Using the carbonate teaching collection of the Department of Geology at the University of South Carolina
Rolando Benitez aided creating web based exercises working with the thin section photomicrographs
Later using this earlier version as a template, Nassir Alnajii and Christopher Kendall built this more extensive carbonate petrology section. Here, as in the version that Dhakilallah Al-Adwani produced, the text of the outlined exercises was written by Christopher Kendall and is based on the text of the carbonate petrography exercises that were developed by Robert Folk of the University of Texas at Austin. Use the pull down menus accessed above to gain access to the exercises.
The photomicrographs cover a broad spectrum of typical carbonate rocks, including those essentially unmodified by alteration. Some photomicrographs are of chemical rocks of various compositions that are often found with carbonates.
Instructions to those learning from these images of carbonate Thin Sections.
carbonate petrography can be initially learned with no access to carbonate thin sections but using the photomicrographs and the accompanying text to be found in the carbonate thin section portion of this site. Students will have a better understanding of how to describe carbonate thin sections. Using these photomicrographs, where it is reasonable to do so, they should try list the complete rock name of the carbonate involved. They should apply either:
- Folk's classification, including such modifiers as may be necessary for description (e.g., sandy Milliolid biomicrite, packed poorly washed mixed biomicrite, etc.; for summary see Folk 1959, and 1962, for completer discussion.
- or Dunham's classification, including such modifiers as may be necessary for description (Milliolid packstone, etc; for summary see Dunham 1962, for completer discussion.
Dunham, R. J., 1962, Classification of carbonate rocks according to depositional texture. In: Ham, W. E. (ed.), Classification of carbonate rocks: American Association of Petroleum Geologists Memoir, p. 108-121.
Folk, R.L., 1959, Practical petrographic classification of limestones: American Association of Petroleum Geologists Bulletin, v. 43, p. 1-38.
Folk, R.L., 1962, Spectral subdivision of limestone types, in Ham, W.E., ed., Classification of carbonate Rocks-A Symposium: American Association of Petroleum Geologists Memoir 1, p. 62-84.