FTIR-derived characteristics of fossil-gymnosperm leaf remains of Cordaites principalis and Cordaites borassifolius (Pennsylvanian, Maritimes Canada and Czech Republic) |
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Authors: | E. L. Zodrow M. Mastalerz Z. imnek |
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Affiliation: | a Department of Earth Sciences, University College of Cape Breton, P.O. 5300, Sydney, Nova Scotia, Canada B1P 6L2;b Indiana Geological Survey, Indiana University, 611 N. Walnut Grove, Bloomington, IN 47405, USA;c Czech Geological Survey, Klaróv 3/131, 118 21, Praha 1, Czech Republic |
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Abstract: | Cordaites principalis and Cordaites borassifolius, gymnosperm trees of the Carboniferous, are distinguished based on compression and cuticular morphology. A new distinction between them is suggested on the basis of differences in functional groups. Cuticular and compression spectra of C. borassifolius have lower CH2/CH3 ratios, suggesting more branched aliphatic chains in comparison with cuticles and compressions of C. principalis. Other differences are observed with Fourier transform infrared spectroscopy (FTIR) technique, but they vary from sample to sample of the two species to suggest other than chemotaxonomic-based sources of variations. |
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Keywords: | Carboniferous cordaites species FTIR spectra Chemotaxonomy |
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