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U-Pb zircon age constraints on late Neoproterozoic glaciation in Tasmania

Calver, Clive; Black, Lance; Everard, John L.; Seymour, David B


Two new U-Pb dates (sensitive high-resolution ion microprobe on zircon) have an important bearing on the age of the Marinoan (Elatina) glaciation, a presumed global chronostratigraphic marker that has been previously poorly constrained in terms of its numerical age. In the Grassy Group of King Island, intermediate sills dated as 575 ± 3 Ma intrude an Elatina-equivalent diamictite (the Cottons Breccia), cap carbonate, and postglacial shale. The sills are locally vesicular, stratigraphically...[Show more]

CollectionsANU Research Publications
Date published: 2004
Type: Journal article
Source: Geology
DOI: 10.1130/G20713.1


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