Results 61 to 70 of about 460 (165)
Geochemistry, Geophysics, Geosystems, Volume 26, Issue 6, June 2025.Abstract In the French Armorican Massif, the Bretonian phase of the Variscan orogeny has been defined by the Late Devonian (Famennian‐Frasnian) erosion gap, and the Early Carboniferous (Tournaisian) syntectonic terrigenous deposits of the l’Huisserie formation in the Laval basin in the Central‐North Armorican Domain, ascribed to the Armorica ...
Wei Lin, Michel Faure, Lingtong Meng
wiley +1 more source
Sedimentology, Volume 72, Issue 2, Page 569-586, February 2025.ABSTRACT In the Pennyseorach Subbasin of south‐west Scotland, the Famennian Kinnesswood Formation of the Inverclyde Group includes several, ca 1 to 3 m thick erosional remnants of host‐replacing phreatic calcrete hardpans developed in mud deposits. The latter are most unusual hosts for such calcretes due to their relative impermeability, which would ...
Pierre Jutras
wiley +1 more source
Devonian strata of the Southern Timan: paleomagnetic data [PDF]
Нефтегазовая геология: Теория и практикаNew paleomagnetic determinations are presented based on a reconnaissance collection of rocks of the Frasnian and Famennian stages of the Upper Devonian, selected on the river Ukhta and river Izhma.
Iosifidi A.G., Sal'naya N.V.
doaj
Basin Research, Volume 36, Issue 6, November–December 2024.First detrital zircon provenance study of the Billefjorden Group on Bjørnøya, Svalbard. The East Greenland Caledonides formed a long‐lived source terrain in northeast Greenland. Syn‐sedimentary faulting, drainage shifts and changing fluvial styles have little influence on detrital zircon age spectrum.
Julian Janocha +2 more
wiley +1 more source
Известия высших учебных заведений: Геология и разведка, 2019 Three stages, namely Middle Devonian (I), Early Late Devonian (II) and Late Late Devonian (III), are distin-guished in the evolution of antiarchs (Placodermi, Antiarchi) in the Middle-Late Devonian of Northern Eurasia.
S. V. Moloshnikov
doaj +1 more source
Uniformity of the upper Famennian Milankovitch cycle in China
Chinese Science Bulletin, 2000 Research on chemo-biostratigraphy reveals that the periodic fluctuation of Ce/La ratios in carbonate sequence may reflect Milankovitch 100 ka eccentricity cyclicity. The Ce/La curve of the upper Famennian of Huangmao (Guangxi) may be well correlated to that of Muhua (Guizhou) and of Mid-Tarim (Xinjiang).
Weicheng Hao +2 more
openaire +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
THE CAUSE OF BIOMASS EXTINCTION AT THE FRASNIAN-FAMENNIAN BOUNDARY, THE KERMAN PROVINCE SOUTHEASTERN, CENTRAL IRAN [PDF]
Journal of Sciences, Islamic Republic of Iran, 2002 About 35 samples were collected from lower and upper parts of the proposed Frasnianamennian boundary in three sections of Upper Devonian marine sediments of the Kerman province.
doaj
Devonian to Carboniferous continental-scale carbonate turnover in Western Laurentia (North America): upwelling or climate cooling? [PDF]
Facies, 2022 Hedhli M +4 more
europepmc +1 more source