Correlated Biostratigraphy and Palaeoecology of Microplankton from the Bearpaw Formation (Campanian-Maastrichtian) of Alberta, Canada
Semi-quantitative analyses of the assemblages record the transgressive-regressive episodes of the Bearpaw cyclothem. Increases in the relative abundances of gonyaulacacean cysts, numbers of dinocysts compared to terrestrial palynomorphs and assemblage diversity correlate with transgressive episodes, with the richest assemblages occurring during periods of open, offshore to neritic conditions correlated with the cyclothems transgressive peak.
Two new species of dinoflagellate cyst are described. The first, Dinoflagellate sp. 1, is a novel taxon, while the second, Downiesphaeridium sp. A, is a chorate cyst similar to Mesozoic forms previously ascribed to Cleistosphaerdium diversispinosum Davey et al. emend. Eaton et al.
Advisor:Walker, Ernest G.; Renaut, Robin W.; Merriam, James B.; Braman, Dennis; Basinger, James F.; Ansdell, Kevin M.
School:University of Saskatchewan
School Location:Canada - Saskatchewan
Source Type:Master's Thesis
Keywords:stratigraphy campanian maastrichtian boundary magnetostratigraphy magnetobiostratigraphy dinocyst dinoflagellate western interior basin
Date of Publication:03/28/2007