Orbitally induced oscillations in the East Antarctic ice sheet at the Oligocene/Miocene boundary

Naish, T.; Woolfe, Ken J.; Barrett, P. J.; Wilson, Gary; Atkins, Cliff; Bohaty, Steven M; Bücker, C.; Claps, M.; Davey, F. J.; Dunbar, Gavin B.; Dunn, Alistair; Fielding, Christopher R.; Florindo, Fabio; Hannah, Michael; Harwood, David M.; Henrys, S. A.; Krissek, L. A.; Lavelle, M.; Meer, Jaap van der; McIntosh, William C.; Niessen, Frank; Passchier, Sandra; Powell, Ross D.; Roberts, Andrew; Sagnotti, Leonardo; Scherer, Reed P.; Strong, C. P.; Talarico, F.; Verosub, Kenneth L.; Villa, Giuliana; Watkins, David; Webb, Peter; Wonik, Thomas

doi:10.1038/35099534

Cited by 253 publications

(182 citation statements)

References 15 publications

Supporting

Mentioning

173

Contrasting

Order By: Relevance

“…There are several reasons for believing that most erosion would have occurred early in the glaciation of Antarctica. First, it is likely that the cyclic glacial episodes from ~34 Ma to ~17 Ma recognised in the till/meltwater couplets in the Cape Roberts' sediment cores, occurred during warmer than present climates (Naish et al, 2001). Such early ice sheets are modelled to be widely associated with subglacial meltwater which would have aided erosion (Jamieson et al 2010).…”

Section: Discussionmentioning

confidence: 99%

Emergence of the Shackleton Range from beneath the Antarctic Ice Sheet due to glacial erosion

Sugden¹,

Fogwill

Hein³

et al. 2014

Geomorphology

View full text Add to dashboard Cite

This paper explores the long-term evolution of a subglacial fjord landscape in the Shackleton Range, Antarctica. We propose that prolonged ice-sheet erosion across a passive continental margin caused troughs to deepen and lower the surrounding icesheet surface, leaving adjacent mountains exposed. Geomorphological evidence suggests a change in the direction of regional ice flow accompanied emergence. Simple calculations suggest that isostatic compensation caused by the deepening of bounding ice-stream troughs lowered the ice-sheet surface relative to the mountains by ~ 800 m. Use of multiple cosmogenic isotopes on bedrock and erratics ( 26 Al, 10 Be, 21 Ne) provides evidence that overriding of the massif and the deepening of the adjacent troughs occurred earlier than the Quaternary. Perhaps this occurred in the mid-Miocene, as elsewhere in East Antarctica in the McMurdo Dry Valleys and the Lambert basin. The implication is that glacial erosion instigates feedback which can change ice-sheet thickness, extent and direction of flow. Indeed, as the sub-glacial troughs evolve over millions of years, they increase topographic relief and this changes the dynamics of the ice sheet.

show abstract

Section: Discussionmentioning

confidence: 99%

Emergence of the Shackleton Range from beneath the Antarctic Ice Sheet due to glacial erosion

Sugden¹,

Fogwill

Hein³

et al. 2014

Geomorphology

View full text Add to dashboard Cite

show abstract

“…Examples of such stratal architecture come from late Paleozoic, Neogene and Pleistocene successions formed under direct or indirect influence of large-scale glacioeustatic sea-level changes. The distinctive vertical stacking pattern initially came to light in studies of Neogene continental margin successions around Antarctica (Bartek et al, 1991(Bartek et al, , 1997Fielding et al, 2000Fielding et al, , 2001Naish et al, 2001), but has also been documented from Plio-Pleistocene successions in New Zealand (Naish and Kamp, 1997;Saul et al, 1999), the Miocene Chesapeake Group of eastern USA (Kidwell, 1997), the Miocene of western Chile and Ecuador (Di Cantalamessa et al, 2005Cantalamessa et al, , 2007, and latterly from Lower Permian strata in the Sydney Basin of eastern Australia (Fielding et al, 2006).…”

Section: Coastal To Shallow-water Siliciclastic Settingsmentioning

confidence: 99%

“…Examples from the Permian marine record in eastern Australia indicate paleobathymetric changes of 70-80 m for sequences formed during glacial times, whereas similar units deposited in the absence of glacial influence show facies juxtapositions that indicate only 20-30 m shifts across sequence boundaries (Fielding et al, 2008). The temporal scale of such glacial cycles is often within the range of orbital forcing (10 1 -10 2 kyr; Naish et al, 2001), although a complex interplay of multiple mechanisms that may drive climate changes cannot be ruled out since Icehouse periods have dominated the Earth's climate for millions of years at a time. Posamentier and Kolla, 2003).…”

Section: Coastal To Shallow-water Siliciclastic Settingsmentioning

confidence: 99%

Towards the standardization of sequence stratigraphy

Catuneanu

Abreu

Bhattacharya

et al. 2009

Earth-Science Reviews

1,273

726

View full text Add to dashboard Cite

Part of the Earth Sciences CommonsThis Article is brought to you for free and open access by the Earth and Atmospheric Sciences, Department of at DigitalCommons@University of Nebraska -Lincoln. It has been accepted for inclusion in Papers in the Earth and Atmospheric Sciences by an authorized administrator of DigitalCommons@University of Nebraska -Lincoln. AbstractSequence stratigraphy emphasizes facies relationships and stratal architecture within a chronological framework. Despite its wide use, sequence stratigraphy has yet to be included in any stratigraphic code or guide. This lack of standardization reflects the existence of competing approaches (or models) and confusing or even conflicting terminology. Standardization of sequence stratigraphy requires the definition of the fundamental model-independent concepts, units, bounding surfaces and workflow that outline the foundation of the method. A standardized scheme needs to be sufficiently broad to encompass all possible choices of approach, rather than being limited to a single approach or model.A sequence stratigraphic framework includes genetic units that result from the interplay of accommodation and sedimentation (i.e., forced regressive, lowstand and highstand normal regressive, and transgressive), which are bounded by "sequence stratigraphic" surfaces. Each genetic unit is defined by specific stratal stacking patterns and bounding surfaces, and consists of a tract of correlatable depositional systems (i.e., a "systems tract"). The mappability of systems tracts and sequence stratigraphic surfaces depends on depositional setting and the types of data available for analysis. It is this high degree of variability in the precise expression of sequence stratigraphic units and bounding surfaces that requires the adoption of a methodology that is sufficiently flexible that it can accommodate the range of likely expressions. The integration of outcrop, core, well-log and seismic data affords the optimal approach to the application of sequence stratigraphy. Missing insights from one set of data or another may limit the "resolution" of the sequence stratigraphic interpretation. 1 2 c a t u n e a n u e t a l . i n e a r t h -science r e v i e w s 92 (2009)

show abstract

“…Meanwhile, continental areas likewise underwent significant climate change during Oi2b.1 and Mi1. The palynological record of the Cape Roberts Drillhole CRP-2/2A in the Victoria Land Basin in Antarctica shows a cooling trend in the summer temperatures from the late Oligocene to the early Miocene [43], and the Drillhole CRP-2 recorded the expansion of the Antarctic ice sheet during Mi1 [44]. Temperatures and precipitation levels reconstructed using flora assemblages in central Europe also decreased during 24-23 Ma [45].…”

Section: Discussionmentioning

confidence: 99%

Synchronous drying and cooling in central Asia during late Oligocene

et al. 2013

View full text Add to dashboard Cite

Aridification of central Asia during late Oligocene and Early Miocene has been documented by numerous eolian records from the North Pacific and central Asia. However, direct evidence of aridity from the interior of the arid zone is still rather scarce. To better reconstruct the climate history in central Asia during the late Oligocene, we have analyzed ostracod assemblages and gypsum content in the sediments from the lacustrine Jingou River section in the northern Tianshan Mountains. Our results show that the cold water species Candona cf. Neglecta and Pseudocandona albicans replaced the warm water species Ilyocypris bradyi and Ilyocypris sp. to become the dominant species at 23.8 Ma, indicating significant cooling in central Asia at that time. At the same time, a substantial increase in gypsum content indicates the intensification of central Asian drying. The synchronous cooling and drying approximately coincided with the Oi2b.1 and/or Mi1 events, implying a causal linkage between late Oligocene global cooling and central Asian aridity.

show abstract

Orbitally induced oscillations in the East Antarctic ice sheet at the Oligocene/Miocene boundary

Cited by 253 publications

References 15 publications

Emergence of the Shackleton Range from beneath the Antarctic Ice Sheet due to glacial erosion

Emergence of the Shackleton Range from beneath the Antarctic Ice Sheet due to glacial erosion

Towards the standardization of sequence stratigraphy

Synchronous drying and cooling in central Asia during late Oligocene

Contact Info

Product

Resources

About