Click here to go to fifth poster. MASSIVE DEFORMATION BANDS ASSOCIATED WITH SINGLE DETACHMENT PLANES Zone of interest All of these well locations and depths correspond to official fault previously interpreted as individual faults. Our 3-D analysis indicates that these fault cut-outs are on a few low angle planes Low angle reverse faults associated with the general folding Stylolite seam Horsetail stylolite seams Note the fairly constant thickness of the deformation band Systematic features -Oil bearing porous sands -Very sharp boundary -Quartz cemented tight sands -Slickenside lower boundary The cored well shows diagenetically altered sandstones regularly spaced. The selected photos show the systematic existence of a slickenside below a tight sandstone with prominent quartz cement. Dissolution features are common and includes stylolites and horsetail stylolites. Ramp and flat slickenside and stylolites Parallel to bedding Step ladder pattern showing a succession of flats and ramps PDVSA