Tectonic history of the South Tannuol Fault Zone (Tuva region of the northern Central Asian Orogenic Belt, Russia) : constraints from multi-method geochronology [PDF]
, 2020 In this study, we present zircon U/Pb, plagioclase and K-feldspar Ar-40/Ar-39 and apatite fission track (AFT) data along the South Tannuol Fault Zone (STFZ).
De Grave, Johan +6 more
core +1 more source
Scientific Reports, 2022 The Early Ordovician is a key interval for our understanding of the evolution of life on Earth as it lays at the transition between the Cambrian Explosion and the Ordovician Radiation and because the fossil record of the late Cambrian is scarce.
Farid Saleh +12 more
doaj +1 more source
Rifting and arc-related early Paleozoic volcanism along the North Gondwana margin: geochemical and geological evidence from Sardinia (Italy) [PDF]
, 2012 Three series of volcanic rocks accumulated during the Cambrian to Silurian in the metasediment-dominated Variscan basement of Sardinia. They provide a record of the changing geodynamic setting of the North Gondwana margin between Upper Cambrian and ...
BUZZI L +3 more
core +1 more source
Ordovician stratigraphy of the Junee–Narromine Volcanic Belt in central New South Wales, Australia: conodont studies and regional correlations [PDF]
Estonian Journal of Earth Sciences, 2023 This contribution reviews the newly revised biostratigraphy of MiddleâUpper Ordovician marine shelf successions from the JuneeâNarromine Volcanic Belt in central New South Wales, based on conodont studies from four areas covering the northern ...
Yong Yi Zhen, Ian G. Percival
doaj +1 more source
Parasite-induced shell damage in brachiopod Porambonites (Porambonites) laticaudata from the Late Ordovician (Sandbian) of Estonia [PDF]
Estonian Journal of Earth Sciences, 2023 A new type of shell damage has been described in Ordovician brachiopods in Porambonites (Porambonites) laticaudata. There is a pair of small pits with somewhat different outline in the shell surface at the anterior commissure of the brachiopod.
Olev Vinn +3 more
doaj +1 more source
Spechts Ferry (Middle Ordovician) bryozoan fauna from Illinois, Wisconsin, and Iowa. [PDF]
, 1962 Information circular / Illinois State Geological
Perry, Thomas G. (Thomas Gregory), 1918-
core +2 more sources
First report of the mitrate Mitrocystella (Echinodermata, Stylophora) in the Middle Ordovician of the Crozon Peninsula, Brittany (France) [PDF]
Estonian Journal of Earth Sciences, 2023 The mid-Ordovician mitrocystitid mitrate Mitrocystella incipiens was one of the most widespread stylophorans in the high latitude Mediterranean Province, with occurrences in the Armorican Massif (France), the Iberian Peninsula (Portugal and Spain) and ...
Maxime Renaud +6 more
doaj +1 more source
A new marrellomorph euarthropod from the Early Ordovician of Argentina [PDF]
, 2016 Marrellomorphs (class Marrellomorpha) are a group of Paleozoic arthropods with a very poor fossil record. Here we describe a new marrellomorph arthropod Mimetaster florestaensis sp. nov. from the Tremadocian (earliest Ordovician) of Argentina.
Aris, María Josefina +3 more
core +1 more source
Integration of Darriwilian (Middle Ordovician) δ13Corg chemostratigraphy with graptolite biostratigraphy in the classical Röstånga area in northwestern Scania (southern Sweden) [PDF]
Estonian Journal of Earth Sciences, 2020 The largely covered Middle Ordovician succession in the classic geological Röstånga area in northwestern Scania has not been studied for some 80 years.
Stig M. Bergström +4 more
doaj +1 more source
Solutan echinoderms from the Lower Ordovician of the Montagne Noire (France): new data and palaeobiogeographic implications [PDF]
Estonian Journal of Earth Sciences, 2023 Solutans are relatively common members of echinoderm assemblages in the Saint-Chinian Formation (upper Tremadocian) of the Montagne Noire (France). The revision of all available material confirms that most specimens can be assigned to Minervaecystis ...
Christophe Dupichaud +2 more
doaj +1 more source