By Walter E. and Michael A. Arthur (Eds) Dean
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Extra info for Stratigraphy and paleoenvironments of the Cretaceous Western Interior Seaway, USA (Concepts in Sedimentology & Paleontology 6)
5 My in duration. It is represented by the two shale-sandstone in- ft by the tops of Afropollis jardinus, Apteodinium grande, Ginginodinium evitti, Luxadinium primulum, Luxadinium pmpatuium , Muderongia asymmetrica, Neoraistrickia robusta, Ovoidinium verrucosum, Pilosisporites trichopappilosus, Pseudocertium expolitum, and Stellatopollis barghoornii. This interval includes the uppermost Dakota and lowermost Graneros Formations (Fig. 2). The Middle Cenomanian is characterized by the base of Isabelidinium magnum at 1000 fi, and the top of Kiokansium perprolatum at 1050 ft, which spans the contact of the Graneros 32 ROBERT W.
Rai, and S. Walker. The core and log data were released for publication by Amoco. Numerous Amoco staff supported this project by core and sample preparation and by drafting, photography, and word processing. Amoco management recognized the technical value of the Cretaceous study. REFERENCES BERGEN, J. , EVETTS, M. , FRANKS, P. , M. , SCOTT, R. , AND STEINI, J. A.. 1990, Mid-Cretaceous sequences and cyclostratigraphy, Western Kans. ): Society of Economic Paleontologists and Mineralogists Research Conference on Cretaceous Resources, Events, and Rhythms, August 20-24, 1990, Denver, Colorado, Program Abstracts.
EVETTS, JAMES A. BERGEN, AND JEFFRY A. -KEY FOSSIL RANGES IN CORE DEPTHS BASE TOP TAXA Ammonites Adkinsites bravoensis Collignoniceras woollgari Prionocyclus hyatti Bivalves Inoceramus arvanus Inoceramus comancheanus Inoceramus cuvieri Inoceramus pictus Inoceramus prefragilis Inoceramus rutherfordi Mytiloides costellatus? Mytiloides hercynicus? Mytiloides labiatus Mytiloides mytiloides Mytiloides opalensis Mytiloides subhercynicus Ostrea beloiti Platyceramus platinus Pseudoperna bentonensis Pseudoperna congesta Planktonic Foraminifera Archaeoglobigerina cretacea Clavihedbergella moremani C.
Stratigraphy and paleoenvironments of the Cretaceous Western Interior Seaway, USA (Concepts in Sedimentology & Paleontology 6) by Walter E. and Michael A. Arthur (Eds) Dean