Results 71 to 80 of about 1,994 (206)

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

open access: yesThe 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   +2 more
openaire   +2 more sources

Frasnian-Famennian magnetic susceptibility of Sinsin section, Belgium

open access: yes, 2017
Frasnian-Famennian magnetic susceptibility of Sinsin section ...
Day, James E   +15 more
core   +1 more source

Sediment‐stressed reefs over the past 420 Myr

open access: yesThe Depositional Record, Volume 12, Issue 1, February 2026.
In order to fully elucidate the relationship between siliciclastic sedimentation and reef development, there needs to be a significant step change in how we record ancient and recent reefs. Only through the collection of constrained quantitative data, we can progress beyond the largely conjectural associations postulated for many ancient reefal systems.
Tanja Unger   +4 more
wiley   +1 more source

Chondrichthyan spines from the Famennian (Upper Devonian) of Russia

open access: yes, 2020
© 2020 Polish Academy of Sciences. All rights reserved. Lebedev, O.A., Ivanov, A.O. and Linkevich, V.V. 2020. Chondrichthyan spines from the Famennian (Upper Devonian) of Russia. Acta Geologica Polonica, 70 (3), 339–362. Warszawa.
Lebedev O.A.   +5 more
core  

Frasnian-Famennian magnetic susceptibility of Section C, western Canada

open access: yes, 2017
Frasnian-Famennian magnetic susceptibility of Section C, western ...
Day, James E   +15 more
core   +1 more source

Late Devonian (Famennian) phacopid trilobites from western Mongolia

open access: yes, 2020
International audienceThe early Famennian phacopid trilobites Feistops mongoliensis gen. nov. sp. nov., Feistops khovdensis gen. nov. sp. nov., ?Feistops sp. A, and ?Houseops olonbulagensis sp. nov.
Königshof, P.   +9 more
core   +1 more source

Iron–Phosphorus–Carbon Coupled Cycling in Lacustrine System of Ordos Basin During the Middle Triassic

open access: yesGeochemistry, Geophysics, Geosystems, Volume 27, Issue 2, February 2026.
Abstract Widespread organic‐rich shales are associated with perturbations in productivity or preservation conditions; however, the major controlling factors, especially the phosphorus (P) and iron (Fe) interactions and their impacts on organic carbon burial in the paleolake ecosystem remain poorly understood.
Bo Wang   +7 more
wiley   +1 more source

Frasnian-Famennian organic carbon isotope data from Canada, Section C

open access: yes, 2017
Frasnian-Famennian organic carbon isotope data from Canada, Section
Day, James E   +15 more
core   +1 more source

CONODONT BIOSTRATIGRAPHY OF UPPER DEVONIAN TEPHRA BEARING DEPOSITS IN THE İSTANBUL-ZONGULDAK TERRANE, NW TURKEY: INSIGHTS ON THE KELLWASSER EVENTS

open access: yesRivista Italiana di Paleontologia e Stratigrafia
New evidence for a biostratigraphic assessment of the limestone succession comprising K‐bentonite levels exposed in the Yılanlı Formation of the Istanbul-Zonguldak Terrane are provided from conodonts at the Gavurpınarı quarry in Bartın area (NW Turkey).
AYŞE ATAKUL-ÖZDEMIR   +4 more
doaj   +1 more source

1.38 Ga Four‐Layer Tuff Marker Horizon in North China black Shales as a Chronostratigraphic Boundary for the Pre‐Ediacaran Geological Timescale

open access: yesGeophysical Research Letters, Volume 52, Issue 17, 16 September 2025.
Abstract Boundaries in the Phanerozoic chronostratigraphic scale are mainly precisely defined and dated, and many correspond to environmental catastrophes induced by the emplacement of LIPs. The pre‐Ediacaran geological timescale is currently subdivided by approximate absolute ages.
Shuan‐Hong Zhang   +7 more
wiley   +1 more source

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