6/29/84 loc. 8427 E side STINKUI Valley Mbr III Beds. Ledges of ripple marred DOWN colored 15. ? IT, gray carb 55. below ledge it lowest coal. Dip 90 NW Se ledge abt 100' below COAL. [Too much footage in estimate] loc 8428 SE site bank STINKUI River 8427b muddy PALEOZOIC ORTHOGYRITE FAULT follows River Corgse material on W side although mantled by marginal material shows oxid color and carb x lyptrfic aspect in s it des ZmtT is common to E-S. Fm. Mbr IV