SedRocks - Chapter 6 Sedimentary Rocks Sediment any loose...

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Chapter 6 Sedimentary Rocks Sediment – any loose material Rock – an aggregation of minerals and sediment held together in a coherent mass Sedimentary rock – rock formed by lithification at or near the earth’s surface at low pressures and temperatures. May be clastic/detrital, biogenic/biochemical, or chemical. Lithification – process by which unconsolidated sediments are turned into solid sedimentary rock. Diagenesis – collective term for all changes that take place after sediment is deposited and during the process of lithification. Burial Compaction/Dewatering Cementation Detrital or Clastic sedimentary rocks – comprised of clasts of sediment. Clast = particle or “grain” of sediment Clastic rocks classified on basis of particle size, shape, and sometimes composition. Particle shape either rounded or angular. Rounded = no sharp corners. Angular = sharp corners Gravel-sized particles Breccia Conglomerate Sand-sized particles Sandstone Arkose Graywacke Quartz sandstone
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This note was uploaded on 01/17/2012 for the course GEOL 1054 taught by Professor Dr.bethrinard during the Fall '09 term at Tarleton.

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SedRocks - Chapter 6 Sedimentary Rocks Sediment any loose...

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