AIN - 50-40 south side of Van Bibber 1) Main clay bed - end of hogback south of Van Bibber Creek. 3 little beds above main bed present. Main bed under out - Stops against fault - beds displaced 10 feet. 081' bentonite at base of main clay. Bottom of ss surface like Verdos 2) Base of first sandstone, fine grained to silty, somewhat platy, gray and brown weathering sandstone with carbonaceous material. Porcelanite present at top of second shale. White weathering, gray when fresh - slightly silty. Second shale 8'-10' thick with prominent 10' ledge of second sandstone below 3) Disconformity - 30-40', third ss above ss above bedded + brown weathering - typical whitish weathering friable little below. Actual disconformity in shaly siltstone between sandstones. partly obscured 4) Very good place to get section of main clay + 3 little beds 5) Lower bentonite of third shale, 6.8' from top of third ss. Third ss holding up