What type of rock is dolostone?

Dolostone is a fine-grained sedimentary rock composed primarily of dolomite, a calcium and magnesium carbonate mineral. Dolostone is similar to limestone and is in some cases formed secondarily from chemically-altered limestone.

Is dolostone a metamorphic rock?

It is the primary component of the sedimentary rock known as dolostone and the metamorphic rock known as dolomitic marble. Limestone that contains some dolomite is known as dolomitic limestone.

Is dolostone a clastic sedimentary rock?

Dolomite (also known as “dolostone” and “dolomite rock”) is a chemical sedimentary rock that is very similar to limestone. It is thought to form when limestone or lime mud is modified by magnesium-rich ground water.

Is dolostone igneous sedimentary or metamorphic?

sedimentary rock

Dolomite, also known as “dolostone” and “dolomite rock,” is a sedimentary rock composed primarily of the mineral dolomite, CaMg(CO₃)₂. Dolomite is found in sedimentary basins worldwide. It is thought to form by the postdepositional alteration of lime mud and limestone by magnesium-rich groundwater.

Is dolostone a non clastic sedimentary rock?

Limestones and dolostones (dolomites) make up the bulk of the nonterrigenous sedimentary rocks. Limestones are for the most part primary carbonate rocks. They consist of 50 percent or more calcite and aragonite (both CaCO₃).

Is dolostone a chemical sedimentary rock?

Dolostone is quite similar to limestone, but is composed mostly of the mineral dolomite (CaMg(CO3)2). Both are sedimentary rocks that occur as thin to massive beds of fine- to coarse-grained rock.

How do I identify a dolostone?

Physical properties. Dolomite crystals are colourless, white, buff-coloured, pinkish, or bluish. Granular dolomite in rocks tends to be light to dark gray, tan, or white. Dolomite crystals range from transparent to translucent, but dolomite grains in rocks are typically translucent or nearly opaque.

Is dolostone and dolomite the same thing?

Dolostone, sometimes called dolomite, is similar to limestone in many ways. The most important difference between the two rocks is that the main constituent of dolostone is the mineral dolomite rather than calcite as in limestone.

What is the difference between limestone and dolostone?

Limestone is made of calcium carbonate. Dolomite is made of calcium magnesium carbonate.

What type of rock is granodiorite?

Granite and granodiorite are intrusive igneous rocks that slowly cool deep underground in magma chambers called plutons.

Is dolostone a mineral or a rock?

Dolostone is a fine-grained sedimentary rock composed primarily of dolomite, a calcium and magnesium carbonate mineral. Dolostone is similar to limestone and is in some cases formed secondarily from chemically-altered limestone.

Is granodiorite a sedimentary rock?

Granodiorite is intrusive igneous rock that have phaneritic textured. The grain sizes are visible to the naked eye. Granodiorite formation is slow cooling crystallization below Earth’s surface.

What is granitoid rock?

A granitoid is a generic term for a diverse category of coarse-grained igneous rocks that consist predominantly of quartz, plagioclase, and alkali feldspar. Granitoids range from plagioclase-rich tonalites to alkali-rich syenites and from quartz-poor monzonites to quartz-rich quartzolites.

Is granodiorite a granitoid?

Granitoid with a rough balance of both feldspars is monzogranite. Granitoid with mostly (at least 65%) plagioclase is granodiorite.

Is tonalite a granitoid?

Classification of GranitoidHide



Rocks in sections 2 (alkali-feldspar granite), 3 (granite), 4 (granodiorite) and 5 (tonalite) on the QAPF diagram. Section 3 can be divided into 3a (syenogranite) and 3b (monzogranite).

Is monzonite a rock?

monzonite, intrusive igneous rock that contains abundant and approximately equal amounts of plagioclase and potash feldspar; it also contains subordinate amounts of biotite and hornblende, and sometimes minor quantities of orthopyroxene.

Is quartz a Phaneritic?

Quartz is harder to spot in the photo. The close-up view (click on image) shows that all minerals are about the same size and are complexly intergrown. This is an example of an equigranular phaneritic texture.

What type of rock is chert?

Chert is a sedimentary rock consisting almost entirely of silica (SiO ₂), and can form in a variety of ways. Biochemical chert is formed when the siliceous skeletons of marine plankton are dissolved during diagenesis, with silica being precipitated from the resulting solution.

What type of igneous rock is andesite?

Andesite is a fine-grained, extrusive igneous or volcanic rock. It is dark grey and made up of equal amounts of light and dark minerals, although the crystals are too small to be seen without a magnifier. Occasionally andesite may contain some larger crystals.

What type of rock is peridotite?

Peridotite

What is andesite metamorphic rock?

Andesite most commonly denotes fine-grained, usually porphyritic rocks; in composition these correspond roughly to the intrusive igneous rock diorite and consist essentially of andesine (a plagioclase feldspar) and one or more ferromagnesian minerals, such as pyroxene or biotite.

Is rhyolite an igneous rock?

rhyolite, extrusive igneous rock that is the volcanic equivalent of granite. Most rhyolites are porphyritic, indicating that crystallization began prior to extrusion.

Is rhyolite a sedimentary rock?

Rhyolite is an extrusive igneous rock with a very high silica content. It is usually pink or gray in color with grains so small that they are difficult to observe without a hand lens.

What type of rock is rhyolite Brainly?

Rhyolite is an extrusive igneous rock, formed from magma rich in silica that is extruded from a volcanic vent to cool quickly on the surface rather than slowly in the subsurface.

What is rhyolite stone?

Rhyolite is a volcanic rock similar in its chemistry to granite. Most rhyolites are porphyritic, with larger crystals in a fine-grained matrix of crystals too small to be seen with the naked eye. Rhyolite is silica-rich, giving it a light range of color, often found with banding throughout.

What is a rhyolite rock used for?

Rhyolite is suitable as aggregate, fill-in construction, building material and road industries, decorative rock in landscaping, cutting tool, abrasive and jewelry.

How do you classify rhyolite?

Classification of Rhyolite



A group of extrusive igneous rocks, typically porphyritic and commonly exhibiting flow texture, with phenocrysts of quartz and alkali feldspar in a glassy to cryptocrystalline groundmass; also, any rock in that group; the extrusive equivalent of granite.