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Formation Member Thickness Debth to Bottom <br />(ft) (ft) <br />Physical Character <br />NIOBRARA <br />FORMATION <br />(Upper Cretaceous) <br />10' <br />10 <br />UNCON <br />40 <br />50 <br />Hard blocky white to light -gray limestone beds 1/2 to 3 ft <br />thick alternating with thin beds of gray shale. <br />IM T <br />CARLI LE <br />SHALE <br />(Upper Cretaceous) <br />CODELL SIANCiS70NE;._ .., <br />6 <br />56 <br />Hard brown sandy petroliferous limestone. <br />75 <br />131 <br />Bluish -gray to black fissle marine shale; contains <br />large calcareous concentrations in upper part. <br />75 <br />206 <br />Tan to blue -black chalk calcareous shale; contains <br />thin beds of limestone in lower part. <br />GREENHORN <br />LIMESTONE <br />(Upper Cretaceous) <br />50 <br />256 <br />Interbedded black calcareous shale and light -gray <br />fossiliferous limestone. <br />20 <br />276 <br />Dar►- ra shale; contains thin beds of bentonite. <br />40 <br />316 <br />Gray thin - bedded petroliferous limestone and <br />calcareous shale. <br />G RAN E ROS <br />SHALE <br />(Upper Cretaceous) <br />140 <br />456 <br />Dark -gray to black fisslile gypsiferous shale; contains <br />zone of calcareous concentrations about 40 ft below <br />top. Alternating beds of shale and sandstone at <br />base. <br />DAKOTA <br />SANDSTONE <br />(Lower Cretaceous) <br />UPPER SANDSTONE <br />100 <br />556 <br />Tan to bright gray, fine -to medium - grained massive sandstone. <br />May be coglomeratic and moderately cemented, but may <br />be soft and contain thin shale beds. <br />DRY CREEK CANYON <br />Dark -gray to black sandy shale, this unit may not be <br />present. <br />LOWER SANDSTONE <br />Medium- rained sandstone. <br />Source: USGS Water Supply Paper 1799 (Weist, 1965) <br />mokle <br />e� <br />rr <br />■ <br />Permit a p� Confidenti1l ?_4/_ <br />Class P`Y Type Seq <br />MV# Inspection Date <br />Doc Date (if no date stamp) ,G �— <br />Exh C � <br />Doc Name SPC'f Ic)t/ <br />From DBMS /Other <br />To DRMS /Other <br />RIO GRANDE PORTLAND CEMENT COMPANY <br />RED ROCK PLANT & LIMESTONE MINE <br />Pueblo County, Colorado <br />EXHIBIT C -7 <br />GENERALIZED GEOLOGIC SECTION <br />Revised to include Depth to Bottom PBE 06.28.02 - <br />1180 E.HN C -7.DWG <br />BY: PBE PREPARED BY: MK I DATE:06.28.02 — <br />