Show simple item record

dc.contributor.authorMacdonald, Francis A.
dc.contributor.authorJones, David S.
dc.contributor.authorSchrag, Daniel
dc.date.accessioned2009-03-02T02:29:22Z
dc.date.issued2009
dc.identifier.citationMacdonald, Francis A., David S. Jones, DS, and Daniel P. Schrag. 2009. Stratigraphic and tectonic implications of a newly discovered glacial diamictite-cap carbonate couplet in southwestern Mongolia. Geology 37: 123-126.en
dc.identifier.issn0091-7613en
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:2640593
dc.description.abstractWe report here the discovery of a new end-Cryogenian glacial diamictite and an overlying basal Ediacaran cap carbonate within the Tsagaan Oloom Formation of southwestern Mongolia. The identifi cation of the Cryogenian-Ediacaran boundary, coupled with new 13C chemostratigraphic profi les, facilitates the integration of the Neoproterozoic stratigraphy of Mongolia with records elsewhere. These correlations indicate that a previously unrecognized, –16‰ Cryogenian 13C anomaly is present in the newly defi ned Tayshir member (informal) of the Tsagaan Oloom Formation. Furthermore, chemostratigraphic and lithostratigraphic relationships suggest an ~35 m.y. depositional hiatus below the phosphorite-bearing Zunne Arts member (informal) of the upper Tsagaan Oloom Formation and that subsidence renewed in the latest Ediacaran–Early Cambrian. We propose that the lower ~1500 m of the Tsagaan Oloom Formation was deposited on a thermally subsiding passive margin after Rodiniaage rifting, whereas the Zunne Arts member and the overlying ~1600 m of Early Cambrian strata were deposited in a foredeep basin that formed as the southern margin of the Dzabkhan terrane was subducted beneath the Khantayshir-Dariv arc.en
dc.description.sponsorshipEarth and Planetary Sciencesen
dc.language.isoen_USen
dc.publisherGeological Society of Americaen
dc.relation.isversionofhttp://dx.doi.org/10.1130/G24797A.1en
dc.relation.hasversionhttp://www.eps.harvard.edu/people/faculty/schrag/research.htmen
dash.licenseMETA_ONLY
dc.titleStratigraphic and tectonic implications of a newly discovered glacial diamictite-cap carbonate couplet in southwestern Mongoliaen
dc.relation.journalGeologyen
dash.depositing.authorSchrag, Daniel
dash.embargo.until10000-01-01
dc.identifier.doi10.1130/G24797A.1*
dash.contributor.affiliatedSchrag, Daniel


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record