Current studentsExisting staffContact us
 

The glacial succession of Sturtian age in South Australia: the Yudnamutana Subgroup

Simple item page
dc.contributor.authorPreiss, W.
dc.contributor.authorGostin, V.
dc.contributor.authorMcKirdy, D.
dc.contributor.authorAshley, P.
dc.contributor.authorWilliams, G.
dc.contributor.authorSchmidt, P.
dc.contributor.editorE Arnaud, GP Halverson, G Shields-Zhou,
dc.date.issued2011
dc.description.abstract<jats:title>Abstract</jats:title> <jats:p>The record of two Neoproterozoic glaciations in South Australia has been known for about a century. The earlier glaciation, of Sturtian age, is represented by the Yudnamutana Subgroup and is characterized by widespread diamictites with both intrabasinal and extrabasinal clasts, some locally faceted and striated. Associated facies include shallow-water sandstone, bedded and laminated siltstone with lonestones and dropstones, and sedimentary ironstones (mainly ferruginous siltstone and diamictite). Proximal settings adjacent to the Curnamona Province display massive basement-derived conglomerate and gigantic basement megaclasts (up to hundreds of metres across).</jats:p> <jats:p>Sturtian glaciogenic sediments of the Yudnamutana Subgroup unconformably overlie a variety of older rock units, including crystalline basement near basin margins and uppermost Burra Group sediments in the depocentre, and were deposited both in shallow marine shelf environments and in tectonically active rift basins encircling the Curnamona Province, with corresponding increases in total thickness from 100–300 m to more than 5 km.</jats:p> <jats:p> Recent U–Pb zircon SHRIMP dating of a thin volcaniclastic layer indicates that the waning stages of the Sturtian glaciation occurred at <jats:italic>c.</jats:italic> 660 Ma. Unlike the deposits of the younger Elatina glaciation, the Yudnamutana Subgroup has so far not yielded reliable palaeomagnetic data. </jats:p>
dc.description.statementofresponsibilityWolfgang V. Preiss, Victor A. Gostin, David M. McKirdy, Paul M. Ashley, George E. Williams and Phillip W. Schmidt
dc.description.urihttp://trove.nla.gov.au/work/160305506
dc.identifier.citationThe Geological Record of Neoproterozoic Glaciations, 2011 / E Arnaud, GP Halverson, G Shields-Zhou, (ed./s), vol.36, Ch.69, pp.701-712
dc.identifier.doi10.1144/M36.69
dc.identifier.isbn9781862393349
dc.identifier.orcidGostin, V. [0000-0001-5928-7403]
dc.identifier.orcidMcKirdy, D. [0000-0003-1668-434X]
dc.identifier.urihttp://hdl.handle.net/2440/70791
dc.language.isoen
dc.publisherGeological Society of London
dc.publisher.placeUnited Kingdom
dc.relation.ispartofseriesGeological Society Memoir; No. 36
dc.rights© The Geological Society of London 2011
dc.source.urihttps://doi.org/10.1144/m36.69
dc.titleThe glacial succession of Sturtian age in South Australia: the Yudnamutana Subgroup
dc.typeBook chapter
pubs.publication-statusPublished

Files

Collections

Earth and Environmental Sciences publications