Results 61 to 70 of about 230 (171)

Late Tremadocian (Early Ordovician) reefs on the Yangtze Platform, South China, and their geobiological implications: a synthesis

Journal of Palaeogeography, 2021
This study provides an overview and discussion of controls on the distribution of organic reefs during the Early Ordovican Period, in the Yangtze Platform, a region of epicontinental sedimentary rocks in South China.
Jian-Po Wang, Qi-Jian Li, Stephen Kershaw, Yuan-Yuan Zhang, Shen-Yang Yu, Yue Li   +5 more
doaj   +1 more source

Some Upper Tremadocian graptolites from Norway

, 1963
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
openaire   +2 more sources

The Lower Ordovician (Tremadocian to Floian) graptolite fauna of Hunneberg, Västergötland, Sweden

, 2023
Published
openaire   +3 more sources

PALYNOLOGICAL STUDY OF PALEOZOIC SEDIMENTS OF THE CHAL-I-SHEH AREA, SOUTHWESTERN IRAN [PDF]

Journal of Sciences, Islamic Republic of Iran, 1993
The Paleozoic sediments of the Chal-i-Sheh area in southwestern Iran comprising of Mila Formation, Ilebek Formation and Faraghan Formation, were studied palynologically. The samples containing well-preserved palynomorphs include acritarchs, chitinozoans,
doaj  

NEW GEOLOGICAL AND STRATIGRAPHICAL DATA AND DISCOVERY OF LOWER ORDOVICIAN ACRITARCHS IN THE SAN VITO SANDSTONE OF THE GENN'ARGIOLAS UNIT (SARRABUS, SOUTHEASTERN SARDINIA)

Rivista Italiana di Paleontologia e Stratigrafia, 2020
The subject of this paper is new geological and stratigraphical data regarding the Paleozoic in the Sarrabus area (Southeastern Sardinia). More particularly Tremadocian (Lower Ordovician) acritarchs have been found in samples taken for microfossils ...
SEBASTIANO BARCA, MYRIAM DEL RIO , PAOLA PITTAU DEMELIA   +2 more
doaj  

PRESENZA Dl TREMADOCIANO AD ACRITARCHI IN UNITA' TETTONICHE ERCINICHE A SUD DEL LAGO Dl MULARGIA (SARDEGNA CENTRALE)

Rivista Italiana di Paleontologia e Stratigrafia, 2020
The activity of the first Hercynian tectonic phase is documented in the Lake Mulargia area (central Sardinia) by the presence of numerous tectonic units.
SEBASTIANO BARCA, MYRIAM DEL RIO, NELLO MINZONI, PAOLA PITTAU DEMELIA   +3 more
doaj  

The COSC-2 drill core and its well-preserved lower Palaeozoic sedimentary succession – an unexpected treasure beneath the Caledonian nappes [PDF]

Estonian Journal of Earth Sciences
The Collisional Orogeny in the Scandinavian Caledonides (COSC) project focuses on processes related to the closure of the Iapetus Ocean, causing the Ordovician–Silurian continent–continent collision between Baltica and Laurentia.
Oliver Lehnert, Bjarne Almqvist, Mark Anderson, Jenny Andersson, Simon Cuthbert, Mikael Calner, Isabel Carter, Riccardo Callegari, Christopher Juhlin, Henning Lorenz, Claudio Madonna, Guido Meinhold, Luca Menegon, Iwona Klonowska, Christophe Pascal, Markus Rast, Nick M. W. Roberts, Jonas B. Ruh, Grzegorz Ziemniak   +18 more
doaj   +1 more source

PYRITE VARIETIES IN ESTONIAN TREMADOCIAN ARGILLITE (DICTYONEMA SHALE) [PDF]

Proceedings of the Estonian Academy of Sciences. Geology, 1992
Toivo Kallaste, Eduard Pukkonen
openaire   +1 more source

Contrasting Early Ordovician assembly patterns highlight the complex initial stages of the Ordovician Radiation. [PDF]

Sci Rep, 2022
Saleh F, Guenser P, Gibert C, Balseiro D, Serra F, Waisfeld BG, Antcliffe JB, Daley AC, Mángano MG, Buatois LA, Ma X, Vizcaïno D, Lefebvre B.   +12 more
europepmc   +1 more source

Ordovician conodonts of the Devendeus Formation at the Angosto de La Quesera (Cordillera Oriental of Salta, Argentina): Taxonomic considerations and biostratigraphic significance

Geologica Acta, 2011
Conodonts recovered from the Devendeus Formation at the Angosto de La Quesera locality (Cordillera Oriental of Salta) in northwestern Argentina include Nogamiconus sp., Problematoconites perforatus, Drepanoistodus sp., Oneotodus sp., Scolopodus filosus ...
J. CARLOROSI, S. HEREDIA, Guillermo F. Aceñolaza   +2 more
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