Late triassic - jurassic dinoflagellate biostratigraphy, Western Arctic Canada

• Main Author: Tan, J. T.
• Other Authors: Hills, Leonard V.
• Format: Doctoral or Postdoctoral Thesis
• Language: English
• Published: University of Calgary 1979
• Subjects: QE 731 T34 1979 Microfiche; Paleontology - Mesozoic; Paleontology; Stratigraphic; Geology; Stratigraphic - Mesozoic; Dinoflagellata; Arctic; Canada; Ela; Mould Bay; Deer Bay; Schei Point; Savik
• Online Access: http://hdl.handle.net/1880/15132; https://doi.org/10.11575/PRISM/23346

Bibliography: p. 214-231. Upper Triassic-Jurassic sedimentary rocks, consisting dominantly of interbedded sands, sandstones and shales, are exposed on Borden, Brock, Mackenzie King, Melville, and Prince Patrick islands. In ascending order, they are the Schei Point, Borden Island, Savik, Wilkie Point, Ringnes, Deer Bay, and Mould Bay formations. A total of eight surface sections and over 300 palynological samples form the basis of this study. The dinoflagellates recovered are assignable to 31 genera and 69 species, of which 12 species and 1 subspecies are described as new. They are classified under Apical, Intercalary Precingular, Combination, and Unknown archeopyle groups. Eleven species of acritarchs are described. Twelve dinoflagellate assemblage zones are established, using macrofossils as biostratigraphic control . These zones , designated with corresponding letter zones are: 1) Rhaetogonyaulax arctica - Sverdrupiella usitata assemblage, TA Zone, Late Karnian; 2) He i bergella aculeata - Sverdrupiella septentrionalis assemblage, TB Zone, Norian; 3) TC Zone, Rhaetian - No data available; 4) Lithodinia canadensis - Sentusidiniwn psilatwn assemblage. JA Zone, Hettangian? - Late Sinemurian; 5) Ctenidodiniwn arcticum - Nannoceratopsis gracilis senex assemblage, JB Zone, Pliensbachian (?) - Late Toarcian; 6) Leptodinium arcylatum - Nanno ceratopsis gracilis gracilis assemblage, JC Zone, Bajocian; 7) Ctenidodiniwn orrrza,twn - Valensiella ampulla assemblage, JD-1 Zone, Early Bathonian; 8) Energlynia acollaris - Pareodinia evittii assemblage, JD-2 Zone, Late Bathonian; 9) Paragonyaulacysta calloviense - Pareodinia granulata assemblage, JE Zone, Callovian; 10) Gonyaulacysta jurassica jurassica - Hystrichogonyaulax cladophora assemblage, JF-1 Zone, Early Oxfordian; 11) Gonyaulacysta dualis - Horologinella spinosigibber osa assemblage, JF-2 Zone, Late Oxfordian to Early Kimmeridgian; and 12) Pareodinia capillosa - Tubotuberella apa t ela assemblage, JG Zone, Late Kimmeridgian to Portlandian. The ratio of ...