Results 31 to 40 of about 470 (166)

Pollen Organ Telangiopsis sp. of Late Devonian Seed Plant and Associated Vegetative Frond. [PDF]

PLoS ONE, 2016
Pollen organ Telangiopsis sp., associated with but not attached to vegetative fronds, has been collected from the Upper Devonian (Famennian) Wutong Formation, Dongzhi County, Anhui Province, China. Fertile axes with terminal pollen organs are dichotomous
De-Ming Wang, Mei-Cen Meng, Yun Guo
doaj   +1 more source

First record of conulariids from the Tērvete Formation, Upper Devonian of Latvia [PDF]

Estonian Journal of Earth Sciences, 2020
Phosphatized remains belonging to conulariids have been found in the Middle Famennian (Upper Devonian) deposits of the Tērvete Formation of Latvia for the first time.
Ervīns Lukševičs
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, Shunliang Bai, Dayong Jiang   +2 more
openaire   +1 more source

Bioerosion in the Late Devonian placoderm remains from the Holy Cross Mountains, Poland

Acta Palaeontologica Polonica
We report the first occurrence of trace fossils in placoderm bones from the Upper Devonian of the Holy Cross Mountains. A taxonomic analysis of three ichnogenera revealed the earliest evidence of Sulculites (ie., Sulculites bellus), characterised by ...
Patrycja G. Dworczak, Piotr Szrek, Olga Wilk   +2 more
doaj   +1 more source

The oldest shark face—anatomy of the Devonian elasmobranch Phoebodus

Acta Palaeontologica Polonica
Phoebodus was recognized as the earliest elasmobranch known from articulated remains, a group which constitutes most modern cartilaginous fish comprising sharks, skates and rays. Its elongate body, the presence of two dorsal fins with fin spines, and the
Christian Klug, Merle Greif, Alexander Pohle, Michał Ginter, Michael I. Coates, Wahiba Bel Haouz, Abdelouahed Lagnaoui, Jonathan Pople, Linda Frey   +8 more
doaj   +1 more source

Geological structure features of Menzelinsky, Timerovsky and Olginsky fields of the Republic of Tatarstan as a result of their genetic nature

Georesursy, 2018
The Menzelinsky, Timerovsky and Olginsky fields are located in the northeast of the Republic of Tatarstan and are associated with uplifts, sharply pronounced along the Tulskian surface of the Lower Carboniferous.
N.V. Nefyodov, V.B. Karpov, Yu.M. Arefiev,, A.V. Kalmykov, , G.A. Nikiforov   +4 more
doaj   +1 more source

New finds of fishes in the lower uppermost Famennian (Upper Devonian) of Сentral Russia and habitats of the Khovanshchinian vertebrate assemblages [PDF]

Estonian Journal of Earth Sciences, 2018
New vertebrate finds from the Khovanshchinian Regional Stage (lower uppermost Famennian, Upper Devonian) made an important contribution to our knowledge of the composition and distribution of vertebrate assemblages in Central Russia.
Oleg A. Lebedev, Galina V. Zakharenko, Vladimir V. Silantiev, Irina O. Evdokimova   +3 more
doaj   +1 more source

The Ames impact structure, Oklahoma: New radioisotopic constraints and implications for North American impact chronology

Meteoritics &Planetary Science, Volume 61, Issue 8, Page 2103-2139, August 2026.
Abstract The Ames impact structure (Oklahoma) is thought to have formed during the Ordovician Meteor Event, based on conodont biostratigraphy of its crater fill. Here, U–Pb zircon dates from its impact‐melt portion, conducted using secondary ion mass spectrometry and laser ablation–inductively coupled plasma–mass spectrometry (n = 37 spots), yield a ...
Elizabeth J. Catlos, Andrew F. Parisi, Michael E. Brookfield, Timmons Erickson, Sean P.S. Gulick, Axel K. Schmitt, Daniel F. Stockli, Daniel P. Miggins, Ben Ruchte, Mark Cloos   +9 more
wiley   +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, Hathaithip Thassanapak, Mongkol Udchachon   +2 more
doaj   +1 more source

New Famennian colonial coral (Rugosa) from the Holy Cross Mountains (Poland): an example of local evolution after Frasnian-Famennian extinction [PDF]

The Science of Nature, 2016
Colonial rugose corals are extremely rare in the fossil record after the Late Devonian (Frasnian-Famennian) extinction event. Here, we report a new genus and species, Famastraea catenata, from the late Famennian of the western part of the Holy Cross Mountains (Kowala) in Poland. Although this taxon is colonial, it displays many morphological characters
Berkowski, Błażej, Zapalski, Mikołaj K., Wrzołek, Tomasz   +2 more
openaire   +2 more sources