rock gypsum

rock gypsum
   A sedimentary rock (evaporite) composed primarily of mineral gypsum (CaSO4·2H2O). The rock is generally massive, ranges from coarse crystalline to fine granular, may show disturbed bedding due to hydration expansion of parent anhydrite (anhydrous CaSO4), and may exhibit rhythmic sedimentation (rhymites).
   Compare: gypsite.

Glossary of landform and geologic terms. 2013.

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  • rock gypsum — noun : massive coarsely crystalline to fine grained gypsum …   Useful english dictionary

  • rock anhydrite —    A sedimentary rock (evaporite) composed chiefly of mineral anhydrite (anhydrous CaSO4);    The rock is generally massive, cryptocrystalline, and may exhibit rhythmic sedimentation (rhymites).    Compare: rock gypsum, rock halite.    SW …   Glossary of landform and geologic terms

  • Gypsum, Ohio — Gypsum, referred to by locals as sinkhole or God s Country ,Fact|date=June 2007 is an unincorporated community in eastern Portage Township, Ottawa County, Ohio, United States. Although it is unincorporated, it has a post office, with the ZIP code …   Wikipedia

  • Rock art — is a term in archaeology for any man made markings made on natural stone. They can be divided into:*Petroglyphs carvings into stone surfaces *Pictographs rock and cave paintingsIn addition, petroforms and inukshuks are rock art made by aligning… …   Wikipedia

  • gypsum — [jip′səm] n. [ME < L < Gr gypsos, chalk, gypsum < Sem] a very soft, monoclinic mineral, CaSO4·2H2O, commonly found with other evaporites in sedimentary rock and used to make plaster of Paris and cement; hydrous calcium sulfate: see MOHS… …   English World dictionary

  • gypsum — /jip seuhm/, n. a very common mineral, hydrated calcium sulfate, CaSO4·2H2O, occurring in crystals and in masses, soft enough to be scratched by the fingernail: used to make plaster of Paris, as an ornamental material, as a fertilizer, etc. [1640 …   Universalium

  • Gypsum — Infobox mineral name = Gypsum category = Mineral boxwidth = boxbgcolor = caption = Desert rose, 10 cm long formula = Calcium Sulfate CaSO4·2H2O molweight = color = White to grey, pinkish red habit = Massive, flat. Elongated and generally… …   Wikipedia

  • Gypsum, Colorado — Infobox Settlement official name = Town of Gypsum, Colorado other name = native name = nickname = settlement type = Town motto = imagesize = image caption = flag size = image seal size = image shield = shield size = image blank emblem = blank… …   Wikipedia

  • gypsum —    1. White or colorless mineral or rock composed of the hydrated calcium sulfate, CaSO4●2H2O. Gypsum rock is an evaporite precipitated from sea water and is therefore soluble in water and may contain dissolutional caves. Mineral gypsum is formed …   Lexicon of Cave and Karst Terminology

  • gypsum cave —    Both vadose and phreatic caves can form in gypsum, which is very soluble in water, but they are uncommon because gypsum rock rarely survives total dissolution in the near surface environments associated with explorable caves. Gypsum caves… …   Lexicon of Cave and Karst Terminology