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.
Diorite is the intrusive equivalent to the extrusive rock andesite.
According to the New York State Earth Science Reference Tables, the two rocks that have the same general chemical and mineral compositions are igneous rocks called andesite and diorite. They both have a composition that consists of quartz, plagioclase feldspar, biotite, pyroxene, and amphibole.
basalt and dacite, and ranges from 57 to 63% silicon dioxide (SiO2)
biotite mica
Several minerals are evaporites, and therefore, there is not just one mineral composition but a different one for each mineral.
Diorite is the intrusive equivalent to the extrusive rock andesite.
According to the New York State Earth Science Reference Tables, the two rocks that have the same general chemical and mineral compositions are igneous rocks called andesite and diorite. They both have a composition that consists of quartz, plagioclase feldspar, biotite, pyroxene, and amphibole.
basalt and dacite, and ranges from 57 to 63% silicon dioxide (SiO2)
No. Andesite is an extrusive igneous rock.
plagioclase feldspar, pyroxene, horneblende (amphibole)
biotite mica
Each known mineral has a specific chemical composition.
First, diorite is an intrusive igneous rock, meaning it solidified from magma under the surface. This extra time spent underground cooling allowed it to have larger crystals than a rock formed from magma cooling above ground. Diorite is considered an intermediate rock, mostly composed of the mineral plagioclase feldspar, with biotite mica, hornblende, pyroxene, quartz, and olivine. Its mineralogy causes it to be fairly dark in color, ranging from gray to green in tone. Diorite rock is very durable, and ancient structures and artwork created with it still survive.
The color of a mineral sample is determined by its chemical composition
Several minerals are evaporites, and therefore, there is not just one mineral composition but a different one for each mineral.
Andesite (pronounced /ˈændəsaɪt/) is an extrusive igneous, volcanic rock, of intermediate composition, with aphanitic to porphyritic texture. In a general sense, it is the intermediate type between basalt and dacite. The mineral assemblage is typically dominated by plagioclase plus pyroxene and/or hornblende. Magnetite, zircon, apatite, ilmenite, biotite, and garnet are common accessory minerals. Alkali feldspar may be present in minor amounts. The quartz-feldspar abundances in andesite and other volcanic rocks are illustrated in QAPF diagrams. Relative alkali and silica contents are illustrated in TAS diagrams. (Source wikipedia)
the composition of luster is limstone