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Rock dust is a pulverized rock, usually limestone, sprayed on walls inside underground coal mines to prevent coal dust explosions. The dust acts as a heat sink, keeps coal dust levels down, and also prevents the incidence of black lung disease. Rock dust has been used since the early 1900s, but technological improvements have occurred. [1]
Rock flour, artificial or natural, is a source of plant micronutrients (minerals trace elements) widely used in organic farming practices as a soil conditioner.Synonyms in this case include rock dust, rock powders, rock minerals, and mineral fines.
Coal dust is a fine-powdered form of coal which is created by the crushing, grinding, or pulverization of coal rock. Because of the brittle nature of coal, coal dust can be created by mining, transporting, or mechanically handling it.
Helenite, also known as Mount St. Helens obsidian, emerald obsidianite, and ruby obsidianite, is a glass made from the fused volcanic rock dust from Mount St. Helens and marketed as a gemstone. [1] [2] Helenite was first created accidentally after the eruption of Mount St. Helens in 1980.
Rock Dust Light Star is the seventh studio album by English band Jamiroquai. It was released on 1 November 2010 in the United Kingdom by Universal Music / Mercury Records and on 24 April 2012 in the United States by Executive Music Group .
Rock dust nourished soil micro-organisms whose protoplasm is the basis of all living things. When mixed with compost , the dust created rich, deep soils which could produce high growth vegetation free from pests and predators , at an accelerated rate.
Regolith (/ ˈ r ɛ ɡ ə l ɪ θ /) [1] [2] is a blanket of unconsolidated, loose, heterogeneous superficial deposits covering solid rock. It includes dust, broken ...
The use of rock has had a huge impact on the cultural and technological development of the human race. Rock has been used by humans and other hominids for at least 2.5 million years. [22] Lithic technology marks some of the oldest and continuously used technologies. The mining of rock for its metal content has been one of the most important ...