a black or dark-brown shale or siltstone rich in bitumens, from which shale oil is obtained by destructive distillation.
a fine-grained shale containing oil, which can be extracted by heating
A fine-grained black or dark brown shale containing hydrocarbons in the form of kerogen. When heated, oil shale yields petroleum or natural gas.
noun 1. a smooth area on the surface of water caused by the presence of oil. noun 1. a mass of floating oil covering an area of water, esp oil that has leaked or been discharged from a ship
[oil-skin] /ˈɔɪlˌskɪn/ noun 1. a cotton fabric made waterproof by treatment with and used for rain gear and fishermen’s clothing. 2. a piece of this. 3. Often, oilskins. a garment made of this, especially a long, full-cut raincoat or a loose-fitting suit of pants and jacket as worn by sailors for protection against rain. /ˈɔɪlˌskɪn/ […]
noun 1. an accidental release of oil into a body of water, as from a tanker, offshore drilling rig, or underwater pipeline, often presenting a hazard to marine life and the environment.
[oil-spot] /ˈɔɪlˌspɒt/ noun 1. a brown or black ceramic glaze dotted with silvery caused by impurities.