Results 21 to 30 of about 325 (174)
The effect of geological biases on our perception of early land plant radiation
Palaeontology, Volume 66, Issue 2, March/April 2023., 2023 Abstract The Silurian–Devonian plant radiation was a critical development in the evolution of early terrestrial ecosystems. Characterizing the diversity dynamics of this radiation has been a focus of numerous studies. However, little is known about the impact of geological bias on our perception of this biodiversification.
Eliott Capel +6 more
wiley +1 more source
Devonian corals of the Vosges Mountains, France [PDF]
Acta Palaeontologica PolonicaThe Saxo-Thuringian Zone of western Europe is a tectonostratigraphic unit that includes Devonian sediments. Usually, the sediments are deep-water siliciclastics and variously affected by regional metamorphism.
Julien Denayer
doaj +1 more source
LATE DEVONIAN CONODONTS FROM THE HOJEDK SECTION, KERMAN PROVINCE, SOUTHEASTERN IRAN
Rivista Italiana di Paleontologia e Stratigrafia, 2008 Conodonts (34 species and subspecies) from the Hojedk section north of Kerman span the late Givetian to early Famennian. The new data suggest that Devonian biostromes in central and eastern Iran were deposited on differing levels, and that the currently ...
HOSSEIN GHOLAMALIAN +1 more
doaj +1 more source
Upper Devonian (Famennian) conodonts from radiolarian cherts, Loei Terrane, Loei Province, Northeast Thailand [PDF]
Research & Knowledge, 2015 Conodonts from radiolarian cherts in the Loei Terrane of Loei Province, Northeast Thailand, include Palmatolepis triangularis, P. minuta minuta, P. minuta wolskae and polygnathids and indicate a Famennian crepida Zone age.
Clive Burrett +2 more
doaj +1 more source
Definition of the Eifelian- Givetian Stage boundary
Episodes, 1995 he boundary for the Eifelian-Givetian Stage Global Stratotype Section and Point (GSSP) in the Middle Devonian has been ratified by the ICS and the IUGS and is placed in a section at Jebel Mech Irdane in the Tafilalt of Morocco. The position of the boundary was selected by the Subcommission on Devonian Stratigraphy in 1992 to coincide with the level at ...
Walliser, Otto Heinrich +4 more
openaire +3 more sources
The Milwaukee Formation (Givetian, Wisconsin): gone but not forgotten
Geological Society, London, Special Publications, 2023 Abstract The Milwaukee Formation, a sequence of Givetian (Middle Devonian) marine strata deposited in what is now southeastern Wisconsin, USA, was recognized as preserving an exceptionally diverse biota of invertebrates, placoderms, and plants, when local cement companies mined the rock for the manufacture of hydraulic cement from 1876 to ...
openaire +1 more source
Geologica Acta, 2022 This is the first report of organic-walled tentaculid remains from Givetian through Frasnian age deposits of the Michigan and Appalachian Basins in western Laurussia.
Kimberly C. Meehan, James T. Boyle
doaj +1 more source
Middle Devonian ichnofossils from Hamar Laghdad (eastern Anti-Atlas, Morocco) [PDF]
Swiss Journal of PalaeontologyThis article provides a description of the invertebrate trace fossils from the Hamar Laghdad region of Tafilalt in Morocco. These ichnoassemblages occur in Middle Devonian marly limestone layers, which are characterised by varying clastic content and ...
Wahiba Bel Haouz +4 more
doaj +3 more sources
Diversity dynamics of silurian-early carboniferous land plants in South china. [PDF]
PLoS ONE, 2013 New megafossil and microfossil data indicate four episodes in the diversification of Silurian-Early Carboniferous land plants of South China, a relatively continuous regional record.
Conghui Xiong +7 more
doaj +1 more source
Givetian (Middle Devonian) cladoxylopsid ‘ferns’ from Orkney, northern Scotland [PDF]
Transactions of the Royal Society of Edinburgh: Earth Sciences, 2006 ABSTRACTTwo large fossil plants are described from the Givetian (Middle Devonian) Eday Flags, South Ronaldsay, Orkney Isles, northern Scotland. Fossils with branches joined to stems of this age are rare. Each specimen comprises a robust and tapering main trunk from which numerous closely spaced branches arise distally.
Berry, Christopher Mark, Hilton, Jason
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