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A sporomorph ecogroup model for the Northwest European Jurassic – Lower Cretaceousi: concepts and framework

By O.A. Abbink, J.H.A. van Konijnenburg-van Cittert and H. Visscher


Based on recent vegetation distribution and an integration of macropalaeobotanical and palynological information, a palaeocommunity model is explored that may permit detailed interpretations of quantitative sporomorph distribution patterns in the Jurassic and Early Cretaceous of NW-Europe in terms of changes in palaeoenvironment (sea-level, climate). The conceptual model is based on the recognition of Sporomorph Ecogroups (SEGs) that reflect broad co-existing plant communities, viz. upland, lowland, river, pioneer, coastal, and tidally-influenced SEGs. In successive palynological assemblages, shifts in the relative abundance of SEGs are thought to be indicators of sea-level changes. Climatic changes may be recognized through significant shifts within the quantitative composition of individual SEGs

Topics: Earth Sciences, palynology, palaeobotany, Late Jurassic, palaeo-ecology, palaeoclimate, sea-level
Year: 2004
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