Andesito

andesito

What is andesite and its characteristics?

Andesite is the extrusive equivalent of plutonic diorite. Characteristic of subduction zones, andesite represents the dominant rock type in island arcs. The average composition of the continental crust is andesitic. Along with basalts, andesites are a component of the Martian crust .

What is amygdaloidal andesite?

Sometimes, the presence of amygdaloidal andesite means that gas bubbles from the volcanic eruption leave voids that later fill with zeolite. They can also comprise almandine, hornblende, plagioclase, apatite, ilmenite and/or orthopyroxene. Andesite sits at 7 on the Mohs Scale of Hardness.

What is the difference between andesite and diorite?

Andesite is the extrusive equivalent of plutonic diorite. Characteristic of subduction zones, andesite represents the dominant rock type in island arcs. The average composition of the continental crust is andesitic.

What is an andesitic rock?

Characteristic of subduction zones, andesite represents the dominant rock type in island arcs. The average composition of the continental crust is andesitic. Along with basalts, andesites are a component of the Martian crust . The name andesite is derived from the Andes mountain range, where this rock type is found in abundance.

What is andesite?

What is Andesite? Andesite is the name of a family of fine-grained, extrusive igneous rocks that are usually light to dark gray in color. They have a mineral composition that is intermediate between granite and basalt.

What determines the chemical composition of an andesite?

The amount of silica contained in any rock determines its chemical composition. Geologists use this measure to identify rocks and understand their characteristics. While granite is known to be rich and basalt or rhyolite to be poor in their silica content, andesite rock is said to be having silica content, intermediate to these rocks.

What is the silica content of andesite?

Intermediate in silica content, it is usually gray in color and may be fine-grained or porphyritic. Andesite is the volcanic equivalent of diorite. It consists of the plagioclase feldspar minerals andesine and oligoclase, together with one or more dark, ferromagnesian minerals such as pyroxene and biotite.

What is an andesitic rock?

Characteristic of subduction zones, andesite represents the dominant rock type in island arcs. The average composition of the continental crust is andesitic. Along with basalts, andesites are a component of the Martian crust . The name andesite is derived from the Andes mountain range, where this rock type is found in abundance.

What is Andesite? Andesite is the name of a family of fine-grained, extrusive igneous rocks that are usually light to dark gray in color. They have a mineral composition that is intermediate between granite and basalt.

What is amygdaloidal basalt?

What is the hardness of andesite and diorite?

The hardness of Andesite is 7 and that of Diorite is 6-7. The types of Andesite are Icelandite whereas types of Diorite are Not Available. Streak of rock is the color of powder produced when it is dragged across an unweathered surface.

What is the composition of diorite?

Diorite is the name used for a group of coarse-grained igneous rocks with a composition between that of granite and basalt. It usually occurs as large intrusions, dikes, and sills within continental crust. ... This makes diorite a coarse-grained rock with a contrasting mix of black and white mineral grains.

Is diorite and rhyolite the same thing?

No. Diorite has the same composition as andesite while Rhyolite has the same composition as granite. What are 12 types of igneous rocks? What is an example of intrusive and extrusive igneous rock?

What is andesite and how is it formed?

Andesite is a fine-grained igneous rock that forms when the magma is erupted onto the surface and is crystallized quickly.

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