2019
DOI: 10.1111/ter.12426
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Major shoreline retreat and sediment starvation following Snowball Earth

Abstract: While 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… Show more

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Cited by 12 publications
(3 citation statements)
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“…Here, the ice sheets may have continued to display precession‐related fluctuations and reduced much more rapidly in mass than in surface area. Such a cryosphere, in which sediment would have been trapped in continental interiors, is consistent with a sediment‐starved marine cap succession (Nordsvan et al, 2019). In this way, even allowing eustatic sea‐level rise to coincide with cap dolostone deposition, the final deglaciation and cap carbonate deposition can be phased over a 10 5 to 10 6 year time frame rather than <10 4 years.…”
Section: Discussionsupporting
confidence: 65%
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“…Here, the ice sheets may have continued to display precession‐related fluctuations and reduced much more rapidly in mass than in surface area. Such a cryosphere, in which sediment would have been trapped in continental interiors, is consistent with a sediment‐starved marine cap succession (Nordsvan et al, 2019). In this way, even allowing eustatic sea‐level rise to coincide with cap dolostone deposition, the final deglaciation and cap carbonate deposition can be phased over a 10 5 to 10 6 year time frame rather than <10 4 years.…”
Section: Discussionsupporting
confidence: 65%
“…Peng et al, 2011) which in turn reflects the shallow intracratonic basin of deposition. The paucity of siliciclastic detritus in most cap successions can be explained either in a model of very rapid deposition in an ocean grossly supersaturated for CaCO 3 (Hoffman et al, 2021) or by slow deposition on a shelf starved of sediment because of sediment trapping in estuaries (Nordsvan et al, 2019). In the discussion, a model for D1 is developed that accommodates both sedimentation rate perspectives (Penman & Rooney, 2019).…”
Section: Interpretation: Redox Reactionsmentioning
confidence: 99%
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