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<br />1 <br />2.04.6(2)(a) <br />' The development of coal on a relatively flat coastal plain <br />' requires that an essentially equilibrium situation exist <br />beto+een sediment supply from a landward source and adjacent <br />' basin subsidence. For any appreciable lateral accumulation <br />of coal, it is necessary for the strandline to prograde <br />slowly so that the swamp area is constantly being enlarged <br />' and kept above sea level. This means that conditions for <br />maximum deposition of coal require that sediment supply be <br />' Slightly greater than basin subsidence. A destruction of <br />this near equilibrium condition could result either from an <br />' increased landward sediment supply causing alluviation of <br />the coal swamps, or from a transgression of marine environments. <br />A thorough understanding of depositional environments and their <br />relationship to coal formation is an excellent tool for use in <br />' exploration for correlation of coal seams. It is possible that <br />such an understanding could be useful in minimizing the number <br />of holes which must be drilled on a prospect in order to evaluate <br />it. <br />' For convenience, the stratigraphic section has been subdivided <br />t into 6 cycles: the Rollins-t4ancos, the coal-bearing strata of <br />the bower Coal Member, the massive sandstone at the top of_ the <br />Lower Coal Member, strata of the Upper .Coal Member, the Aarren <br />' Member and the igneous intrusives. The following depositional <br />model of the sediments has been made using observations of rock <br />t types, and characteristics of coal seams. <br />' The N.ancos Shale in the area represents the offshore facies of <br />the last major transgression in the Upper Cretaceous. These <br />t <br />35 <br />