IGGCAS OpenIR  > 岩石圈演化国家重点实验室
Major shoreline retreat and sediment starvation following Snowball Earth
Nordsvan, Adam R.1; Barham, Milo2; Cox, Grant; Kirscher, Uwe1,3; Mitchell, Ross N.1,4
2019-12-01
Source PublicationTERRA NOVA
ISSN0954-4879
Volume31Issue:6Pages:495-502
AbstractWhile cap dolostones are integral to the Snowball Earth hypothesis, the current depositional model does not account for multiple geological observations. Here we propose a model that rationalises palaeomagnetic, sequence-stratigraphic and sedimentological data and supports rapid deglaciation with protracted cap dolostone precipitation. The Snowball Earth hypothesis posits that a runaway ice-albedo can explain the climate paradox of Neoproterozoic glacial deposits occurring at low palaeolatitudes. This scenario invokes volcanic degassing to increase atmospheric greenhouse gases to a critical threshold that overcomes the albedo effect and brings the planet back from the ice-covered state. Once this occurs, Earth should shift rapidly from a snowball to an extreme greenhouse. However, cap dolostone units overlying glacial sediments, typically interpreted as transgressive deposits, exhibit multiple magnetic reversals indicating they accumulated in >10(5) years. By reviewing modern post-glacial systems, sequence stratigraphic concepts and principles of sedimentology, we suggest that cap dolostones are not restricted to the transgression but rather represent sediment starvation following a major landward shoreline migration associated with the demise of Snowball Earth. Thus, the duration in which cap dolostone accumulated is not directly coupled to the timescale of the Snowball Earth deglaciation.
DOI10.1111/ter.12426
Funding OrganizationAustralian Postgraduate Award ; Australian Postgraduate Award ; Curtin Research Scholarship ; Curtin Research Scholarship ; Australian Research Council ; Australian Research Council ; Australian Postgraduate Award ; Australian Postgraduate Award ; Curtin Research Scholarship ; Curtin Research Scholarship ; Australian Research Council ; Australian Research Council ; Australian Postgraduate Award ; Australian Postgraduate Award ; Curtin Research Scholarship ; Curtin Research Scholarship ; Australian Research Council ; Australian Research Council ; Australian Postgraduate Award ; Australian Postgraduate Award ; Curtin Research Scholarship ; Curtin Research Scholarship ; Australian Research Council ; Australian Research Council
WOS KeywordCAP CARBONATE ; CONTINENTAL-MARGIN ; LATE PLEISTOCENE ; LOW-LATITUDE ; INNER-CORE ; SEA-LEVEL ; STRATIGRAPHY ; CLASSIFICATION ; FLUCTUATIONS ; GLACIATION
Language英语
Funding ProjectAustralian Postgraduate Award ; Curtin Research Scholarship ; Australian Research Council
Funding OrganizationAustralian Postgraduate Award ; Australian Postgraduate Award ; Curtin Research Scholarship ; Curtin Research Scholarship ; Australian Research Council ; Australian Research Council ; Australian Postgraduate Award ; Australian Postgraduate Award ; Curtin Research Scholarship ; Curtin Research Scholarship ; Australian Research Council ; Australian Research Council ; Australian Postgraduate Award ; Australian Postgraduate Award ; Curtin Research Scholarship ; Curtin Research Scholarship ; Australian Research Council ; Australian Research Council ; Australian Postgraduate Award ; Australian Postgraduate Award ; Curtin Research Scholarship ; Curtin Research Scholarship ; Australian Research Council ; Australian Research Council
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000490085300001
PublisherWILEY
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/93895
Collection岩石圈演化国家重点实验室
Corresponding AuthorNordsvan, Adam R.
Affiliation1.Curtin Univ, Ctr Excellence Core Crust Fluid Syst CCFS, Inst Geosci Res TIGeR,Earth Dynam Res Grp, Australian Res Council,Sch Earth & Planetary Sci, Perth, WA 6845, Australia
2.Curtin Univ, Ctr Explorat Targeting Curtin Node, Sch Earth & Planetary Sci, Perth, WA, Australia
3.Eberhard Karls Univ Tubingen, Dept Geosci, Tubingen, Germany
4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Nordsvan, Adam R.,Barham, Milo,Cox, Grant,et al. Major shoreline retreat and sediment starvation following Snowball Earth[J]. TERRA NOVA,2019,31(6):495-502.
APA Nordsvan, Adam R.,Barham, Milo,Cox, Grant,Kirscher, Uwe,&Mitchell, Ross N..(2019).Major shoreline retreat and sediment starvation following Snowball Earth.TERRA NOVA,31(6),495-502.
MLA Nordsvan, Adam R.,et al."Major shoreline retreat and sediment starvation following Snowball Earth".TERRA NOVA 31.6(2019):495-502.
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