402-lab9 - Lab 9 GY 402 Sedimentary Petrology (2012)...

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Lab 9 GY 402 Sedimentary Petrology (2012) Carbonate Thin-Sections 2: Non-biogenic and skeletal allochems Oolite grainstones in thin section (field of view for each approximately 2 mm). From Williams, H., Turner, F.J and Gilbert, C.M., 1954. Petrography. W.H. Freeman & Co., 406pp. Introduction : It is now time to start looking at more interesting carbonate rocks. As we discussed in the labs, the carbonates differ from their siliciclastic cousins in being 1) mostly monomineralic (i.e., CaCO 3 and/or CaMg(CO 3 ) 2 ); 2) texturally-distinguished and 3) much more fun. The task you have in store for you this week is to learn to recognize some of the allochems (e.g., carbonate grains) that comprise the carbonate rocks. In this weeks lab, you will meet an eclectic mixture of non-biogenic grains (ooids, intraclasts and peloids) and biogenic (skeletal) allochems. You might see echinoderms, corals, bryozoans, bivalves, gastropods, foraminifera and God only knows what else. Each beastie has its own
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This note was uploaded on 02/05/2012 for the course GLY 402 taught by Professor Staff during the Fall '11 term at S. Alabama.

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402-lab9 - Lab 9 GY 402 Sedimentary Petrology (2012)...

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