unit no thick description 12 (contd) 50ft silty at 160 150 ft. units as a whole alternate with lenses of fine sand and silt (small) [2020 ft to this point] 250 ft becoming sandier not to clean vfg ss rippled load cast forms shoulder here. 100 ft here there are some massive 1m thick ss rippled + parallel at least 6 of them defining a 10m band carb material or bedding plane, cl.4 former 50 ft. H. gray vfg arenite