Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/3498
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dc.contributor.authorGupta, Neal S.-
dc.date.accessioned2021-01-04T04:45:59Z-
dc.date.available2021-01-04T04:45:59Z-
dc.date.issued2012-
dc.identifier.citationPalaios, 27(5), pp.279-287.en_US
dc.identifier.otherhttp://dx.doi.org/10.2110/palo.2011.p11-031r-
dc.identifier.urihttps://www.crossref.org/iPage?doi=10.2110%2Fpalo.2011.p11-031r-
dc.identifier.urihttp://hdl.handle.net/123456789/3498-
dc.descriptionOnly IISERM authors are available in the record.-
dc.description.abstractThe molecular preservation of exceptionally preserved conifer needles from middle Miocene and Pliocene deposits on Banks Island, Canada, was investigated using pyrolysisgas chromatographymass spectrometry (Py-GC-MS). Solvent-extracted residues from Miocene Larix, Glyptostrobus, and Pinus, Pliocene Picea, and their associated bulk material, yielded abundant polysaccharide pyrolysis products, such as 2-methylfuran, 2-furaldehyde, and levoglucosan, indicating excellent molecular preservation. Comparison of pyrolysates of individual plant taxa and bulk material from the same deposits revealed the dominance of particular plant taxa in these high latitude floras. Comparison with fossil Lagersttten from Ellesmere Island (late Paleocene) and Axel Heiberg Island (middle Eocene), both in the Canadian Arctic Archipelago, and Clarkia in Idaho, United States (middle Miocene), demonstrated that the quality of molecular preservation of material from Banks Island is similar to that of Axel Heiberg Island and lies between those of Ellesmere Island and the Clarkia deposit. The ranking of molecular preservation was paralleled by scanning electron microscopy (SEM) observations. Analysis of Larix and Glyptostrobus from different geological ages (Eocenerecent) and locations indicated that age does not correlate with molecular preservation in these fossil Lagersttten. When relative abundance ratios of vinyl phenol (m/z 91120), guaiacyl (m/z 109124), and levoglucosan (m/z 6073) are used as indicators of the preservation of cutin, lignin, and cellulose, our results suggest that variations in the pyrolysates among several genera reflect different original molecular compositions as well as paleoenvironmental conditions for preservation. The data also illuminate the role of labile biomolecules in the taphonomy of three-dimensionally preserved morphological structures in these Arctic plant fossils.en_US
dc.language.isoenen_US
dc.publisherSociety for Sedimentary Geologyen_US
dc.subjectCenozoicen_US
dc.subjectConiferous treeen_US
dc.subjectEoceneen_US
dc.subjectFossil recorden_US
dc.titleMolecular preservation of cenozoic conifer fossil lagersttten from banks island, the canadian arcticen_US
dc.typeArticleen_US
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