Access to fulltext denied by publisher Please contact your local library to acquire this article: "Biostratigraphic evaluation of a sequence bounding surface: The Cardinal/Leyland unconformity ("E5/T5 surface") in the Cardium Formation (Upper Cretaceous; upper Turonian - lower Coniacian) at Seebe, Alberta" By: Krause, F., Hall, R.L., Joiner, S.D. and Deutsch, K.B. Publisher: Canadian Society of Petroleum Geologists Bulletin of Canadian Petroleum Geology Vol. 42: 296-311, 1994.