What Describes the Texture of Gabbro

Gabbros contain mainly ferromagnesian minerals and plagioclase the amount of ferromagnesian minerals equaling or exceeding that of the plagioclase. The rock gabbro shows the following textures.

Igneous Texture Relative Grain Size Google Search Rocks And Minerals Granite Igneous Rock

Colour Dark grey to black.

. Texture phaneritic medium to coarse grained. Group Plutonic Igneous Rock. Earth Sciences questions and answers.

It is an intrusive rock. Porphyric or a combination of large and finer-grained crystals which are very large crystals may be used to describe this coarse-grained texture. Earth Sciences questions and answers.

The mineral grains have glassy textures. The texture is coarse and the crystals are broad and transparent to the naked eye. Gabbro is a medium-grained ultramafic igneous rock.

Colour - dark grey to black. It is made up of plagioclase feldspar and pyroxene. Which of the following igenous rocks exhibit aphanitic texture.

Group - plutonic. Gabbro is mafic intrusive coarse-grained rock with allotriomorphic texture. Generally stratification of light and dark minerals layered gabbro significant amounts of olivine olivine gabbro or high percentage of coarse crystals of plagioclase feldspar löcogabbro.

Gabbro is a coarse-grained and usually dark-colored igneous rock. Texture - phaneritic medium to coarse grained. Gabbro obsidian granite and andesite.

In a porphyritic volcanic rock which mineral grains are the last to crystallize. Intermediate silica intermediate iron and magnesium aphanitic texture F. The rock is crystalline.

What is fragmental texture. Ophitic texture- Is one where random plagioclase laths are enclosed by pyroxene or olivine. Intermediate with a phaneritic texture crystals are so coarse that individual minerals can be distinguished with the naked eye Rhyolite.

The plagioclase-rich plutonic rocks from this locality were once known as eucrites but that term has been replaced by bytownite gabbro since eucrite is a term now reserved for meteorites thought to originate from the surface of the asteroid Vesta. The texture of a clastic rock. Lower silica high iron and magnesium aphanitic texture G.

Question 5 1 point Which rock type has highly vesicular texture. This coarse-grained igneous rock is a gabbro. Which of the following best describes an aphanitic texture.

Question 5 1 point Which rock type has highly vesicular texture. Cumulus- Here they are formed by the accumulation of crystals that settled out from a magma by the action of gravity they are in liquid formIt shows euhedral grain size. Gabbro is an intrusive igneous rock meaning that it forms from the solidification of magma.

Which of the following best describes an aphanitic texture. Mineral grains are of distinctly different sizes. As nouns the difference between rhyolite and gabbro is that rhyolite is geology an igneous volcanic extrusive rock of felsic composition with aphanitic to porphyritic texture while gabbro is rock a name originally given to a kind of serpentine and now generally used for a coarsely crystalline igneous rock consisting of lamellar pyroxene and labradorite.

Felsic with an aphanitic texture so fine-grained that their component mineral crystals are not detectable by the unaided eye. QUESTION 1 Which of the following igenous rocks is most likely one that is from an instrusive setting and has a felsic composition. Igneous rocks with similar composition are basalt extrusive equivalent of gabbro and diabase the same rock type could be named dolerite or microgabbro instead.

The rock is crystalline. Some pyroxene-plagioclase cumulates are essentially coarse-grained gabbro and may exhibit acicular crystal habits. Gabbro has a very rough texture referred to as coarse or phaneritic.

Gabbro is a dark medium- to coarse-grained intrusive igneous rock composed of calcium plagioclase pyroxene and minor olivine but no quartz. High silica low iron and magnesium aphanitic texture 1. Mineral grains are too small to be visible without a magnifying lens or microscope.

Basalt and gabbro commonly exhibit an equigranular texture. Lower silica high iron and magnesium phaneritic texture E. Gabbro is the plutonic equivalent of basalt.

It generally occurs as batholiths and laccoliths and is often found along mid-ocean ridges or in ancient mountains composed of compressed and uplifted oceanic crust. A texture of sedimentary rocks characterized by broken abraded or irregular particles in surface contact and resulting from the physical transport and deposition of such particles. Gabbro is usually equigranular in texture although it may also show ophitic texture with laths of plagioclase enclosed in pyroxene.

The rock consists of broken volcanic-rock and mineral fragments. It means that it formed as magma cooled slowly in the crust. Gabbro may be extremely coarse-grained to pegmatitic.

Gabbro Granite Scoria Obsidian Question 6 1 point Saved Which term applies to. Gabbro Granite Scoria. Basalt gabbro granite andesite QUESTION 2 Which of the following describes an igneous texture that includes large phenocrysts within a fine grained ground mass.

Granite From from Italian granito literally grained from grano grain from Latin granum.

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Aphanitic A Not Phaner Visible Rocks In Contrast To Phaneritic Rocks Typically Form From Lava Which Crystallize Rapidly O Igneous Rock Igneous Geology