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 chronostratigraphic 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.
Indian Knoll is the largest Archaic shell midden excavated by WPA archaeologists in Kentucky. Situated in a large alluvial valley, the site is not associated with a known river shoal as might be expected, making its fluvial and geomorphic setting of interest. Based on sediment cores and auger samples, undisturbed portions of the site remain despite extensive excavations. In undisturbed portions, a shell-bearing layer is overlain by a shell-free midden layer. Profiles of organic matter and calcium carbonate content for both layers are similar to those of other Green River shell middens. New radiocarbon determinations date the shell deposit at 5590-4530 cal yr B.P. Analysis of mussel species collected from the Indian Knoll indicates that shell fishing took place in a swiftly flowing, shallow to moderately deep setting of the main river channel. Overall, the prehistoric river setting adjacent to Indian Knoll was characterized by deeper water on average with variable but finer-grained substrate compared to other Green River shell midden sites. ᭧
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