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• TABLE G7 <br />STATIGRAPHIC COLUMN FOR DOWE FLATS <br />Formation Avera~ Thiclmess (ft) <br />QUATERNARY VALLEY FILL DEPOSTfS 0-50 <br />PIERRE FORMATION 8,000 <br />NIOBRARA FORMATION <br />SMOKEY HILL MEMBER <br />FOURTH RIDGE 12-40 <br />3-4 INTER-RIDGE 55 <br />THIRD RIDGE 30-34 <br />2-3 Inter Ridge 100 <br />SECOND RIDGE 10 <br />1-2 Inter-Ridge 100 <br />FT. HAYS MEMBER <br />FIRST RIDGE (Hi-Cal) IS <br />• BENTON FORMATION <br />CODELLSANDSTONE 24 <br />CARLILE SHALE 26 <br />GREENHORN LIMESTONE 220 <br />GRANEROS SHALE 165 <br />MOWRY SILTSTONE 22 <br />DAKOTA GROUP <br />UPPER MUDDY SANDSTONE 46 <br />LOWER MUDDY SANDSTONE 94 <br />SKULL CREEK SHALE 95 <br />PLAINVIEW FORMATION 80 <br />LYTLE SANDSTONE 49 <br />• <br />