Hole 46 (cont.) 55' 60'10" 5'10" Hard clay as follows :- 6" Black to dark gray hard 'top block' clay with scattered fine modules in lower 3 1/2" 4" Nodule clay, nodules in semihard matrix. 5' Sideritic block clay. Upper 15" modular, with scattered thin modular zones throughout remainder. 60'10" 62'11" 2'1" Sideritic shaley block clay -- ? -- 62'11" 64' 1'1" Black to gray sideritic locally silty hard shale, may be clayey at top. -- ? -- 64' 65'5" 1'5" Gray to light gray siltstone grading downward into gray micaceous silty shale concentration of siderite at about 64'8" -- ? -- 65'5" 65'8" 3" Mottled red and gray greasy micaceous silty shale with large blebs and stringers of siderite.