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Metamorphosed basalt (metabasalt) creates ortho-amphibolite and other chemically appropriate lithologies create para-amphibolite. Although tremolite is a metamorphic amphibole, it is most commonly derived from highly metamorphosed ultramafic rocks , and thus tremolite-talc schist is not generally considered a variety of amphibolite.
The facies are named after the metamorphic rock formed under those facies conditions from basalt. [79] The particular mineral assemblage is somewhat dependent on the composition of that protolith, so that (for example) the amphibolite facies of a marble will not be identical with the amphibolite facies of a pellite.
Amphibole ()Amphibole (/ ˈ æ m f ə b oʊ l / AM-fə-bohl) is a group of inosilicate minerals, forming prism or needlelike crystals, [1] composed of double chain SiO 4 tetrahedra, linked at the vertices and generally containing ions of iron and/or magnesium in their structures.
They can also form from tectonic processes such as continental collisions, which cause horizontal pressure, friction, and distortion. Metamorphic rock can be formed locally when rock is heated by the intrusion of hot molten rock called magma from the Earth's interior. The study of metamorphic rocks (now exposed at the Earth's surface following ...
Dan Offner, a partner for the video game industry analysis firm Loeb & Loeb believed that similar laws and regulations will be sought by State and Federal governments, as "the regulation of mature content with respect to minors as a hot button issue for the Federal Trade Commission and the various state governments". [66]
According to IDC, mobile game revenue shot up 32.8% to $99.9 billion in 2020, while digital PC and Mac game spending jumped 7.4% to 35.6 billion. Home console game spending, meanwhile, soared 33.9 ...
Voluntary rating systems adopted by the video game industry, such as the ESRB rating system in the United States and Canada (established in 1994), [7] and the Pan European Game Information (PEGI) rating system in Europe (established in 2003), are aimed at informing parents about the types of games their children are playing (or are asking to play).
The video game industry is the tertiary and quaternary sectors of the entertainment industry that specialize in the development, marketing, distribution, monetization, and consumer feedback of video games. The industry encompasses dozens of job disciplines and thousands of jobs worldwide. [1] The video game industry has grown from niche to ...