DOI: 10.1016/j.palaeo.2014.04.018
论文题名: Latest Cretaceous-earliest Paleogene vegetation and climate change at the high southern latitudes: Palynological evidence from Seymour Island, Antarctic Peninsula
作者: Bowman V.C. ; Francis J.E. ; Askin R.A. ; Riding J.B. ; Swindles G.T.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2014
卷: 408 起始页码: 26
结束页码: 47
语种: 英语
英文关键词: Antarctica
; Late Cretaceous
; Palaeoclimate
; Palaeoecology
; Paleogene
; Pollen
英文摘要: Fluctuations in Late Cretaceous climate were already influencing biotic change prior to the environmental upheaval at the Cretaceous-Paleogene (K-Pg) boundary, but their general nature, magnitude and timing remain controversial. A high-resolution dataset on terrestrially-derived palynomorphs is presented from the high southern palaeolatitudes that unlocks details of small-scale climate variability throughout this period of significant global change. Specifically, this is a quantitative spore and pollen analysis of an expanded uppermost Cretaceous to lowermost Paleogene (Maastrichtian-earliest Danian) shallow marine sedimentary succession from Seymour Island, off the northeastern tip of the Antarctic Peninsula, then (as now) located at ~. 65°S. Using nearest living relatives the first detailed vegetation, habitat and climate reconstruction is presented for the emergent volcanic arc at this time. On the coastal lowlands, a cool to warm temperate rainforest is envisaged growing in a riverine landscape, with both wet (river margin, pond) and relatively dry (interfluve, canopy gap) habitats. Diverse podocarps and southern beech trees grew alongside angiosperm herbs and shrubs in mean annual temperatures of ~. 10-15. °C. Higher altitude araucarian forests gave way to open ericaceous heathland, beyond the tree line, in subalpine to alpine conditions with mean annual temperatures of a cold ~. 5-8. °C. There is no exact modern botanical equivalent, but the closest modern flora is that of the Andes of southern Chile and Argentina. Maastrichtian climate is shown to have fluctuated from cool, humid conditions, through a rapid warming ~. 2. million years prior to the K-Pg transition, followed by cooling during the earliest Danian, a trend supported by previous work on this interval. © 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69305
Appears in Collections: 过去全球变化的重建
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作者单位: British Antarctic Survey, High Cross, Madingley Road, Cambridge CB3 0ET, United Kingdom; British Geological Survey, Environmental Science Centre, Keyworth, Nottingham NG12 5GG, United Kingdom; School of Geography, University of Leeds, Leeds LS2 9JT, United Kingdom
Recommended Citation:
Bowman V.C.,Francis J.E.,Askin R.A.,et al. Latest Cretaceous-earliest Paleogene vegetation and climate change at the high southern latitudes: Palynological evidence from Seymour Island, Antarctic Peninsula[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2014-01-01,408