OR/18/139 Chitinozoan biostratigraphy

Melchin, M J1, Davies, J R2, De Weirdt, J3, Russell, C4, Vandenbroucke, T R A3, Zalasiewicz, J A. 2018. Integrated stratigraphic study of the Rhuddanian-Aeronian (Llandovery, Silurian) boundary succession at Rheidol Gorge, Wales: a preliminary report. British Geological Survey Internal Report, OR/18/139. 1  Department of Earth Sciences, St. Francis Xavier University, Antigonish, NS, Canada 2  Department of Geography & Earth Sciences, Aberystwyth University, Aberystwyth SY23 3DB, UK (also British Geological Survey, Cardiff Office, Cardiff University, Main Building, Park Place,Cardiff, CF10 3AT, Wales, UK) 3  Department of Geology, Ghent University, Krijgslaan 281 S8, BE-9000, Ghent, Belgium 4  School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK 5  Department of Geology, University of Leicester, University Road, Leicester LE1 7RH, UK

The chitinozoans from the Rheidol Gorge section are being studied by TRAV and JDW. Twenty-one samples spanning most of our measured interval were collected for chitinozoans, almost all of which have yielded identifiable, often fairly well-preserved specimens (Figure 7). Nine species can be identified, four of which are currently in open nomenclature. All species occur essentially through the whole study interval and are representative of the Spinchitina maennili Biozone, which is characteristic of late Rhuddanian-early Aeronian strata in many regions.

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Figure 7    Representative chitinozoan taxa.