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facies, stratigraphy, and architecture of Gondwana breakup and drift sequences

dc.contributor.authorGeiger, Markus
dc.date.accessioned2010-10-12T18:55:13Z
dc.date.available2010-10-12T18:55:13Z
dc.date.issued2004
dc.identifier.urihttp://hdl.handle.net/11858/00-1735-0000-0001-3154-2
dc.description.abstractMadagascar; Jurassic; Karoo; Gondwana; Breakup; Rift; Microfauna; Macrofauna; Ammonites; Indian Ocean. - The breakup of Gondwana along the former East African Orogen is widely interpreted to have lasted from the Late Palaeozoic to the Callovian. The present study indicates that the Permian-Triassic or Karoo phase of rifting was not responsible for the separation of East- and West-Gondwana, since that rift system failed in the Late Triassic. Instead the breakup of Gondwana occurred in the Late Liassic. The pre-rift phase in the Morondava Basin is represented by the Karoo deposits, and the syn-rift phase is recorded by Toarcian marine shales, locally overlain by Aalenian sandstones. A major Early Bajocian unconformity is interpreted as the breakup unconformity. The initial post-rift or drift phase is represented by the Bajocian-Bathonian carbonates, marls and sandstones of coastal plain environment and a coastal barrier/lagoon complex. During the Bathonian the siliciclastic shoreface system moved basinward. Callovian-Early Kimmeridgian shales with interbedded iron-oolites represent ...
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.publisherUniv. Bremen
dc.rights.urihttp://e-docs.geo-leo.de/rights
dc.subject.ddc551
dc.subject.gokVAE 500
dc.subject.gokVDB 100
dc.subject.gokVEQ 300
dc.titleSedimentary and stratal patterns in jurassic successions of western Madagascar
dc.title.alternativefacies, stratigraphy, and architecture of Gondwana breakup and drift sequences
dc.typemonograph
dc.subject.gokverbalGeotektonische Entwicklung der Erdkruste {Geologie}
dc.subject.gokverbalGondwana
dc.subject.gokverbalMadagaskar {Geologie}
dc.identifier.doi10.23689/fidgeo-204
dc.identifier.ppn489040578
dc.type.versionpublishedVersion
dc.relation.collectionGeologische Wissenschaften
dc.description.typethesis


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