Results 91 to 100 of about 1,613 (196)

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

, 2023
Published
openaire   +3 more sources

A palynological investigation of samples from the Devonian of SW England [PDF]

, 2006
The results of a palynological investigation aimed at determining the ages of 17 samples from the Devonian of SW England are reported. A key element in the extraction of determinable spores from these samples was successful oxidation of the material ...
Molyneux, S.G.
core  

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

Graptolitos del Tremadociense (Ordovícico Inferior) de la formación Volcancito, Sistema de Famatina (La Rioja, Argentina) [PDF]

, 2005
El Miembro Peña Negra de la Formación Volcancito(Tremadociense) del Sistema de Famatina (noroeste argentino) consta de pizarras negras graptolíticas, que se investigaron paleontológicamente, capa a capa, a lo largo de 400 m de sucesión en las secciones
Esteban, Susana B., Gutiérrez Marco, Juan Carlos   +1 more
core   +1 more source

An effective palynological preparation procedure using hydrogen peroxide [PDF]

, 2007
Most pre-Quaternary palynology samples are currently prepared by demineralization of the sediment/sedimentary rock matrix using hydrochloric and hydrofluoric acids (HCl and HF respectively).
Kyffin-Hughes, Jane E., Owens, Bernard, Riding, James   +2 more
core   +2 more sources

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

Schmidtites celatus (Obolida, Brachiopoda) from the "Obolus sands" (Upper Cambrian - Lower Ordovician) of Estonia

, 2006
International audienceLarge collections of the brachiopod obolid Schmidtites celatus have been gathered from Upper Cambrian-Lower Ordovician strata in four northern Estonian localities. The morphological features and the taxonomic characters of the genus
Emig, Christian C.
core   +3 more sources

GRAIN SIZE ANALYSIS AND MINERALOGY OF THE TREMADOCIAN DICTYONEMA SHALE IN ESTONIA [PDF]

Oil Shale, 2022
Aadu Loog, Tiia Kurvits, J. Aruväli, Valter Petersell   +3 more
doaj   +1 more source

New late Tremadocian (Early Ordovician) conodont and graptolite records from the southern South American Gondwana margin (Eastern Cordillera, Argentina)

Geologica Acta, 2009
New late Tremadocian (Early Ordovician) conodont and graptolite faunas from the eastern and central belts of the Eastern Cordillera (Jujuy Province, northwestern Argentina) are reported.
G.L. ALBANESI, G. ORTEGA
doaj