Chitinozoans from the upper Tremadocian (Lower Ordovician) Watch Hill Formation of the Lake District, northern England
- Author
- Chloé EA Amberg, Thijs Vandenbroucke (UGent) , Stewart G Molyneux and Thomas Servais
- Organization
- Abstract
- The Global Stratotype Section and Point (GSSP) for the Lower Ordovician Floian Stage is defined by the first appearance datum (FAD) of the graptolite Tetragraptus approximatus at Diabasbrottet Quarry, Hunneberg, southern Sweden. Correlation of sections with the Floian GSSP when graptolites are absent, however, must rely on other criteria. Among other fossil groups with potential for biostratigraphical correlation at this level are chitinozoans. Here we describe a chitinozoan assemblage from the Watch Hill Formation in the Skiddaw Group of northern England. The Watch Hill Formation is dated on graptolite evidence as late Tremadocian, but the assemblage contains Euconochitina symmetrica, a species previously considered to indicate the eponymous lowermost Arenig (Floian) chitinozoan biozone in a long-established Gondwanan Ordovician biozonal scheme. The hitherto earliest Floian index species has also been reported recently from Tremadocian successions in South China and Morocco. We here confirm its extended range into the Tremadocian and its continued significance as an index species for the Tremadocian–Floian boundary interval.
- Keywords
- chitinozoans, Tremadocian, Floian, Early Ordovician, biostratigraphy, HISTORICAL TYPE AREA, WALES, BIOSTRATIGRAPHY, BIODIVERSIFICATION, STRATIGRAPHY, AVALONIA, SECTION, ARENIG, SERIES, CHINA
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Citation
Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-8564527
- MLA
- Amberg, Chloé EA, et al. “Chitinozoans from the Upper Tremadocian (Lower Ordovician) Watch Hill Formation of the Lake District, Northern England.” PALYNOLOGY, vol. 41, no. suppl. 1, 2017, pp. 23–30, doi:10.1080/01916122.2017.1348721.
- APA
- Amberg, C. E., Vandenbroucke, T., Molyneux, S. G., & Servais, T. (2017). Chitinozoans from the upper Tremadocian (Lower Ordovician) Watch Hill Formation of the Lake District, northern England. PALYNOLOGY, 41(suppl. 1), 23–30. https://doi.org/10.1080/01916122.2017.1348721
- Chicago author-date
- Amberg, Chloé EA, Thijs Vandenbroucke, Stewart G Molyneux, and Thomas Servais. 2017. “Chitinozoans from the Upper Tremadocian (Lower Ordovician) Watch Hill Formation of the Lake District, Northern England.” PALYNOLOGY 41 (suppl. 1): 23–30. https://doi.org/10.1080/01916122.2017.1348721.
- Chicago author-date (all authors)
- Amberg, Chloé EA, Thijs Vandenbroucke, Stewart G Molyneux, and Thomas Servais. 2017. “Chitinozoans from the Upper Tremadocian (Lower Ordovician) Watch Hill Formation of the Lake District, Northern England.” PALYNOLOGY 41 (suppl. 1): 23–30. doi:10.1080/01916122.2017.1348721.
- Vancouver
- 1.Amberg CE, Vandenbroucke T, Molyneux SG, Servais T. Chitinozoans from the upper Tremadocian (Lower Ordovician) Watch Hill Formation of the Lake District, northern England. PALYNOLOGY. 2017;41(suppl. 1):23–30.
- IEEE
- [1]C. E. Amberg, T. Vandenbroucke, S. G. Molyneux, and T. Servais, “Chitinozoans from the upper Tremadocian (Lower Ordovician) Watch Hill Formation of the Lake District, northern England,” PALYNOLOGY, vol. 41, no. suppl. 1, pp. 23–30, 2017.
@article{8564527, abstract = {{The Global Stratotype Section and Point (GSSP) for the Lower Ordovician Floian Stage is defined by the first appearance datum (FAD) of the graptolite Tetragraptus approximatus at Diabasbrottet Quarry, Hunneberg, southern Sweden. Correlation of sections with the Floian GSSP when graptolites are absent, however, must rely on other criteria. Among other fossil groups with potential for biostratigraphical correlation at this level are chitinozoans. Here we describe a chitinozoan assemblage from the Watch Hill Formation in the Skiddaw Group of northern England. The Watch Hill Formation is dated on graptolite evidence as late Tremadocian, but the assemblage contains Euconochitina symmetrica, a species previously considered to indicate the eponymous lowermost Arenig (Floian) chitinozoan biozone in a long-established Gondwanan Ordovician biozonal scheme. The hitherto earliest Floian index species has also been reported recently from Tremadocian successions in South China and Morocco. We here confirm its extended range into the Tremadocian and its continued significance as an index species for the Tremadocian–Floian boundary interval.}}, author = {{Amberg, Chloé EA and Vandenbroucke, Thijs and Molyneux, Stewart G and Servais, Thomas}}, issn = {{0191-6122}}, journal = {{PALYNOLOGY}}, keywords = {{chitinozoans,Tremadocian,Floian,Early Ordovician,biostratigraphy,HISTORICAL TYPE AREA,WALES,BIOSTRATIGRAPHY,BIODIVERSIFICATION,STRATIGRAPHY,AVALONIA,SECTION,ARENIG,SERIES,CHINA}}, language = {{eng}}, number = {{suppl. 1}}, pages = {{23--30}}, title = {{Chitinozoans from the upper Tremadocian (Lower Ordovician) Watch Hill Formation of the Lake District, northern England}}, url = {{http://doi.org/10.1080/01916122.2017.1348721}}, volume = {{41}}, year = {{2017}}, }
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