Alum shale
Alum schist Al"um schist", Alum shale Al"um shale", (Min.) A variety of shale or clay slate, containing iron pyrites, the decomposition of which leads to the formation of alum, which often effloresces on the rock. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • alum shale — noun or alum slate also alum schist : a shale or clay slate originally containing pyrite and after weathering containing aluminum sulfate formed by the action of sulfuric acid from the decomposition of the pyrite on the aluminous materials of the …   Useful english dictionary

  • alum-shale — alˈum shale or alˈum slate noun A slate consisting mainly of clay, iron pyrites and coaly matter, from which alum is obtained • • • Main Entry: ↑alum …   Useful english dictionary

  • Alum schist — Al um schist , Alum shale Al um shale , (Min.) A variety of shale or clay slate, containing iron pyrites, the decomposition of which leads to the formation of alum, which often effloresces on the rock. [1913 Webster] …   The Collaborative International Dictionary of English

  • alum schist — noun see alum shale …   Useful english dictionary

  • alum slate — noun see alum shale …   Useful english dictionary

  • Alum — This article is about the chemical compound. For other uses, see Alum (disambiguation). Bulk alum Alum (  / …   Wikipedia

  • Alum Creek Lake — Infobox lake lake name = Alum Creek Lake image lake = USACE Alum Creek Dam and Lake.jpg caption lake = Alum Creek Dam and Lake. View is to the northwest. image bathymetry = caption bathymetry = location = Ohio coords =… …   Wikipedia

  • alum-slate — alˈum shale or alˈum slate noun A slate consisting mainly of clay, iron pyrites and coaly matter, from which alum is obtained • • • Main Entry: ↑alum …   Useful english dictionary

  • Oil shale — For the scientific technical journal, see Oil Shale (journal). Not to be confused with Shale oil or Tight oil. Oil shale Sedimentary Rock Combustion of oil shale Composition …   Wikipedia

  • History of the oil shale industry — Cite paper last =Dyni | first =John R. title =Geology and resources of some world oil shale deposits. Scientific Investigations Report 2005–5294 publisher = U.S. Department of the Interior. U.S. Geological Survey year = 2006 url =… …   Wikipedia

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