402-lab4 - GY 402 Sedimentary Petrology (2012) Mature...

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Lab 4 GY 402 Sedimentary Petrology (2012) Mature Siliciclastic Sedimentary Rock Thin-sections Quartz arenite sandstones 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: Mature siliciclastic sedimentary rocks are those that have been derived from sediment that underwent extensive chemical alteration before or during transportation. These rocks are usually enriched in quartzose grains (quartz, chert etc), but may be cemented by a variety of different minerals. They may also contain some matrix. Lab exercise (do in your note books, not re-doable): The list of thin-sections at the bottom of this page were all collected from mature sandstones and will be available in the lab for the next week or so. All have accompanying hand specimens. I would like you to examine one example from each group. Make sure that you can identify the major grains and any properties identifiable at hand specimen-scale. I would also like you to produce one petrography summary of each of the thin-sections that you examined in your hard covered note book using the basic format attached to the back of this lab (including one or more decent sketches of the thin section). For this lab, only deal with the grains. Leave space below your grains section and an additional blank page after each lab. In 2 weeks
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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-lab4 - GY 402 Sedimentary Petrology (2012) Mature...

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