Sand, gray, soft, dirty log zone at top. Halymentites major P U PIERRE FOX HILL OMIT Sand, yellow buff, streaks dark gray to dark brownish-gray slate Sand, yellow buff, laminated Shale, dark gray Sand, gray to greenish gray Soft dirty Yellow sulphur zone PIN BUTTE MEMBER ? Shale, dirty-gray, friable Sand nodules Sh. medium-gray, sandy Shale, dark gray Shale, medium gray, streaks sand Shale, medium gray, hard, blocky Shale, dark gray, Micaceous Virgin Creek Albany MEMBER ? Shale, dark gray, sticky Brad's composite of shelf facies of F.H. Top of Colgate SS not valid on lithologic grounds, only basis for it is Halymentite. Base of F.H. drawn at highest yellow sulphur zone This does not hold. Obviously hazy on Pierre members. Composite Section - Pure F.H. + Lance shelf facies From Brookish.