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0 At the Bowie No. 2 Mine, both normal and strike-slip faults have been encountered but <br />no known faults are expected at the Terror Creek crossing. The southern portion of the <br />D6 panel is traversed by a N 80-90° E left-lateral, strike-slip fault system. The system is a <br />complex array of anastamosing fault planes of variable offsets. Relative motion is 10° to <br />15° from the horizontal with 5-10 feet of total throw down to the south. North of the <br />strike-slip fault, the D6-D9 panels are intersected by some N 60° E normal faults with <br />little to no offsets. It appears that these faults formed as a result of differential movement <br />along the strike-slip fault. This assertion is based on observations showing that throw <br />decreases with increasing distance from the fault to the north, but no such features are <br />found to the south. Where present, kinematic indicators suggest dip-slip movement and <br />little-to-no shear (Hunt 2004). <br />Figure 3 presents an east-west geologic cross section near the corridor. This cross section <br />faces northward up-stream from Terror Creek. The major units present are representative <br />of the Cretaceous Age Lower Mesa Verde Formation in this area and include the Rollins <br />• Sandstone, the C-Sandstone (locally referred to as Bowie Sandstone or Upper Marine <br />Sandstone), the Coal seams A through D-Upper. Horizontally bedded mudstone and <br />siltstone sequences together with the cross-bedded to laminar bedded fluvial sandstone <br />channels are also present. The alluvial valley fill is believed to be Quaternary in age and <br />is composed of Tertiary age igneous boulders, cobbles and gravel. Non-typical aspects of <br />bedrock units in this section are all related to the East to West transition from marine- <br />dodninate deposition toward fluvial-dominated deposition in the interval Rollins <br />Sandstone up through the C-Sandstone. <br />One noticeable effect of this transition is the thinning of the lower C-Sandstone member, <br />which pinches out completely approximately one mile west of Terror Creek. A second <br />feature related to the transition is the bottomward thinning of the B-Upper Seam in drill <br />hole TC-03-02. This is believed to be the result of near proximity to a feeder channel that <br />distributed the interbeded material between the two B-Seams. That is, this feeder may <br />have represented a local ridge in the pre-B-Upper swamp that prevented accumulation of <br />0 peat until the adjacent area filled and grew high enough to crest the ridge (Hunt 2004). <br />Maleki Technologies, Inc. Page 10