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That depends on what you are comparing it to. It has more dark minerals than rhyolite but fewer than basalt.
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∙ 9y ago
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What describes an andesite?
Andesite are fine-grainedextrusive, igneous volcanic rock composed essentially of plagioclase feldspar and one or more mafic minerals, such as hornblende, pyroxene or biotite.(Refer to Geology.com -Igneous Rocks)
What are ferrous minerals?
Ferrous minerals are iron-rich minerals that tend to be dark and heavy and generally crystallize at the highest temperatures and pressures (farther from the Earth's crust), causing them to contain less stable crystal structures and be more prone to rapid decomposition than non-ferrous minerals.
Are Basaltic lavas generally hotter and more viscous than andesite lavas?
Basaltic lavas are hotter, but less viscous than andesitic lavas.
Are Basaltic lavas are generally hotter and more viscous than andesite lavas?
No. Basaltic lavas are hotter and less viscous than andesitic lavas.
What is the difference between andesite and basalt?
Both andesite and basalt are volcanic rocks. Basalt is denser and generally darker than andesite. It has a lower silica content and more iron and magnesium. It most often forms from pahoehoe or a'a lava flows and occasionally scoria cinders. Andesite forms from more slica-rich material and is often found in the form of ash, pumice, or volcanic bombs. It may also sometimes form block lava flows, which are more viscous that a'a or pahoehoe.
Why are animals less stressed in the dark?
most animal i know are more stressed in the dark
Process in which minerals move from a more less crowded area to a crowded area to a less crowded area?
Diffusion
What is the difference in composition between a dacite and an andesite?
Dacite is more felsic in composition, containing more silica.
Compare the mineral composition of diorite with the mineral composition of andesite?
Both andesite and diorite are igneous rocks with an intermediate color index. Diorite; however, is intrusive and phaneritic, whereas andesite is aphanitic and extrusive. Andesite is said to be the extrusive equivalent of diorite. Diorite is made up of plagioclase feldspar and ferromagnesian mineral crystals, mainly amphibole. Contrarily, andesite may resemble rhyolite, meaning it presents a need for microscopic examination to see its mineral crystals. The two have a composition of plagioclase feldspar and amphibole, but it is much more difficult to detect in andesite.
Does an ore have more minerals than a crystal?
Generally an ore is a rock composed of various minerals. A crystal is normally a pure or nearly pure variety of a mineral. Ores are refined to extract one or more specific minerals which exist in the rock. The less desirable minerals are considered waste.
Can I get more examples of igneous rocks?
Peridotite, andesite, pumice, rhyolite, obsidian, granite, and basalt.
How is andesite different from rhyolite and basalt?
There are rocks that are extrusive (formed quickly on the surface of the earth) or intrusive (formed within the earth under slow cooling). Both types of extrusive or intrusive rocks can vary in composition from mafic (high iron and magnesium content) to silicic (less heavy ions like Fe and Mg, but with more of the lighter elements like Ca, Na, K, etc.). Extrusive rocks range from most mafic to less mafic as such: Basalt, Andesite, Rhyolite (and are all fine-grained b/c they cooled quickly). Intrusive rocks that cool more slowly and have larger crystals range from most mafic to less mafic as such: Gabbro, Diorite, Granite. Basalt and gabbro have a similar composition, just the crystal size differs from different cooling rates (same for rhyolite and granite).
