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dc.contributor.authorPrave, Anthony Robert
dc.contributor.authorCondon, Daniel J.
dc.contributor.authorHoffmann, Karl Heinz
dc.contributor.authorTapster, Simon
dc.contributor.authorFallick, Anthony Edward
dc.identifier.citationPrave , A R , Condon , D J , Hoffmann , K H , Tapster , S & Fallick , A E 2016 , ' Duration and nature of the end-Cryogenian (Marinoan) glaciation ' Geology , vol. 44 , no. 8 , pp. 631-634 .
dc.identifier.otherPURE: 243472995
dc.identifier.otherPURE UUID: 57e519fa-5159-436a-9987-77a933de155a
dc.identifier.otherScopus: 84980327271
dc.identifier.otherWOS: 000380121500010
dc.descriptionThis work was supported by NERC Isotope Geoscience Facility Steering Committee grant IP-1462-0514.en
dc.description.abstractThe end-Cryogenian glaciation (Marinoan) is portrayed commonly as the archetype of snowball Earth, yet its duration and character remain uncertain. Here we report U-Pb zircon ages for two ash beds from widely separated localities of the Marinoan-equivalent Ghaub Formation in Namibia: 639.29 ± 0.26 Ma and 635.21 ± 0.59 Ma. These findings verify, for the first time, the key prediction of the snowball Earth hypothesis for the Marinoan glaciation, i.e., longevity, with a duration of ≥4 m.y. They also show that the nonglacial interlude of Cryogenian time spanned 20 m.y. or less and that glacigenic erosion and sedimentation, and at least intermittent open-water conditions, occurred 4 m.y. prior to termination of the Marinoan glaciation.
dc.rights© 2016 Geological Society of America. This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at
dc.subjectGE Environmental Sciencesen
dc.titleDuration and nature of the end-Cryogenian (Marinoan) glaciationen
dc.typeJournal articleen
dc.contributor.institutionUniversity of St Andrews.Earth and Environmental Sciencesen
dc.contributor.institutionUniversity of St Andrews.Marine Alliance for Science & Technology Scotlanden
dc.contributor.institutionUniversity of St Andrews.Scottish Oceans Instituteen
dc.contributor.institutionUniversity of St Andrews.St Andrews Sustainability Instituteen
dc.contributor.institutionUniversity of St Andrews.St Andrews Isotope Geochemistryen
dc.contributor.institutionUniversity of St Andrews.School of Geography and Geosciencesen
dc.description.statusPeer revieweden

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