Results 31 to 40 of about 8,458 (202)

Magnetostratigraphy of the Lower Triassic beds from Chaohu(China) and its implications for the Induan–Olenekian stage boundary. [PDF]

open access: yes, 2009
A magnetostratigraphic study was performed on the lower 44 m of the West Pingdingshan section near Chaohu city, (Anhui province, China) in order to provide a magnetic polarity scale for the early Triassic.
Sun, Zhiming   +5 more
core   +2 more sources

Subalkalic and calc-alcalic Early-Eifelian volcanicity and related pyrite-pollymetallic mineralization in the Magnitogorsk Megazone, the Southern Urals

open access: yesЛитосфера, 2017
Until now, there is a problem of the stratigraphic position and the serial petrogenetic affiliation of the Dzhusinsky volcanic complex and the correlation of the section of the Dzhusa-Dombarovka pyrite-palevolcanic belt of the East Magnitogorsk zone (EMZ)
M. Kosarev Alexandr   +2 more
doaj   +1 more source

UPPER CARBONIFEROUS (PENNSYLVANIAN) CONODONTS FROM SOUTH GUIZHOU OF CHINA

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2003
This paper describes in detail che conodont sequence of che Upper Carboniferous (Pennsylvanian) and the upper and lower boundaries in this interval at the Nashui section in Luodian, South Guizhou. The following 23 conodont zones, in descending order, can
WANG ZHIHAO, QI YUPING
doaj   +1 more source

The role of sea-level change and marine anoxia in the Frasnian-Famennian (Late Devonian) mass extinction [PDF]

open access: yes, 2008
Johnson et al. (Johnson, J.G., Klapper, G., Sandberg, C.A., 1985. Devonian eustatic fluctuations in Euramerica. Geological Society of America Bulletin 96, 567–587) proposed one of the first explicit links between marine anoxia, transgression and mass ...
Algeo   +82 more
core   +1 more source

First insights into the Devonian–Carboniferous boundary conodonts from the depression deposits of the Kama-Kinel Trough System, East European Platform (Volga-Ural petroleum province, Sarailinskaya Depression)

open access: yesУчёные записки Казанского университета: Серия Естественные науки
Conodonts from the Devonian–Carboniferous boundary deposits in two wells within the Sarailinskaya Depression of the Kama-Kinel Trough System were studied.
G. M. Sungatullina   +7 more
doaj   +1 more source

Insight into tube-building behaviour and palaeoecology of some agglutinating worms from the Upper Devonian of Nevada, USA [PDF]

open access: yes, 2015
Agglutinated worm tubes from the Upper Devonian of the Devils Gate section in Nevada, USA are reported for the first time, filling a major gap in their Palaeozoic fossil record.
Bond, David P. G., Zatoń, Michał
core   +1 more source

Middle Darriwilian conodont zones in the uppermost San Juan limestone and the lower member of the Las Aguaditas formation, central Precordillera of San Juan, Argentina [PDF]

open access: yes, 2013
The geological province of Precordillera is located in western Argentina. It extends 450 km meridionally and 110 km from east to west (Fig. 1) (Furque and Cuerda, 1979).
Albanesi, Guillermo Luis   +2 more
core  

High resolution carbon isotope stratigraphy of the basal Silurian stratotype (Dob's Linn, Scotland) and its global correlation [PDF]

open access: yes, 1997
Since its designation as the Global Stratotype Section and Point (GSSP) for the base of the Silurian System, the choice of Dob's Linn, Southern Scotland, has received criticism due to the difficulties of relating its well constrained graptolite ...
Brenchley, P.J.   +3 more
core   +1 more source

Carboniferous conodont biostratigraphy

open access: yesGeological Society, London, Special Publications, 2021
Abstract Carboniferous conodont biostratigraphy comprises regional zonations that reflect the palaeogeographical distribution of taxa and distinct shallow-water and deep-water conodont biofacies. Some species have a global distribution and can effect high quality correlations.
James E. Barrick   +9 more
openaire   +2 more sources

THE FIRST RECORD OF CAMBRIAN CONODONTS FROM THE HUQF-HAUSHI OUTCROPS, OMAN, ARABIAN PENINSULA

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2016
Outcrops of Cambrian sediments of the uppermost Miqrat Formation, the Al Bashair Formation and the basal Barik Formation were sampled for conodont and palynomorph studies.
GABRIELLA BAGNOLI   +2 more
doaj   +1 more source

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