bitumens
81asphalt rock — Geol. a rock formation, usually of limestone or sandstone, containing large amounts of bitumens. * * * …
82fossil fuel — Energy. any combustible organic material, as oil, coal, or natural gas, derived from the remains of former life. * * * Any of a class of materials of biologic origin occurring within the Earth s crust that can be used as a source of energy.… …
83oil shale — Geol. a black or dark brown shale or siltstone rich in bitumens, from which shale oil is obtained by destructive distillation. [1870 75] * * * Any fine grained sedimentary rock that contains solid organic matter (kerogen) and yields significant… …
84petroleum — petroleous, adj. /peuh troh lee euhm/, n. an oily, thick, flammable, usually dark colored liquid that is a form of bitumen or a mixture of various hydrocarbons, occurring naturally in various parts of the world and commonly obtained by drilling:… …
85pitch — pitch1 pitchable, adj. /pich/, v.t. 1. to erect or set up (a tent, camp, or the like). 2. to put, set, or plant in a fixed or definite place or position. 3. to throw, fling, hurl, or toss. 4. Baseball. a. to deliver or serve (the ball) to the… …
86lacquerwork — Any of a variety of decorative objects or surfaces, usually of wood, to which a coloured, highly polished, and opaque type of varnish called lacquer has been applied. True lacquerwork is Chinese or Japanese in origin. The technique was copied in… …
87black varnish — ▪ varnish also called Japan, any of a class of oil varnishes in which bitumen (a mixture of asphaltlike hydrocarbons) replaces the natural gums or resins used as hardeners in clear varnish. Black varnish is widely used as a protective… …
88hydrocarbon — A compound containing only hydrogen and carbon. Diels h. a phenanthrene derivative obtained by the dehydrogenation of various steroids. saturated h. a h. that contains the greatest possible number of hydrogen atoms, so that the …
89Portlandit — Chemische Formel Ca(OH)2 Mineralklasse Oxide und Hydroxide 4.FE.05 (8. Auflage: IV/F.03 100) (nach Strunz) 06.02.01.04 (nach Dana) Kristallsystem trigonal Kristallklasse ditrigonal skalenoedrisch …
90William Otis Crosby — (* 14. Januar 1850 in Decatur, Byrd Township (Ohio); † 1925) war ein US amerikanischer Geologe. [1] Er studierte am Massachusetts Institute of Technology, graduierte 1876 und war zunächst Assisten. Ab 1880 war er Instruktor 1883 wurde er a.o.… …
