Which Best Describes the Size of the Crystals in Basalt

Which characteristic provides the best evidence. Often occur with basalt and other mafic igneous rocks D.

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Then it is cooled slowly so the rock that will form will of same composition but of larger grain size.

. Mark the one best answer answer choices. Most specimens are compact fine-grained and glassy. Because they are both dark mafic rocks gabbro and basalt can sometimes be confused with each other.

Basalt generally has small crystals. They can also be porphyritic with phenocrysts of olivine augite. Gabbro has larger crystals than basalt.

How heavy is the rock. The solidification of the melted rock occurred. Volume is very large comparable in size with granitic batholiths C.

Which statement best describes the igneous crustal bedrock below locations A B C and D. Which texture best describes an igneous rock that formed deep underground. Specimens are black in color and weather to dark green or brown.

Basalt is rich in iron and magnesium and is mainly composed of olivine pyroxene and plagioclase. Consist of very coarse grained crystals of potassium feldspar muscovite and quartz E. The flowchart illustrates the change from melted rock to basalt.

23 Which texture best describes an igneous rock that formed deep underground. Deeper magma cools more slowly and forms larger crystals. Granite and basalt are both igneous rocks.

A lighter in color melting and solidification hornblende and quartz C biotite and olivine D potassium feldspar and quartz B greater in density C more mafic in composition D more fine grained in texture 186. Which statement best describes how the rocks likely formed in this area. Basalt is heated up untill complete melting.

Rhyolite is the fine-grained equivalent of this igneous rock. Basalt is the most common rock on Earths surface. The rock is most likely.

Are basalt crystals large in size. Select the coarse-grained rock which is composed mainly of quartz and potassium feldspar from the list below. What size are the crystals in the rock.

The size of the minerals depends on the depth of the magma that formed the rock. While basalt crystals are much smaller as the crystals form very quickly because the magma comes out of the earth and cools quickly giving rise to fine-grained minerals. There is an area in Oregon where most of the ground is covered with basalt.

As the cooling is slow so the crystals will get time View the full answer. Often contain diamonds sapphires and rubies. DThe bedrock below A B C and D is mostly granite.

Some of the main minerals in igneous rocks are feldspar quartz olivine and mica. This igneous texture is characterized by two distinctively different crystal sizes. Compared to basalt granite is A olivine and pyroxene B.

However the large phaneritic crystals in gabbro versus the small aphanitic crystals in basalt consistently set. 1 glassy 2 vesicular 3 fine grained 4 coarse grained 24 A nonvesicular rock is made entirely of green 2-millimeter-diameter crystals that have a hardness of 65 and show fracture but not cleavage. The graph shows the relationship between the cooling time of magma and the size of the crystals produced.

Which graph best represents the comparison of the average grain sizes in basalt granite and rhyolite. Alow density Blight color Cfelsic composition Dvery coarse texture 11The photograph below shows the intergrown crystals of a pegmatite rock. Rocks that cool over a few months have microscopic mineral grains and are called extrusive.

Which graph correctly shows.

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