Author	Smelror, M. and Leereveld, H.
Year	1989
Journal	Palynology 13: 121-141
Title	Dinoflagellate and acritarch assemblages from the Late Bathonian to Early Oxfordian of Montagne Crussol, Rhône Valley, Southern France

Abstract Smelror, M. and Leereveld, H., 1989; Dinoflagellate and acritarch assemblages from the Late Bathonian to Early Oxfordian of Montagne Crussol, Rhône Valley, Southern France. Palynology 13: 121-141 Abstract: Diverse and well-preserved dinoflagellate cyst and acritarch assemblages were recovered from late Bathonian to early Oxfordian strata of Mt. Crussol, southern France. Two distinct microplankton associations are recognized based on the stratigraphic ranges of 89 identified species, together with frequency distribution data of the most abundant taxa. The older, termed the Ctenidodinium combazii--Cleistosphaeridium varispinosum association, comprises the late Bathonian-early Callovian strata of Mt. Crussol, while the younger Compositosphaeridium polonicum-Sentusidinium pilosum association characterizes the ?Late Callovian-Early Oxfordian interval. The palynological data suggest a hiatus and/or a pronounced stratal condensation spanning the middle Callovian and possibly part of the upper Callovian in the study section. Trends in the geographic distribution of selected species are discussed based on comparisons of the marine microfloras from Mt. Crussol and other parts of the Tethyan Realm with assemblages recorded from contemporaneous strata of the Sub-Boreal and Boreal Realm.