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Systematic analysis of phyllocarid mandibles from the Mississippian Marshall Formation in Southern Michigan and the Late Devonian Silica Formation in Northwestern Ohio in the context of phyllocarid mandibles from throughout the continental United StatesTungate, Joshua James 18 January 2023 (has links)
No description available.
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Quantifying the Biotic Response to the Clarksville Phase of the Richmondian InvasionForsythe, Ian J. 23 May 2022 (has links)
No description available.
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Macro- and microfossils from the Upper Cretaceous sedimentary rocks of Hornby Island, British Columbia, CanadaMcLachlan, Sandy Melvin Stuart 22 August 2017 (has links)
Heteromorph ammonites and dinoflagellate cysts from the Upper Cretaceous Northumberland Formation on Hornby Island, British Columbia, Canada are examined. The collection and preparation of new material has enabled the recognition of eleven species of which only three have been reported from the locality. Of these taxa represented from three heteromorph ammonite families in the study area, five are new occurrences and three are new to science. This expansion of the Hornby Island ammonite fauna is presented alongside a pioneering taxonomic survey of dinoflagellate cysts from the same rocks. Together, these macro- and microfossils reinforce a late Campanian age for the Northumberland Formation with the upper extent of the section approaching the Campanian-Maastrichtian boundary (CMB) interval. The palaeoecology
and evolutionary relationships of these heteromorph ammonoids are considered with new insights into their ontogenetic development and neritic palaeoenvironmental circumstances. The dinoflagellate cysts and associated terrestrial palynomorphs have also allowed for enhanced palaeoenvironmental reconstruction and depositional setting inference. The scope of the studied material, and the presence of key index taxa, enables refined biostratigraphy and a stronger basis for correlation of the Hornby Island succession with neighboring coeval biotic provinces. / Graduate / 2018-08-10
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Are Cincinnatian (Late Ordovician) Niche Stability Responses to Variable Environmental Changes Congruent Across Clades, Taxonomic Scales, and Through Time?Brame, Hannah-Maria R. 12 June 2013 (has links)
No description available.
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