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Felsic refers to silicate minerals, magma, and rocks which are enriched in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium. Molten felsic magma and lava is more viscous than molten mafic magma and lava. Felsic magmas and lavas have lower temperatures of melting and solidification than mafic magmas and lavas.
It is commonly found within the margins of rhyolitic lava flows known as obsidian flows. These flows have a high content of silica , giving them a high viscosity . The high viscosity inhibits diffusion of atoms through the lava, which inhibits the first step ( nucleation ) in the formation of mineral crystals .
The calc-alkaline magma series is one of two main subdivisions of the subalkaline magma series, the other subalkaline magma series being the tholeiitic series. A magma series is a series of compositions that describes the evolution of a mafic magma, which is high in magnesium and iron and produces basalt or gabbro, as it fractionally crystallizes to become a felsic magma, which is low in ...
Deposits of rare earth metals, the crucial ingredients in electric vehicles and wind turbines, could be present in ancient volcanoes across the world
The dispersal of extra magma warmed the water in the ocean, and was a conducive environment for calcareous-shelled organisms, which after death sank to the bottom of the ocean floor creating thick deposits of limestone. In addition to the displacement of water, an increase in injected magma raised CO₂ levels to around 2-6 times the current ...
The study of soil taken from a less-studied region of the moon suggests the presence of remnants of a former ocean of magma, according to a study published Wednesday in Nature. ... lander module ...
Texas has been the leading state in petroleum production since discovery of the Spindletop oil field in 1901. [11] As of October 2017, the State of Texas (if treated as its own nation) is the 7th largest oil producing nation in the world, with production totaling approximately 3.78 million barrels (600 thousand cubic meters ) per day of oil ...
In 2021, chorioactis geaster became the official state mushroom of Texas. Inks Lake State Park is located about 70 miles northwest of Austin. Rare new mushroom with ‘exceptional medicinal ...