The Fine Grained Volcanic Equivalent Of Granite Is Basalt

The specimen above is about two inches five centimeters across.

The fine grained volcanic equivalent of granite is basalt.

Granite is a coarse grained light colored intrusive igneous rock that contains mainly quartz feldspar and mica minerals. The fine grained volcanic equivalent of granite is basalt. Peridotite contains calcium rich plagioclase. Basalts may be broadly classified on a chemical and petrographic basis into two main groups.

A tholeiitic basalt contains more conspicuous plagioclase and pyroxene crystals. Gabbro is the fine grained equivalent to basalt. The rock that is the fine grained equivalent of granite is. Its principal minerals are feldspars quartz and mica.

Basalt is more common in oceanic crust while granite is more common in continental crust. Basalt is an igneous volcanic rock that forms commonly in oceanic crust and parts of. Strato volcanoes are common around the margins of the pacific ocean. Is felsic in composition after an explosive volcanic eruption on an island the surrounding sea is full of light gray floating rock.

Basalt one example of an aphanitic rock with mafic composition. Is the coarse grained equivalent of andesite. Basalt extrusive igneous volcanic rock that is low in silica content dark in color and comparatively rich in iron and magnesium. The softest mineral on mr.

Mauna loa in hawaii is situated on a. The fine grained rock texture that results from crystals too small to be see with the naked eye. Learn more about basalt in this article. For igneous rocks crystal size is interpreted to imply which of the following.

The fine grained equivalent of gabbro. Basalt is a fine grained. How the magma felt during cooling. The tholeiitic and the alkali basalts.

Moh s scale is. Medium grey fine grained rock typically of volcanic orgin. 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. 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.

Very dark green to black fine grained rock composed primarily of pyroxene and calcium rich plagioclase feldspar. Fine grained equivalent to granite composed of mostly light colored silicates. It often forms as a frothy crust on the top of a lava flow or as material ejected from a volcanic vent and solidifying. It contains more than 68 weight of silica in composition and is granular and coarse grained in texture.

Summary of basalt vs.