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What is the difference between plagioclase and orthoclase rock?
Wiki User
∙ 13y ago
They are identical (hardness, streak, ect) barring the chemical composition however plagioclase has striations on the cleavage surface.
Wiki User
∙ 13y ago
Wiki User
∙ 10y agoPlagioclase: feldspar breaks by cleaving and has 2 cleavage planes at right angles to each other;
Quarts: does not have cleavage planes and breaks by concoidal fracture;
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A certain igneous rock contains about 25 percent dark silicate minerals The remainder of the rock is mostly plagioclase feldspar What type of composition does tthis igneous rock have?
ultramafic
What is the difference between rice crispy treat and sedimentary rock?
The difference between a rice crispy treat and sedimentary rock is that you can enjoy eating the treat than having to chew on some dirt and rock. Put that in your juice box and Suck It!
What is the difference between the two types of metamorphic rocks?
how is metamorphic rock different than intrusive rock
What intrusive igneous rock is composed of 18 percent olvine 48 percent pyroxene and 34 percent plagioclase?
Gabbro is made of these minerals. The proportions can vary.
What the difference between sandstone and tuff?
Sandstone is a sedimentary rock formed when sand weathered from preexisting rock is cemented together. Tuff is an igneous rock formed from volcanic ash.
What is an adamellite?
An adamellite is another word for a monzonite, a form of intrusive igneous rock composed mostly of plagioclase and orthoclase.
What rocks are felsic?
Felsic rock are igneous rocks that are rich of quartz, orthoclase and plagioclase minerals. Here is the list of felsic rocks: granites, rhyolites, aplites, and pegmatites.
What type of rock is a plagioclase?
Plagioclase is not actually a rock, but a member of the feldspar family of minerals, and a major rock forming silicate mineral.
What three mineral are most commonly found in the igneous rock granite?
Rocks are composed of minerals. Three minerals found in granite are quartz, feldspar and mica. They are present in granite in differing amounts so all granite doesn't look the same.
Would quartz or plagioclase be more likely to form well-shaped crystal in an igneous rock?
Plagioclase.
What is some chemical formula for orthoclase rock?
KAlSi3O8 and NaAlSi3O8
Where is the mineral orthoclase found?
The mineral orthoclase is found all over the world. It can also be found in Granite rock. It would be the pink or white crystals in it.
Is orthoclase a rock or a mineral?
Orthoclase feldspar is a tectosilicate mineral which is most commonly found in igneous rock. It has a Mohs hardness of 6 and has two cleavage planes which occur at right angles to each other. It is the potassium endmember of the feldspar group of minerals and is also referred to as alkali feldspar or K-spar. Orthoclase will appear in colors from white to deep pink, but has a white streak.
Why does gabbro have a higher chemical weathering rate than granite?
Gabbro is mafic intrusive igneous rock and contains olivine, pyroxene, plagioclase and amphibole. These minerals are unstable at low pressure temperature conditions. In contrast, granite is felsic intrusive igneous rock and contains high amounts of quartz and orthoclase. Stability of minerals are increasing top to bottom in Bowen's Reaction Series.
Essential minerals of rock basalt?
anorthite-rich plagioclase, feldspar and augite
What is a coarse-grained rock composed of intermediate plagioclase feldspar and pyroxene?
Diorite
Dark fine grainmed volcanic rock consisting of plagioclase feldspar?
andesite
