841 becomes darker & more PLASTIC CLAY upward in becoming a plastic clay about 4' above base (some silt) [proninent greenish & reddish stained soil] thoroughly mixed hollow smeared or watery looking soil horizon looks like A soil CONTACT extremely gradat. in UNIT 5 but level. UNIT thing [?] to about 1/2 this thickness 100' W & 30' E /7.5 UNIT 5 transition to 6 c[lay] st. reddish & greenish grey mottled, w/ extensive slicks. strongly red near base becoming greayer upward /7 1/4 UNIT 6 Here the gr-grewnish grey component becomes predominant A siltst. basal coat