|Series||Bulletin / Geological Survey of Canada ;, 358, Bulletin (Geological Survey of Canada) ;, 358.|
|LC Classifications||QE185 .A43 no. 358, QE807.A5 .A43 no. 358|
|The Physical Object|
|Pagination||155 p. :|
|Number of Pages||155|
|LC Control Number||87210419|
The lower Callovian succession observable in cliffs of Anabar Bay and Bolshoi Begichev Island is described with consideration of zonal subdivisions and beds with ammonites. The unified summary biozonation suggested for North Siberia includes the Cadoceras elatmae Zone with C. frearsi and C. elatmae (instead former C. anabarense) subzones, subsequent C. tschernyschewi and C. Cited by: 5. dard zonal succession of the Bathonian and Callovian. The interpretation of the boreal Bathonian proposed by John Callomon was different from that used by Soviet and Russian authors as it included a part of the boreal Callovian. Time showed that John Callomon was right, and his interpretation is accepted in the modern standard zonal scale of. changed the notion of the Bathonian and Callovian zonal stratigraphy of central Siberia. As is known, the Siberian upper Bathonian zonal scale is based on a succession of the Cadoceratinae gen-era and species. The lack of West European taxa pre-vents a direct correlation of the Siberian zonation with the West European standard. Correlation with. Zonation and Correlation of Middle Boreal Bathonian to Lower Callovian (Jurassic) Ammonites, Salmon Cache Canyon, Porcupine River, Northern Yukon Article Jan
Analysis of the distribution of ostracods from the Armkhi Formation (Callovian) of the Tsudakhar section (Central Dagestan) enabled the identification of a stratigraphic sequence of six assemblages determined by paleoecological conditions and the first ostracod-based biostratigraphic zonation of the Callovian of Dagestan. Beds with Pleurocythere khapissovi and the Neurocythere cruciata. as uppermost Bathonian. Position of the top of Lower Callovian also cannot recognize precisely, because faunal list from the Lower-Middle Callovian transition beds included the Lower, Middle and Upper Callovian ammonite species (especially Hecticoceratins). This review based on the recent studies in the vicinity of Sudak town (fig.1). Subzone), is middle Callovian to early Oxfordian. The Vagalapilla stradneri Zone is middle Oxfordian to Kimmer-idgian. The Conusphaera mexicana Zone, subdivided into a lower Hexapodorhabdus cuvillieri Subzone and a Polycos-tella beckmannii Subzone, is the latest Kimmeridgian to Tithonian. Direct correlation of this zonation with the boreal. Gulyaev D.B. () The evolution of ammonite genus Paracadoceras and infra-zonal correlation of near-boundary Bathonian-Callovian deposits of Boreal regions // Paleontology, Stratigraphy and Paleogeography of the Mesozoic and Cenozoic of Boreal Regions. Vol.
The Lower and Middle Callovian is characterized by Neurocythere cruciata cruciata (Triebel, ) and N. cruc. franconica (Triebel, ). Franz et al. published the Bathonian and Lower Callovian ostracod fauna of the Röttingen section. There, the Bathonian ostracod fauna was very poor; this is why the index species for the Bathonian could not. Finds of Cadoceras calyx in the upper Bathonian scale permitted, for the first time, the recognition of a corresponding zone. The Bathonian-Callovian boundary is placed between the calyx and anabarense zones. The upper Bathonian zonal scale of northern East Siberia is now in total agreement with the East Greenland zonal scale. France-correlation of the lower Callovian-middle Oxfordian using sequence stratigraphy Dinoflagellate cyst biozonation correlated with boreal ammonite zonation. (a) Lower Jurassic. ,00 AGE Upper CALLOVIAN Middle CALLOVIAN Lower CALLOVIAN Lower BATHONIAN Upper BAJOCIAN Lower BAJOCIAN. BOREAL STANDARD AND PANBOREAL CORRELATION The need for a boreal zonal standard arises from the fact that the boreal type sections cannot be correlated Upper Bathonian and Callovian, Northeastern Greenland [40, 81, 82]. 13 - ArcticCanada Bathonian Stage, Lower and Middle Bathonian - Porcupine and Northern Yukon Rivers .