adverb see petrography

New Collegiate Dictionary. 2001.

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  • petrographically — See petrographer. * * * …   Universalium

  • petrographically — pet·ro·graph·i·cal·ly …   English syllables

  • petrographically — adverb see petrographic * * * petrographˈically adverb • • • Main Entry: ↑petro …   Useful english dictionary

  • petrography — noun Etymology: New Latin petrographia, from petr + Latin graphia graphy Date: 1651 the description and systematic classification of rocks • petrographer noun • petrographic or petrographical adjective • petrographically adverb …   New Collegiate Dictionary

  • Tufa — Not to be confused with tuff, a porous volcanic rock. This article is about the geological formation. For the historic Chinese name, see Southern Liang. Tufa columns at Mono Lake, California Tufa is a variety of limestone, formed by the… …   Wikipedia

  • Leucite — is a rock forming mineral composed of potassium and aluminium tectosilicate K [AlSi2O6] . Crystals have the form of cubic icositetrahedra but, as first observed by Sir David Brewster in 1821, they are not optically isotropic, and are therefore… …   Wikipedia

  • Enstatite — Infobox mineral name = Enstatite category = Silicate mineral boxwidth = boxbgcolor = imagesize = caption = formula = Mg2Si2O6 molweight = color = White, grey, green, yellow or brown colorless in thin section. habit = Lamellar, fibrous, or massive …   Wikipedia

  • Hedenbergite — Hedenbergite, CaFeSi206, is the iron rich end member of the pyroxene group having a monoclinic crystal system. The mineral is extremely rarely found as a pure substance, and usually has to be synthesized in a lab. It was named in 1819 after M.A.… …   Wikipedia

  • Chuckanut Formation — Stratigraphic range: Early to Late Eocene …   Wikipedia

  • Um Adawi Granites — The Um Adawi Granites are granitic igneous rock formations found in the southeastern Sinai Peninsula.Um Adawi granitic rocks have field relations, petrographic and chemical characteristics similar to the older granites of the Eastern Desert and… …   Wikipedia

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