Results 81 to 90 of about 2,731 (208)

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

Geochemistry, 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, Rukai Zhu, Pengcheng Ju, Quanyou Liu, Weiming Xu, Peng Li, Wang Zhang, Xinping Liang   +7 more
wiley   +1 more source

The cephalopod-rich Famennian and Tournaisian of the Aguelmous Syncline (southern Maïder) [PDF]

, 2018
Highlights - Lower Famennian black shales with (primary) pyritic cheiloceratids and large tree logs. - Middle Famennian goniatite shales at Madène el Mrakib. - Anoxic Lower and Upper Annulata Events. - Upper Famennian rich Platyclymenia faunas. - Hypoxic
Becker, Thomas Ralph, Klug, Christian; https://orcid.org/, Aboussalam, Zhor Sar, Hartenfels, Swen, Afhüppe, Lukas   +4 more
core   +2 more sources

Conodont biostratigraphy of the Frasnian-Famennian boundary in the Esfahan and Tabas areas, Central Iran [PDF]

, 2007
The Frasnian-Famennian (F-F) boundary in Central Iran has been investigated on the basis of conodont faunas (34 species and subspecies) from four sections: Chahriseh near Esfahan, and Kal-e-Sardar, Howz-e-Dorah and Ghale-Kalaghu near Tabas.
Gholamalian, H.
core  

Frasnian-Famennian stable isotopes ratios of H-32 drill core, Iowa

, 2017
Frasnian-Famennian stable isotopes ratios of H-32 drill core ...
Day, James E, Zenghui Guo (8021900), Philippe Claeys (6959036), Anne-Christine Da Silva (6959027), David De Vleeschouwer (6959021), Sinnesael, Matthias, Whalen, Michael T, Chen, Daizhao, Daizhao Chen (8021894), De Vleeschouwer, David, Guo, Zenghui, Da Silva, Anne-Christine, Michael T Whalen (6974795), James E Day (8021897), Claeys, Philippe, Matthias Sinnesael (8015945)   +15 more
core   +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

Geophysical 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, Sandra L. Kamo, Richard E. Ernst, Jun‐Ling Pei, Guo‐Hui Hu, Qi‐Qi Zhang, Hafida El Bilali, Yue Zhao   +7 more
wiley   +1 more source

Early representatives of bryozoans from genus Nikiforovella Nekhoroshev, 1948 and their stratigraphical significance for Late Devonian-Early Carboniferous

Литосфера, 2017
The arm of the present paper is to evaluate the significance of species from genus Nikiforovella for stratigraphy of Devonian-Carboniferous boundary from different regions of Eurasia.
Zoya A. Tolokonnikova
doaj   +2 more sources

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

Rivista 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, ASUMAN GÜNAL-TÜRKMENOĞLU, M. CEMAL GÖNCÜOĞLU, ÖMER BOZKAYA, CENGIZ OKUYUCU   +4 more
doaj   +1 more source

The Famennian global conodont zonation

, 2016
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Spalletta, C., Perri, M. C., Over, D. J., CORRADINI, CARLO   +3 more
openaire   +1 more source

Frasnian-Famennian low resolution carbon isotope data from Poland, Kowala section

, 2017
Frasnian-Famennian low resolution carbon isotope data from Poland, Kowala ...
Day, James E, Zenghui Guo (8021900), Philippe Claeys (6959036), Anne-Christine Da Silva (6959027), David De Vleeschouwer (6959021), Sinnesael, Matthias, Whalen, Michael T, Chen, Daizhao, Daizhao Chen (8021894), De Vleeschouwer, David, Guo, Zenghui, Da Silva, Anne-Christine, Michael T Whalen (6974795), James E Day (8021897), Claeys, Philippe, Matthias Sinnesael (8015945)   +15 more
core   +1 more source

Devonian strata of the Southern Timan: paleomagnetic data [PDF]

Нефтегазовая геология: Теория и практика
New 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