NDLI: Uppermost Famennian stratigraphy and facies development of the Reigern Quarry near Hachen (northern Rhenish Massif, Germany)

Content Provider	Springer Nature Link
Author	Söte, Till Hartenfels, Sven Becker, Ralph Thomas
Copyright Year	2017
Abstract	As a contribution to the ongoing international revision of the Devonian/Carboniferous boundary, we present a bed-by-bed study of the Reigern Quarry in the northern Sauerland (Rhenish Massif, Germany), which is famous as an uppermost Famennian ammonoid locality. Currently exposed are ca. 2.5 m of strongly cyclic Wocklum Limestone, conformably overlain, but with a long hiatus (topmost Famennian to upper Tournaisian), by laminated radiolarites and a thin metabentonite of the Lower Carboniferous Hardt Formation. The nodular limestones are pelagic mud-wackestones with some sporadic occurrences of cephalopod float-rudstones. The exposed part of the Wocklum Limestone falls in the successive Bispathodus ultimus ultimus and Siphonodella (Eosiphonodella) praesulcata (s.l.) zones. It yielded two new Siphonodella (Eosiphonodella) species left in open nomenclature, Neopolygnathus communis aff. dentatus and the possibly stratigraphically relevant Bispathodus ultimus corradinii ssp. nov. The upper range of Palmatolepis gracilis semisigmoidalis is significantly expanded. The conodont faunas mostly belong to variants of the pelagic Palmatolepis-Bispathodus biofacies; but in the lower part of the succession, there is a new Neopolygnathus biofacies that previously has not been recorded from deeper-water, pre-Hangenberg Crisis strata. Neopolygnathus is interpreted as a palaeoecological generalist that variably blossomed in outer or inner shelf facies and after other conodont groups declined. The mostly loose ammonoid faunas comprise almost 30 taxa and fall mostly in the lower Wocklumian Kalloclymenia subarmata and Muessenbiaergia bisulcata zones (Upper Devonian = UD VI-A$_{1}$/A$_{2}$), which agrees with previous ammonoid-conodont correlations.
Starting Page	633
Ending Page	654
Page Count	22
File Format	PDF
ISSN	18671594
Journal	Palaeobiodiversity and Palaeoenvironments
Volume Number	97
Issue Number	3
e-ISSN	18671608
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2017-08-05
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Conodonts Ammonoids Stratigraphy Upper Devonian D/C boundary Rhenish Massif Paleontology Biodiversity Animal Systematics/Taxonomy/Biogeography Plant Systematics/Taxonomy/Biogeography Freshwater & Marine Ecology
Content Type	Text
Resource Type	Article
Subject	Ecology Geology Ecology, Evolution, Behavior and Systematics Global and Planetary Change Paleontology

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