NDLI: Annotations to the Devonian Correlation Table, B122di97, R120di97: Brachiopod Stratigraphy and Formations in the Dra Plain (southern Anti-Atlas, Morocco)

Content Provider	Springer Nature Link
Author	Jansen, Ulrich
Copyright Year	1998
Abstract	Die Devon-Korrelationstabelle wird um Spalten zur Brachiopoden-Stratigraphie und Lithostratigraphie des Unter-Devon in der Dra-Ebene (südlicher Anti-Atlas, Marokko) erweitert. Die Grundlage für die dargestellte Gliederung bilden im wesentlichen Profil-Aufnahmen und horizontierte Aufsammlungen im Anti-Atlas mit anschließender systematisch-paläontologischer Bearbeitung der Brachiopoden, die vom Verfasser im Rahmen einer Dissertation durchgeführt wurde (Jansen 1997). Die Brachiopoden-Stratigraphie baut nicht nur auf die genannten Taxa auf, sondern ist das Gesamt-Ergebnis der Betrachtung ganzer Faunen, aus denen bestimmte Taxa ausgewählt und in ihrem jeweiligen evolutiven Zusammenhang beurteilt wurden. Diese Zusammenhänge können nicht hier im einzelnen diskutiert werden; eine entsprechende Veröffentlichung soll 1998 erscheinen (in den „Abhandlungen der Senckenbergischen naturforschenden Gesellschaft“). Den Korrelationen mit anderen Brachiopoden-Gliederungen (Mittmeyer, Carls, Struve, G. Fuchs) liegen weitgehend direkte Material-Vergleiche zugrunde. Die Brachiopoden-Schritte und, daran geknüpft, die Formationen wurden im Sinne der rheinischen Gliederung eingestuft.Die hier veröffentlichten Datierungen unterscheiden sich deutlich von den meisten bisherigen (Hollard 1963a, 1965, 1967, 1981;Drot 1964), indem die Formationen tiefer als bisher eingestuft werden. Erste Verbesserungen nahmen bereitsHollard (1978) undBultynck & Hollard (1980) vor.The Devonian correlation table is supplemented by a Lower Devonian brachiopod stratigraphy and a lithostratigraphy of the Dra Plains (southern Anti-Atlas Mountains, Morocco). The new subdivisions are based on sections and horizontal collections in the Anti-Atlas Mountains, followed by a systematic work on the brachiopods by the author within the scope of a thesis (Jansen 1997). The brachiopod stratigraphy derived not only from the mentioned taxa, it is rather more the result of a comprehensive study of faunas; in each fauna several species were selected and regarded with respect to their phylogenetic development. The results of these studies cannot be discussed in detail here; they will be published in 1998 (in „Abhandlungen der Senckenbergischen naturforschenden Gesellschaft“).The correlations with other brachiopod stratigraphies (Mittmeyer, Carls, Struve, G.Fuchs) are based on direct comparisons of materials mostly. Brachiopod stages and formations are dated in terms of the rhenish brachiopod biostratigraphy. The results published here differ from older data (Hollard 1963a, 1965, 1967, 1981;Drot 1964) — the formations are now regarded to be older. First improvements in this sence were already made byHollard (1978) andBultynck & Hollard (1980).
Starting Page	269
Ending Page	272
Page Count	4
File Format	PDF
ISSN	00372110
Journal	Palaeobiodiversity and Palaeoenvironments
Volume Number	77
Issue Number	1-2
Language	English
Publisher	Springer-Verlag
Publisher Date	1998-01-01
Publisher Place	Berlin, Heidelberg
Access Restriction	Subscribed
Subject Keyword	Paleontology Biodiversity Animal Systematics/Taxonomy/Biogeography Plant Systematics/Taxonomy/Biogeography Freshwater & Marine Ecology
Content Type	Text
Resource Type	Article
Subject	Paleontology

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