Sent from Mail for Windows 10 Has there been a revision to or a standardized list of the Molluscan biostratigraphy (Ammonite and Inocermid zones) for North America for the KWIS? The reference I use is 27 years old and looking for something a bit more current Reference:ÂÂÂ KAUFFMAN, E. G., SAGEMAN, B. B., KIRKLAND, J. I., ELDER, W. P., HARRIES, P. J., and VILLAMIL, T., 1993. Molluscan biostratigraphy of the Cretaceous Western Interior Basin, North America. In: Caldwell, W. G. E., and Kauffman, E. G., Eds., Evolution of the western interior basin, 397â434. St Johns: Geological Association of Canada, Special Paper 39. Also looking for a compilation of Bentonite marker beds (with current dating) also in North America for the KWIS. Thank in advance John Schneiderman |