|The Physical Object|
|Number of Pages||90|
Ninety-five species of Ordovician and Silurian graptolites, including four new species, are described and illustrated. The faunal succession is divided into nine Ordovician and ten Silurian biostratigraphic zones and is correlated with graptolite faunas found elsewhere. Hagemann (, ) discussed Silurian stratigraphy and petrography. Major (, ) described the sedi mentology of the succession around the Ordovician-Sil urian boundary in Hadeland as well as the lowest Silurian in the Mjøsa districts to the north. Owen () revised the stratigraphy of the Upper Ordovician and Lower. Previous Work By , Silurian rocks had been recognized in outcrop in southern Manitoba and in the southern Rocky Mountains; these included strata subsequently designated as Ordovician. In the southern Rocky Mountains, new conodont biostratigraphic data for the Ordovician succession of the Bow Platform is correlated to coeval basinal facies of the White River Trough.
GeologicalQuarterly,,47 (4)– Ordovician–Silurian boundary in the Bardo Syncline, Holy Cross Mountains, Poland — new data on fossil assemblages and sedimentary succession. Middle–Upper Ordovician and Silurian stratigraphy and basin development in southernmost Scandinavia Niels H. Schovsbo, Arne T. Nielsen and Mikael Erlström 50 km Rønne Graben Bornholm Skåne Sweden Germany Kattegat C Terne-1 Norwegian–Danish Basin Ringkøbing–Fyn High Denmark a Sommerodde-1 Pernille-1 A Ordovician-Silurian extinction, global extinction event occurring during the Hirnantian Age ( million to million years ago) of the Ordovician Period and the subsequent Rhuddanian Age ( million to million years ago) of the Silurian Period that eliminated an estimated 85 percent of all Ordovician species. This extinction interval ranks second in severity to the one that. Southern Rocky Mountain Trench in the southwest (Figure 1). Major changes in stratigraphy and structural style occur across the area. Control of lower Paleozoic sedimentary facies by the Kicking Horse Rim, southern Rocky Mountains, Canada: Canadian M.P., and B.S. Norford, , Ordovician and Silurian, in:Sedimentary Cover of the North.
In the southern Rocky Mountains (transect 1, Fig. 1), the fauna of a nearly complete Ordovician platformal succession of the Bow Platform was studied in Jasper National Park, Alberta (Ji and Barnes ; Pyle et al. a). The formations of this section can be traced westward into the basinal equivalents of the White River Trough and. the excursion guide-book of the Field Meeting of the International Subcommission on Silurian Stratigraphy in the Ossa-Morena Zone (Robardet et al., ). The present paper, which includes the most recent data, should be an up to date and comprehensive review of the Ordovician, Silurian and Devonian sedimentary rocks of. the more basinal, Lower–Middle Ordovician succession for source-rock potential. Ferri, F. and Golding, M. (): Evaluation of Ordovician and Silurian stratigraphy for hydrocarbon source-rock potential in the northern Halfway River map area, British Columbia (NTS B/13); in Geoscience Reports , BC Ministry of Energy, Mines and. Schematic restored stratigraphic cross section, main ranges of the Rocky Mountains east to the plains, showing the Cambrian and Ordovician rocks of the Bow River–Kicking Horse transect (modified from Aitken, , his figure 4, used with permission of the Bulletin of Canadian Petroleum Geology).The Kicking Horse rim was the locus of the facies changes in the Middle Cambrian, late Late.