridotite contains calcium rich plagioclase.

Granite is a coarse grained light colored intrusive igneous rock that contains mainly quartz feldspar and mica minerals. A tholeiitic basalt contains more conspicuous plagioclase and pyroxene crystals. Is the coarse grained equivalent of andesite. Gabbro is the fine grained equivalent to basalt.

It often forms as a frothy crust on the top of a lava flow or as material ejected from a volcanic vent and solidifying. Is felsic in composition after an explosive volcanic eruption on an island the surrounding sea is full of light gray floating rock. Its principal minerals are feldspars quartz and mica. Is the intrusive equivalent of andesite looks like grey granite.

The fine grained volcanic equivalent of granite is basalt. Basalt is an igneous volcanic rock that forms commonly in oceanic crust and parts of. The specimen above is about two inches five centimeters across. Basalt one example of an aphanitic rock with mafic composition.

Moh s scale is.