Silcrete plant fossils from Lightning Ridge, New South Wales: new evidence for climate change and monsoon elements in the Australian Cenozoic
Silcrete plant fossils from Lightning Ridge, New South Wales: new evidence for climate change and monsoon elements in the Australian Cenozoic
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DOI：
10.1071/bt11037
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发表时间：
2011-01-01
影响因子：
1.1
通讯作者：
Kanold, Karola
中科院分区：
文献类型：
--
作者：
Carpenter, Raymond J.;Goodwin, Matthew P.;Kanold, Karola
对闪电岭蛋白石田中不同的新生代(可能是渐新世晚期至中新世中晚期)宏体化石进行了图解和讨论。被鉴定为现存分类群或与现存分类群密切可比的标本包括蕨类植物(Lygodium，Gleichenia和其他)，在澳大利亚现已灭绝的针叶树(Dacrydium，Retrophy llum和Papuacedrus)，樟科(隐果/肉桂)，硬叶Proteaceae(Banksia，Lomatia和Grevillea)，Cunoniaceae/Elaecarpaceae和Eucalyptus(和/或其他桃金娘科)。总体而言，至少识别出4个蕨类、3个针叶植物和30个被子植物分类群。那里的气候支持了许多物种在潮湿的澳大拉西亚栖息地，包括热带雨林中有近亲。然而，更干燥或更季节性(季风性)的方面，特别是裂叶的存在，类似于现存的短茎植物(锦葵科)，刺桐(豆科)和部落Cercideae(豆科)。被子植物叶片狭窄、锯齿和/或深裂的普遍存在，也表明了一定程度的水分胁迫。
Diverse Cenozoic (possibly latest Oligocene to mid-late Miocene) macrofossils from the Lightning Ridge opal fields are illustrated and discussed. Specimens identified to, or closely comparable with, extant taxa include ferns (Lygodium, Gleichenia and others), conifers now extinct in Australia (Dacrydium, Retrophyllum and Papuacedrus), Lauraceae (Cryptocarya/Cinnamomum), sclerophyllous Proteaceae (Banksia, Lomatia and Grevillea), Cunoniaceae/Elaeocarpaceae and Eucalyptus (and/or other Myrtaceae). Overall, at least four fern, three conifer and 30 angiosperm taxa are recognised. The climate supported many species with close relatives in wet Australasian habitats, including rainforests. However, a drier or more seasonal (?monsoonal) aspect is especially indicated by the presence of lobed leaves that resemble extant species of Brachychiton (Malvaceae), Erythrina (Fabaceae) and tribe Cercideae (Fabaceae). A degree of water stress is also suggested by the prevalence of narrow, toothed and/or deeply lobed angiosperm leaves.