Rock_Groups

Rock_Groups - A finished thin section. Fig. A.6a,b 2009...

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© 2009 W.W. Norton Rock Groups Some Rocks are Older Than Others
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© 2009 W.W. Norton Fig. A.CO Important for Classification of any rock: 1. 1. Texture Texture : --Small Scale, i.e., hand specimen or thin section a. Grain Size b. Grain Shape c. Arrangement/ Alignment of Grains --Large Scale, i.e., outcrop Layering, bedding, foliation 2. 2. Composition Composition a. Mineral Content b. Chemical Compounds (e.g., oxides) c. Chemical Elements
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© 2009 W.W. Norton Clastic vs. crystalline rock textures — 1. Clastic texture in sandstone, a sedimentary rock. Microscopic view “Exploded” view Hand sample Fig. A.1a
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© 2009 W.W. Norton Clastic vs. crystalline rock textures — 2. Crystalline texture in granite, an igneous rock. Microscopic view “Exploded” view Hand sample Fig. A.1b
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© 2009 W.W. Norton Describing grains in rock. Fig. A.4 Fine Coarse Equant Inequant Aligned inequant grains align with foliation Grain size comparison chart. Grain shape.
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© 2009 W.W. Norton Preparing a thin section. A rock saw. A rock “chip” on a slide.
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Unformatted text preview: A finished thin section. Fig. A.6a,b 2009 W.W. Norton A petrographic microscope. A photomicrograph Fig. A.6c,d 2009 W.W. Norton Cliffs in the Rocky Mountains, Colorado. Note the sedimentary layering = bedding. Fig. A.2a 2009 W.W. Norton Road cuts are great to see the layering in rocks (Appalachians, New York) Fig. A.2b 2009 W.W. Norton Streams are helpful, too! (Arizona) Fig. A.2c 2009 W.W. Norton Cross bedding in sedimentary rock (Washington) Fig. A.5a Bedding Tilted bedding 2009 W.W. Norton Sedimentary rock, closer to home (California) Fig. A.3b 2009 W.W. Norton Up close and personal with an Igneous rock (Hawaii) Fig. A.3a 2009 W.W. Norton Foliated metamorphic rock (Switzerland) Fig. A.3c 2009 W.W. Norton Foliation in metamorphic rock. Fig. A.5b Foliation 2009 W.W. Norton A marble quarry in Italy. Fig. A.AV 2009 W.W. Norton An electron microprobe (UCSBs) Fig. A.7...
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This note was uploaded on 02/25/2012 for the course EARTH 2 taught by Professor Thomas during the Summer '11 term at UCSB.

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Rock_Groups - A finished thin section. Fig. A.6a,b 2009...

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