66 7/17/57 Big Bend Park. The first collection is from same locality as is the John Wilson Science Department exhibit just by the reaching park HQs 7/17/57/1 103y feet above the upper K contact). 7/17/57/2 along Williams Ck, Tehuacana Quad. N 13', W. 32' Blue regularly Sulfur. [illegible] [illegible] 67 19 Sect. 19 end. 7/19/57 4/8/57 [see p. 56] Wolcamp Kills - Continuation of Section III. 48.) Shales, very silty, grades into a 6" sandy siltstone. Light yellow-brown weathering 3' 49) Conglo., fine sandy matrix, poorly cemented, 1/2" diameter pebbles - a few 2 to 4" bands of greenish gray siltstones. 6' Collection 7/19/57/2 50) Conglo., 3"-4" cobbles at base of a subunit. The subunits grade into a ledge forming (indicated) fine sandstone. 3 or 4 such subunits observed. Top of each subunit is rather planar, Coarsest Conglo. rest right on top of these planar surfaces. 14' 51) Shale and Siltstone, gray to yellow-brown, 5' 52) Sandstone, yellow-gray weathering, in 4" to 10" beds with 2" silt partings. 16'