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GSCI 320 - Petrology
Fort Hays State University
Spring 2010

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Lecture #9

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Clerical:

  • Themes of the Day:

    • Limestones & Dolostones

    Limestones & Dolostones

    • Sea-Level Curves
    • Overview of Carbonates
      • Carbonates - (CO3)2- - 10-15% of all sed rocks
      • Acid reaction - CaCO3+2HCl=Ca2++2Cl-+CO2+H2O
      • often quite pure - only minor clays, silica as impurities - Why? Think: depositional environments
    • Textures - more important for classification because of minimal chemical variability
    • Grain Types (allochemical particles)
    • Matrix
    • Grain Size, Sorting, Rounding
    • Insoluble Residues - chert nodules
    • Classification
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    GSCI 320 - Petrology
    Dr. Ron Schott, Assistant Professor of Geology
    Fort Hays State University - Geosciences Dept.
    600 Park Street, Hays, KS  67601-4099
    Phone: (785)628-5348  Fax: (785)628-4096
    E-mail: rschott@fhsu.edu
    Web: http://hays.outcrop.org/schott/
    Page content last revised on: 08 February 2008