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Abstract
The stratigraphic distribution of Callovian to middle Oxfordian (macrocephalus—plicatilis ammonite zones) dinocysts from several localities in England, Scotland and France is evaluated. Using 41 selected species and their relative abundances, this chronostrati‐graphic interval is divided into four zones and five subzones. The zonal scheme is considered to be applicable throughout the northwest European Boreal Province, and is of proven value in offshore hydrocarbon exploration.
The following taxonomic combinations are proposed: Cassiculosphaeridia dictydia (Sarjeant) comb, nov., Chytroeisphaeridia hyalina (Raynaud) comb, nov., Acanthaulax areolata (Sarjeant) comb, nov., and Lithodinia borealis (Sarjeant) comb. nov.
Notes
Present address: Gearhart Geodata Services Dyce, Aberdeen, U.K.
