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Slate is a fine-grained, foliated, homogeneous, metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade, regional metamorphism.
French geologists subsequently added metasomatism, the circulation of fluids through buried rock, to the list of processes that help bring about metamorphism. However, metamorphism can take place without metasomatism ( isochemical metamorphism ) or at depths of just a few hundred meters where pressures are relatively low (for example, in ...
Elemental iron is virtually absent on the Earth's surface except as iron-nickel alloys from meteorites and very rare forms of deep mantle xenoliths.Although iron is the fourth most abundant element in Earth's crust, composing about 5% by weight, [4] the vast majority is bound in silicate or, more rarely, carbonate minerals, and smelting pure iron from these minerals would require a prohibitive ...
Lanternfish account for as much as 65 percent of all deep sea fish biomass and are largely responsible for the deep scattering layer of the world's oceans.. The phantom bottom is caused by the sonar misinterpreting as the ocean floor a layer of small seagoing creatures that congregate between 1,000 and 1,500 feet (300 and 460 m) below the surface.
Image showing the six most common speleothems The "Witch’s Finger" in the Carlsbad Caverns, New Mexico. A stalagmite (UK: / ˈ s t æ l ə ɡ ˌ m aɪ t /, US: / s t ə ˈ l æ ɡ m aɪ t /; from Greek σταλαγμίτης (stalagmítēs); from Ancient Greek σταλαγμίας (stalagmías) 'dropping, trickling' and -ίτης (-ítēs) 'one connected to, a member of') [1] is a type of ...
Chasiv Yar (Ukrainian: Часів Яр, pronounced [ˈt͡ʃɑ.s⁽ʲ⁾iu̯ jɑr]) is a city in Bakhmut Raion, Donetsk Oblast, Ukraine.It is located 10 kilometres (6.2 mi) west of Bakhmut [10] and is the center of Chasiv Yar urban hromada.
South Deep Mine has experienced a challenging period over recent years with various steps taken to revise its cost base in order to reduce losses [2] (of approximately US$292m over a five-year period [3]).
Deep State is a British espionage thriller television series, written and created by Matthew Parkhill and Simon Maxwell, first broadcast in the United Kingdom on Fox on 5 April 2018. [5]