"Keough quarry continued. Baked clay then reddish li and shale 2 ft. Fissled earthy li, as above 10 ft. Productive zone on th middle. Zone (3). Thickness 10 ft. Cluster or Pit Kim of Schneider, 20 to 60 ft thick. Archimedes li with pockets flooded hole at tip. Thick zone 4ft. Mr Crg says this is Traps formation. Fronts zone (4) Fagetville felsar, not seen, 6 to 100 ft. Traps li mid shale, 15-30 ft. Bore at iron level. Not seen. About 200' (Schneider) This gives a thickness in the Manor of about 114 ft. In actual thickness on Gregory's measured section. Schneider gave it as 120 ft Bridge over Grand River, at Rex, about 8 to 10 miles north of Muskegon. Pennsylvanian. Top. Baked shale to grit at top of iron bluff. 3 ft. Then reddish gandy li with fossil shells. Was almost no fossils. Thickness 2ft. Black shale 12 to 15 ft. Then reddish crinoidal li, three thin li, separately by Haer Shale than li. specific zone Li on top. Eliminate modulated belts } thickness one foot.