...Halsey W. Miller; Ada Swineford ABSTRACT A paleoecological study was made of a phosphatic nodule zone at the base of the Robbins shale (lower Virgilian, Upper Pennsylvanian) in Douglas County, Kansas. The nodules formed in shallow marine basins or bays which are inferred to have been characterized...

... by two sets of intersecting curved lines; 2) I. cancellatus Bielokrys, 1999 , from the Eocene of Dniepr River (Dnepropetrovsk, Ukraine), displays a cancellate sculpture and coarser ribs; 3) I. asper Bielokrys, 1999 , from the Eocene of Dniepr River (Dnepropetrovsk, Ukraine), shows a fine nodulose...

...; strongly sculptured pleonal somites with one transversal groove interrupted by a short median carina on s2–s5 terga, and strong nodulose process rimmed by one triangular groove at the fold separating tergopleuron from tergum on s2–s5 tergopleura; telson with one pair of broad proximal tubercles; uropods...

.... Until the late 1970s, before the current formal stratigraphic scheme of the Ordovician for the Siberian Platform was ratified, the respective division, correlation, and facies zoning in the basin of the Vilyui River had been based solely on fragmentary natural exposures [ 2 – 8 ]. In the 1980s...

.... , and A. Swineford , 1957 , Paleoecology of nodulose zone at top of Haskell Limestone (Upper Pennsylvanian) in Kansas : AAPG Bulletin , v. 41 , p. 2012 - 2036 . Minor , J. A. , 1969 , Petrology of the Tonganoxie Sandstone : Master’s thesis, Missouri University, Columbia, Missouri, 97 p...

... and seal rocks. The predictive capability of the model was evaluated positively, and the model was employed to detect zones of high channel fill facies probability that form bodies that are isolated or that terminate upward in pinchouts or are truncated by a fault. Our approach can prove helpful...

...), consistently lowly convex valves, fewer (approximately 25) and wider ribs that can be progressively nodulose ventrally, no radial striae, and broader crenulations on the shell interior. Tschudin (2001) reported that although Tucetona has a thin periostracum, it never has radial striae. He also reported...

...), who giv e an excellent summary of the work of earlier authors (op . cit ., p . 3) . The Foraminifera of these strata were first described by McGuga n (1964) : he set up a system of zones ranging from the Santonian to th e Maastrichtian . Langhus (1968), using numerical methods, studied th e...

...., and Raasch, G. O., 1958, "Mega:faunal Zones in the Alberta Mississip- pian and Permian," Amer. Assoc. Petrol. Geol., Al lan Memoria l Volume. pp. 216-231, P1. 1. Photographs of Mississippian corals and brachiopods. Technical. t tarker , P., and Thorsteinsson, R., 1960, "Permian Rocks and Faunas of Grinnell...