Late Cretaceous–Cenozoic climatic variations of the northern Antarctic Peninsula: new geochemical evidence and review

Dingle, R. V.; Lavelle, M.

doi:10.1016/s0031-0182(98)00056-x

Cited by 120 publications

(66 citation statements)

References 35 publications

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“…In other Antarctic paleoclimate studies evidence for strong warmth at this time was found by Dingle and Lavelle (1998) in their analyses of clay minerals and from analysis of fossil woods . This warm peak may have also been the trigger for the expansion of the angiosperms in the Antarctic, represented by a marked increased abundance of angiosperm pollen in Turonian sediments (Keating et al, 1992).…”

Section: Francis Figmentioning

confidence: 71%

100 Million Years of Antarctic Climate Evolution: Evidence from Fossil Plants

Francis¹,

Ashworth²,

Cantrill³

et al. 2007

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Section: Francis Figmentioning

confidence: 71%

100 Million Years of Antarctic Climate Evolution: Evidence from Fossil Plants

Francis¹,

Ashworth²,

Cantrill³

et al. 2007

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“…Cool climatic conditions for the early Paleocene are also inferred from low-resolution studies of Antarctic plant fossils and sediments (Francis 1991;Askin 1992;Dingle & Lavelle 1998) and New Zealand fossil leaf physiognomy (Kennedy 2003). The terrestrial palynomorph record at mid Waipara (Vajda & Raine 2003) indicates that cool climatic conditions began within Foraminiferal Zone Pa and persisted into upper Radiolarian Zone RP3, that is, a duration equivalent to the inferred cool climate period in Marlborough.…”

Section: Relationship Between Trends In Biosiliceous Productivity Andmentioning

confidence: 90%

The Cretaceous/Tertiary boundary event in New Zealand: Profiling mass extinction

Hollis¹

2003

New Zealand Journal of Geology and Geophysics

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Of over 20 known Cretaceous/Tertiary (K/T) boundary sections in the New Zealand region, 6 in the northern South Island were selected for detailed biostratigraphic and paleoenvironmental study because of their apparent stratigraphic completeness and the range of depositional environments represented. These sections represent the only known southern high-latitude (55-60°S) transect of the K/T boundary transition from continental slope to terrestrial mire.The K/T boundary is marked by deposition of an impact fallout layer in four of these sections, and a disconformity representing a hiatus of < 100 000 yr in the remaining two sections (Mead and Branch Streams). In the terrestrial Moody Creek Mine and shallow marine mid-Waipara sections, rapid and widespread destruction of forests is shown by abrupt replacement of mixed forest pollen and spore assemblages by assemblages dominated by few species of ground ferns. Foraminiferal and radiolarian biostratigraphy indicates that within 100 000 yr these ferns were replaced by a cool-temperate conifer-dominated assemblage that persisted until c. 63.5 Ma. In the marine sections, an abrupt decrease in carbonate content reflects a major decline in carbonate production associated with mass extinction of calcareous plankton, although several smaller species of planktic foraminifera persist for c. 100 000 yr into the Paleocene.In four sections in Marlborough (Flaxbourne, Woodside, Mead, and Branch), which represent a transect across a coastal upwelling zone, paleoproductivity proxies (excess SiO 2 , excess Ba, Ba/Al, δ 13 C) indicate that the decline in calcareous plankton was partly offset by sustained siliceous plankton productivity. Extinctions of thermophilic foraminifera, survival of cosmopolitan foraminifera, and expansion of diatoms and spumellarian radiolarians indicate that pronounced cooling occurred across the K/T boundary. A subsequent decline in planktic foraminifera and in carbonate content, associated with a progressive increase in siliceous plankton productivity, indicates that further cooling resulted in dominantly biosiliceous sediment being deposited in the core of the Marlborough upwelling zone from c. 64.9 to 63.5 Ma. The onset of this biosiliceous event at c. 64. Ma and a later major increase in biogenic silica in the deepwater sections (Flaxbourne, Woodside) at c. 64.6 Ma are correlated with sea-level falls in the shelf section (Branch) and are also linked to eustatic events recorded in Europe and North and Central America.These early Paleocene regressive events within a cool climatic regime are the probable cause of incomplete K/T boundary records in most of New Zealand. It remains uncertain if they are directly related to the K/T bolide impact, the short-term effects of which may have disrupted the global climate system for millions of years, or are related to other factors such as tectonism or fluctuating CO 2 emissions from Deccan volcanism.

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“…Barker et al, 1988;Larter and Barker, 1989;Dingle and Lavelle, 1998;Barker, 2001;Zachos et al, 2001;Maldonado et al, 2006;Miller et al, 2008;Smith and Anderson, 2010;Davies et al, 2012). Atmospheric pCO 2 levels decreased further and more rapidly from~930 to 400 ppm during 25-23 Ma Pagani et al, 2005;Zachos and Kump, 2005;Tripati et al, 2009Tripati et al, , 2011.…”

Section: Tectonic Palaeoceanographic and Palaeoclimate Settingmentioning

confidence: 97%