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===Lithofacies===
 
===Lithofacies===
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One of the first steps in the facies analysis of a clastic reservoir is the description and interpretation of available conventional core.<ref name=pt06r119>Siemers, C. T., Tillman, R. W., 1981, Recommendations for the proper handling of cores and sedimentological analysis of core sequences, in Siemers, C. T., R. W. Tillman, C. R. Williamson, eds., Deep-Water Clastic Sediments—A Core Workshop: SEPM Core Workshop, n. 2, p. 20–44.</ref> An important result of [[core description]] is the subdivision of cores into ''lithofacies'', defined as subdivisions of a sedimentary sequence based on lithology, grain size, physical and biogenic sedimentary structures, and stratification that bear a direct relationship to the depositional processes that produced them. Lithofacies and lithofacies associations (groups of related lithofacies) are the basic units for the interpretation of depositional environments.
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One of the first steps in the facies analysis of a clastic reservoir is the description and interpretation of available conventional core.<ref name=pt06r119>Siemers, C. T., and R. W. Tillman, 1981, Recommendations for the proper handling of cores and sedimentological analysis of core sequences, in C. T. Siemers, R. W. Tillman, and C. R. Williamson, eds., Deep-Water Clastic Sediments—A Core Workshop: SEPM Core Workshop, n. 2, p. 20–44.</ref> An important result of [[core description]] is the subdivision of cores into ''lithofacies'', defined as subdivisions of a sedimentary sequence based on lithology, grain size, physical and biogenic sedimentary structures, and stratification that bear a direct relationship to the depositional processes that produced them. Lithofacies and lithofacies associations (groups of related lithofacies) are the basic units for the interpretation of depositional environments.
    
===Depositional environments===
 
===Depositional environments===

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