depth of mining
101Oil shale extraction — is an industrial process in which kerogen mdash;a mixture of organic chemical compounds (including hydrocarbons) found in oil shale mdash;is converted into synthetic crude oil through pyrolysis. In pyrolysis, oil shale is heated in the absence of …
102Indian Ocean — an ocean S of Asia, E of Africa, and W of Australia. 28,357,000 sq. mi. (73,444,630 sq. km). * * * Indian Ocean Introduction Indian Ocean Background: The Indian Ocean is the third largest of the world s five oceans (after the Pacific Ocean and… …
103Turquoise — For other uses, see Turquoise (disambiguation). Turquoise Turquoise (tumble finished) one inch (25 mm) long. This pebble is greenish and therefore low grade General …
104Anthony Francis Lucas — Infobox Scientist name = Antun Lučić birth date = birth date|1855|9|9|mf=y birth place = Split, Habsburg Empire (modern day Croatia) nationality = Habsburg Monarchy (1855 1885), United States (1885 1921) ethnicity = Croat death date = death date… …
105Coal seam fire — A coal seam fire near Denniston, New Zealand A coal seam fire or mine fire is the underground smouldering of a coal deposit, often in a coal mine. Such fires have economic, social and ecological impacts. They are often started by lightning, grass …
106explosive — explosively, adv. explosiveness, n. /ik sploh siv/, adj. 1. tending or serving to explode: an explosive temper; Nitroglycerin is an explosive substance. 2. pertaining to or of the nature of an explosion: explosive violence. 3. likely to lead to… …
107railroad — /rayl rohd /, n. 1. a permanent road laid with rails, commonly in one or more pairs of continuous lines forming a track or tracks, on which locomotives and cars are run for the transportation of passengers, freight, and mail. 2. an entire system… …
108mineral deposit — Introduction aggregate of a mineral in an unusually high concentration. About half of the known chemical elements (chemical element) possess some metallic (metal) properties. The term metal, however, is reserved for those chemical… …
109Davidson Ditch — This article is about the Alaska project. For the water conduit in Colorado, see Davidson Ditch (Colorado). Davidson Ditch An inverted siphon of Davidson Ditch, seen in 2008. Location Country …
110National Port Authority — of the Republic of Liberia Abbreviation NPA Formation 1921 Type Port district Headquarters Freeport of Monrovia Bushrod Island, Monrovia Region served …
