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2290388 
Journal Article 
The Great Oxidation and a Siderian snowball Earth: MIF-S based correlation of Paleoproterozoic glacial epochs 
Hoffman, PF 
2013 
Yes 
Chemical Geology
ISSN: 0009-2541 
362 
143-156 
WOS:000327764300015 
Existing correlation schemes between early Paleoproterozoic successions divorce the low-latitude Makganyene glaciation in southern Africa from the Great Oxidation (GO), as recorded by the disappearance of mass-independent fractionation of S-isotopes (MIF-S) in sedimentary sulfide and sulfate minerals. They also suggest a younger age for the GO in southern Africa (similar to 2.3 Ga) compared with North America (similar to 2.4 Ga), which is physically implausible. A new correlation scheme is proposed in which the Makganyene glaciation is temporally linked to the GO and to the second of three Huronian glaciations in North America, the onewith postglacial cap-carbonate. In the new scheme, only three glacial epochs are needed globally, all three are represented in southern Africa, and the second was a circa 2.40 Ga snowball Earth coincident with the GO. (C) 2013 Elsevier B. V. All rights reserved. 
Oxygen; Atmosphere; Great oxidation; Glaciation; Snowball Earth; Paleoproterozoic