Late Cretaceous alkaline saline lake complexes of the Kalahari Group in northern Botswana

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dc.contributor.authorDu Plessis P.I.
dc.contributor.authorLe Roux J.P.
dc.date.accessioned2011-05-15T15:59:21Z
dc.date.available2011-05-15T15:59:21Z
dc.date.issued1995
dc.description.abstractBlock faulting in northern Botswana during the Late Cretaceous created grabens which were subsequently filled in by erosion of the nearby horsts. The resultant sedimentary succession forms the Mmashoro Formation at the base of the Kalahari Group. The graben sub-basins are partly interconnected, with younger sediments overstepping the horsts in response to expanding lacustrine and marginal lacustrine environments. The basal deposits consist of alluvial fan conglomerates eroded from the fault scarps, grading downslope and upward into ephemeral stream floodplain, sandflat and dry mudflat deposits. In some of the grabens sandflat deposits grade into perennial saline lake sandstones and finally layered cherts precipitated from hypersaline brines under increasingly arid conditions. The successions thus constitute classical alkaline saline lake complexes. © 1995.
dc.description.versionArticle
dc.identifier.citationJournal of African Earth Sciences
dc.identifier.citation20
dc.identifier.citation1
dc.identifier.issn8995362
dc.identifier.urihttp://hdl.handle.net/10019.1/11135
dc.subjectalkaline saline lake
dc.subjectCretaceous
dc.subjectgraben
dc.subjectKalahari Group
dc.subjectpalaeogeography
dc.subjectsedimentary succession
dc.subjectBotswana
dc.titleLate Cretaceous alkaline saline lake complexes of the Kalahari Group in northern Botswana
dc.typeArticle
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