An expanded stratigraphic record of the Devonian-Carboniferous boundary Hangenberg biogeochemical Event from Southeast Iowa (U.S.A.)
نویسندگان
چکیده
منابع مشابه
Biostratigraphy of Devonian-Carboniferous boundary in Tuyeh-Darvar section, north of Iran
Devonian-Carboniferous boundary is not clear in the Eastern Alborz Mountains. In the current study Tuyeh-Darvar section with about 170 m, thickness is selected. In this investigation, the primary goal is revision of Devonian/Carboniferous Boundary (known as DCB) and the other goal is the redefinition of the DCB as a famous necessity (based on ICS program in 2008 for defining the boundary and to...
متن کاملEnd-Devonian extinction and a bottleneck in the early evolution of modern jawed vertebrates.
The Devonian marks a critical stage in the early evolution of vertebrates: It opens with an unprecedented diversity of fishes and closes with the earliest evidence of limbed tetrapods. However, the latter part of the Devonian has also been characterized as a period of global biotic crisis marked by two large extinction pulses: a "Big Five" mass extinction event at the Frasnian-Famennian stage b...
متن کاملMiddle Devonian-Early Carboniferous Conodont Faunas from the Khoshyeilagh Formation, Alborz Mountains, North Iran
Conodonts of Khoshyeilagh Formation, the most complete section of Devonian rocks in the Alborz Mountains, northern Iran, has been studied, and subspecies of the genera Icriodus, Bipennatus, Polygnathus, Pelekysgnathus, Ancyrodella, Palmatolepis, Bispathodus, Scaphignathus, Clydagnathus, Gnathodus, Scaliognathus and Dollymae have been obtained from the studied section. The faunas indicate an Eif...
متن کاملFirst record of the Devonian lycophyte Leclercqia from South America
A single leafy stem from the Middle or lowermost Upper Devonian Campo Chico Formation, Sierra de Perija, western Venezuela, is the first record of the important Devonian herbaceous lycophyte Leclercqia from South America, usually considered as part of western Gondwana. The seemingly cosmopolitan distribution of this genus is discussed in relation to coeval assemblages and palaeocontinental reco...
متن کاملMicrobial life in the late Paleozoic: new discoveries from the Early Devonian and Carboniferous
Fungal spores from the Lower Devonian Rhynie Chert are known to harbor a wide variety of parasitic and saprotrophic microfungi. However, only a few of these intrusive organisms have been documented in detail. This paper describes a previously unknown microfungus contained in fungal spores from the Rhynie chert; it consists of tenuous branched filaments and terminal, globose, usually apophysate ...
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ژورنال
عنوان ژورنال: Bulletin of Geosciences
سال: 2020
ISSN: 1802-8225,1214-1119
DOI: 10.3140/bull.geosci.1781