page 3 
50. Siltstone, clayey, gray with carbonaceous 
flecks. Locally a silty shale. 1.0* 
49. Sandstone, fine- to medium -grained, in 
thin beds up to 1.0 foot thick. Beds mas- 
sive to laminated and cross-laminated, 
some silty layers, many "worm" -worked, 
friable beds. Upper 1. 1 feet laminated, 
white, with ferruginous, brown cap; re- 
mainder buff and brown, basal 1. 5 to 2. 0 
feet Fe -impregnated. Ripple marks, 
"worm" casts, and trails on bedding 
surfaces. 10.6* 
48. Siltstone, shaly, inter -laminated with 
silty shale; scattered layers siltstone 
in upper 1.4 feet. Weathers to crumbly, 
gray- white face, commonly with crude 
vertical columnar structure. 5.7 1 
47. Sandstone, fine-grained, irregularly 
thin-bedded, to laminated, some inter - 
bedded shale, chiefly in lower part. 
"Worm" casts and trails on bedding 
planes, 2. 1« 
46. Sandstone, fine-grained, massive to 
vaguely laminated, weathers yellow 
gray. Thins out locally. 1.3* 
45. Sandstone, fine-grained, locally inter- 
laminated with dark gray, sandy shade, 
carbonaceous flecks. 0.9* 
