scholarly journals A new ammonoid fauna from theGattendorfia-Eocanites Genozone of the Anti-Atlas (Early Carboniferous; Morocco)

Fossil Record ◽  
2006 ◽  
Vol 9 (1) ◽  
pp. 87-129 ◽  
Author(s):  
Jürgen Bockwinkel ◽  
Volker Ebbighausen
Keyword(s):  
Early Carboniferous ◽  
Ammonoid Fauna

scholarly journals A new ammonoid fauna from the Gattendorfia-Eocanites Genozone of the Anti-Atlas (Early Carboniferous; Morocco)

Fossil Record ◽  
2006 ◽  
Vol 9 (1) ◽  
pp. 87-129 ◽  
Author(s):  
J. Bockwinkel ◽  
V. Ebbighausen
Keyword(s):  
New Species ◽  
Type Species ◽  
Early Carboniferous ◽  
The State ◽  
Wird Eine ◽  
The South ◽  
South Eastern ◽  
Ammonoid Fauna

From the eastern part of the Tafilalt (Anti-Atlas, Morocco), rich assemblages of ammonoids of the <i>Gattendorfia-Eocanites</i> Genozone are described. The detailed investigation of an outcrop near Mfis in the south-eastern Tafilalt yielded a diverse fauna with 24 species, of which 13 are new. The genus <i>Weyerella</i> n. gen. is newly erected with <i>Weyerella protecta</i> n. sp. as type species. Furthermore, the following new species are described: <i>Paragattendorfia aboussalamae</i> n. sp., <i>Acutimitoceras hollardi</i> n. sp., <i>Acutimitoceras posterum</i> n. sp., <i>Acutimitoceras mfisense</i> n. sp., <i>Acutimitoceras occidentale</i> n. sp., <i>Imitoceras oxydentale</i> n. sp., <i>Kazakhstania nitida</i> n. sp., <i>Zadelsdorfia debouaaensis</i> n. sp., <i>Weyerella minor</i> n. sp., <i>Eocanites simplex</i> n. sp., <i>Eocanites rtbeckeri</i> n. sp., and <i>Eocanites dkorni</i> n. sp. The state of preservation of the ammonoids as limonitic steinkern specimens permits a detailed study of sutures and conch ontogeny. <br><br> Aus dem östlichen Tafilalt (Anti-Atlas, Marokko) wird eine Ammonoideen-reiche Abfolge aus der <i>Gattendorfia-Eocanites</i> Genus-Zone beschrieben. Ein im Detail untersuchtes Profil bei Mfis hat eine individuenreiche und diverse pelagische Fauna mit 24 Arten geliefert, von denen 13 neu sind. Die Gattung <i>Weyerella</i> n. gen. wird mit <i>Weyerellaprotecta</i> n. sp. als Typusart aufgestellt. Weitere neue Arten sind: <i>Paragattendorfiaaboussalamae</i> n. sp., <i>Acutimitocerashollardi</i> n. sp., <i>Acutimitocerasposterum</i> n. sp., <i>Acutimitocerasmfisense</i> n. sp., <i>Acutimitocerasoccidentale</i> n. sp., <i>Imitocerasoxydentale</i> n. sp., <i>Kazakhstanianitida</i> n. sp., <i>Zadelsdorfiadebouaaensis</i> n. sp., <i>Weyerellaminor</i> n. sp., <i>Eocanitessimplex</i> n. sp., <i>Eocanitesrtbeckeri</i> n. sp. und <i>Eocanitesdkorni</i> n. sp. Die in Limonit erhaltenen Steinkerne erlauben eine Detailuntersuchung der Lobenlinien und der Gehäuse-Ontogenie. <br><br> doi:<a href="http://dx.doi.org/10.1002/mmng.200600003" target="_blank">10.1002/mmng.200600003</a>

The first results of isotopic (U-Pb, ID-TIMS) dating of individual zircon grains from dolerite dikes of the Eastern zone of the Urals

LITOSFERA ◽  
2020 ◽  
Vol 20 (2) ◽  
pp. 224-230
Author(s):  
V. N. Smirnov ◽  
K. S. Ivanov ◽  
T. V. Bayanova
Keyword(s):  
Isotope Geochemistry ◽  
Early Carboniferous ◽  
Dynamic Mode ◽  
Middle Urals ◽  
Volcanic Complex ◽  
The Urals ◽  
Electron Multiplier ◽  
The Middle Urals ◽  
Eastern Zone ◽  
First Results

Research subject. The article presents the results of dating two dolerite dikes differing in geochemical features from a section along the Iset river in the area of Smolinskoe settlement (the Eastern zone of the Middle Urals). Materials and methods. The dating was performed by an U-Pb ID-TIMS technique for single zircon grains using an artificial 205Pb/235U tracer in the laboratory of geochronology and isotope geochemistry of the Geological Institute of the Kola Science Centre of the Russian Academy of Sciences. The lead isotopic composition and uranium and lead concentrations were measured using a Finnigan-MAT (RPQ) seven-channel mass spectrometer in dynamic mode using a secondary electron multiplier and RPQ quadrupole in ion counting mode. Results. The dikes were dated 330 ± 3 Ma and 240 ± 2 Ma. Conclusions. The research results indicate different ages of dolerite dikes developed within the Eastern zone of the Middle Urals. The oldest of the two established age levels corresponds to the Early Carboniferous era. This fact, along with the proximity of the dolerites to the petrochemical features of the basaltoids of the Early Carboniferous Beklenischevsky volcanic complex, allows these bodies to be considered as hypabyssal comagmates of these volcanics. The youngest obtained age level – Triassic – indicates that the introduction of some dolerite dikes was associated with the final phases of the trapp formation developed rarely within the eastern outskirts of the Urals and widely further east in the foundation (pre-Jurassic basement) of the West-Siberian Plate.

The mid-Tournaisian (Early Carboniferous) anoxic event in the Laurussian shelf basin (Poland): An integrative approach

2021 ◽  
Vol 566 ◽  
pp. 110236
Author(s):  
Michał Rakociński ◽  
Leszek Marynowski ◽  
Michał Zatoń ◽  
Paweł Filipiak
Keyword(s):  
Early Carboniferous ◽  
Integrative Approach ◽  
Anoxic Event

First Early Carboniferous lungfish (Dipnoi, Ctenodontidae) from central Queensland

1999 ◽  
Vol 23 (3) ◽  
pp. 177-183 ◽  
Author(s):  
Susan Turner ◽  
Anne Kemp ◽  
A. Anne Warren
Keyword(s):  
Early Carboniferous

Late Devonian–early Carboniferous contraction-dominated deformation in Central Armorica (Monts d'Arrée, Brittany, France) and its relationship with the closure of the Rheic Ocean

2008 ◽  
Vol 461 (1-4) ◽  
pp. 343-355 ◽  
Author(s):  
Manuel Sintubin ◽  
Michiel van Noorden ◽  
Isaac Berwouts
Keyword(s):  
Early Carboniferous ◽  
Late Devonian ◽  
Rheic Ocean

Implications for the age of South African Devonian rocks in which Tropidoleptus (Brachiopoda) has been found

1983 ◽  
Vol 120 (1) ◽  
pp. 51-58 ◽  
Author(s):  
A. J. Boucot ◽  
C. H. C. Brunton ◽  
J. N. Theron
Keyword(s):  
South Africa ◽  
North America ◽  
South African ◽  
Early Carboniferous ◽  
Fossil Plants ◽  
Geological Time ◽  
Marine Sedimentation ◽  
History Of ◽  
Near Shore ◽  
First Time

SummaryThe Devonian brachiopod Tropidoleptus is recognized for the first time in South Africa. It is present in the lower part of the Witteberg Group at four widely separated localities. Data regarding the stratigraphical range of the genus elsewhere, combined with information on recently described fossil plants and vertebrates from underlying strata of the upper Bokkeveld Group, suggest that a Frasnian or even Givetian age is reasonable for the lower part of the Witteberg Group. The recognition of Tropidoleptus in a shallow water, near-shore, molluscan association, at the top of the South African marine Devonian sequence, is similar to its occurrence in Bolivia, and suggests a common Malvinokaffric Realm history of shallowing, prior to later Devonian or early Carboniferous non-marine sedimentation. It is noteworthy that Tropidoleptus is now known to occur in ecologically suitable environments around the Atlantic, but is absent from these same environments in Asia and Australia. Tropidoleptus is an excellent example of dispersal in geological time — first appearing in northern Europe and Nova Scotia, then elsewhere in eastern North America and North Africa, followed by South America and South Africa, while continuing in North America.

Ferrolysis in Arundian alluvial palaeosols: evidence of a shift in the early Carboniferous monsoonal system

1991 ◽  
Vol 148 (1) ◽  
pp. 9-12 ◽  
Author(s):  
V. P. WRIGHT ◽  
S. D. VANSTONE ◽  
D. ROBINSON
Keyword(s):  
Early Carboniferous

Early Carboniferous Bivalvia from western Argentina

1994 ◽  
Vol 18 (1-2) ◽  
pp. 169-185 ◽  
Author(s):  
CARLOS R. GONZÁLEZ
Keyword(s):  
Early Carboniferous

A new genus of monolete land plant spores from the Ballagan Formation (Tournaisian, Early Carboniferous) of Scotland

2003 ◽  
Vol 126 (3-4) ◽  
pp. 153-162 ◽  
Author(s):  
Duncan McLean ◽  
Roger Neves
Keyword(s):  
New Genus ◽  
Early Carboniferous ◽  
Land Plant
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