Research paperSouthern polar forests: The Early Cretaceous floras of Victoria and their palaeoclimatic significance
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A polar dinosaur feather assemblage from Australia
2020, Gondwana ResearchCitation Excerpt :Irrespectively, all of these calculations contextually place the Koonwarra Fossil Bed feather assemblage well within the Mesozoic southern polar circle. Accumulated fossil (Douglas and Williams, 1982; Douglas, 1986; Rich et al., 1988; Rich and Vickers-Rich, 1997), sedimentological (Constantine et al., 1998) and isotopic data (Gröcke, 1997; Ferguson et al., 1999; Price et al., 2012) further infer seasonally cool-temperate to cold conditions (potentially with winter freezing) throughout the Aptian, with prolonged periods of polar darkness (Poropat et al., 2018) that must have impacted on the evolution of ecosystems in southeastern Australia at that time. All of the Koonwarra Fossil Bed feather remains have been deposited in the Victorian state government palaeontology collection at NMV (Table 1).
Biomarker signatures of Upper Cretaceous Latrobe Group hydrocarbon source rocks, Gippsland Basin, Australia: Distribution and palaeoenvironment significance of aliphatic hydrocarbons
2018, International Journal of Coal GeologyCitation Excerpt :Angiosperms first appeared, but were uncommon during this period (Burger 1980). Gymnosperms, such as Araucariaceae, Podocarpaceae and Taxodiaceae, were still the dominant vegetation type (Douglas and Williams 1982; Dettmann et al. 1992). The climate during the Albian was extrapolated to have been wet and cool-cold, which is also verified by isotopic data from Gregory et al. (1989) who suggested that early Cretaceous palaeotemperatures of southeastern Australia (including Otway and Gippsland Basins) were 0–5 °C.
Early angiosperm diversification in the Albian of southeast Australia: implications for flowering plant radiation across eastern Gondwana
2016, Review of Palaeobotany and PalynologyLate Cretaceous (Cenomanian-Turonian) macroflora from the Chatham Islands, New Zealand: Bryophytes, lycophytes and pteridophytes
2015, Gondwana ResearchCitation Excerpt :Lycopodites sp. reported by Rigby (1977) from Middle Jurassic strata of Queensland, Australia (redrawn and ascribed to L. gracilis (Morris) Seward and Sahni, 1920 by Mcloughlin et al., 2014), has falcate, rather than elliptical, leaves. McQueen (1956) recorded a specimen of ‘Lycopdium cf. volubile Forster f. 1786’ from the Seymour River coal measures (Warder Formation), middle Clarence Valley, New Zealand, which have since been estimated as Albian–Cenomanian in age (Douglas and Williams, 1982; Browne and Reay, 1993). The specimen illustrated is much larger than the present specimen, and exhibits linear, falcate leaves.
Barremian-Cenomanian palaeotemperatures for Australian seas based on new oxygen-isotope data from belemnite rostra
2012, Palaeogeography, Palaeoclimatology, PalaeoecologyCitation Excerpt :They also conflict with the palaeobotanical record. Douglas and Williams (1982) inferred an ice‐free, warm‐ to cool‐temperate climatic context for Early Cretaceous floras of Victoria. The degree to which such isotopic analyses reflect the δ18O of surface waters, an assumption made in deriving the palaeotemperature estimates, is questionable.