7-25-1 July 25, 1963 White Butte 0 very dark grey silty clay micaceous [British Bk 5YR 2/1] 0.4 this layer of Jepsen's Jenkins. Wh color 10YR 7/4 to 10YR 5/4 > Fresh [10YR 3/2] 0.7 humitic zone Covered. may be of extremely limited lateral extent N1-N2 1.5 grey plastic clay with carbon tabs frags fossil leaf [5YR 6/1] some Fe stained [10XR 6/6 4 Purple grey weathering carbaceous shale dark grey. shale very crissc inch of humitic at top. Mono + leaf frags. <2 N1 S YR 4/1 4.7 dark grey somewhat platy leaf bearing clay [N-4] ( dark grey micaceous silty clay no leaves. [N] laterally unit becomes light grey silty clay with leaves