Results 31 to 40 of about 12,768 (231)

Early Silurian crinoid diversification on Baltica: Euspirocrinus varbolaensis sp. nov. [PDF]

open access: yesEstonian Journal of Earth Sciences
This article describes the crinoid Euspirocrinus varbolaensis sp. nov. from the early Silurian (Rhuddanian) of northern Estonia. Discovered within the lower Rhuddanian strata in the Reinu quarry, Rapla Parish, this is the second Rhuddanian species of ...
William I. Ausich   +2 more
doaj   +1 more source

Filling the Silurian gap of solutan echinoderms with the description of new species of Dehmicystis from Spain

open access: yesActa Palaeontologica Polonica, 2023
Solutans were among the most enigmatic pre-radial and asymmetric echinoderms. A new species Dehmicystis ariasi sp. nov. is described from the upper part of the Llagarinos Formation, lower Ludlow (Silurian) of Northwest Spain.
SAMUEL ZAMORA   +1 more
doaj   +1 more source

Characterization of Upper Wenlock and Lower Ludlow strata in the Silurian reference section of the Chernov Uplift (Timan-Pechora petroleum province) [PDF]

open access: yesНефтегазовая геология: Теория и практика, 2023
The features of the Upper Wenlock and Lower Ludlow boundary strata in the Silurian reference section located in the central part of the Chernov Uplift in the Arctic zone of the European Northeast of Russia are characterized.
Matveev V.A., Beznosova T.M.
doaj  

A Silurian ‘marrellomorph’ arthropod [PDF]

open access: yesProceedings of the Royal Society B: Biological Sciences, 2007
Xylokorys chledophilia, a new arthropod with three-dimensionally preserved soft tissues, is described from the Herefordshire (Silurian) Lagerstätte of England. The head and trunk are covered by a relatively featureless ovoid carapace, which comprises a domed central part and a flange-like border. The head bears five pairs of appendages.
Siveter, D   +4 more
openaire   +3 more sources

Ordovician and Silurian Formations of the Baltic Syneclise (NE Poland): An Organic Geochemistry Approach [PDF]

open access: yes, 2022
The Baltic Syneclise is one of the Paleozoic basins along the western margin of the East European Craton. Commercial amounts of hydrocarbons have been found onshore and offshore in the Middle Cambrian sandstones and Upper Ordovician limestone reefs.
P. Kosakowski   +2 more
core   +1 more source

A three-dimensionally preserved lobopodian from the Herefordshire (Silurian) Lagerstätte, UK [PDF]

open access: yesRoyal Society Open Science, 2018
The Herefordshire (Silurian) Lagerstätte (approx. 430 Myr BP) has yielded, among many exceptionally preserved invertebrates, a wide range of new genera belonging to crown-group Panarthropoda.
Derek J. Siveter   +4 more
doaj   +1 more source

Silurian hydrocarbon exploration breakthrough and its implications in the Shajingzi structural belt of Tarim Basin, NW China

open access: yesPetroleum Exploration and Development, 2022
The Silurian hydrocarbon exploration in the northwest Tarim Basin had long been fruitless, till Well XSD1 drilled in 2018 in the Shajingzi structural belt, northwest Tarim Basin tapped industrial gas flow from the Silurian for the first time.
Junfeng ZHANG   +2 more
doaj   +1 more source

U-Pn geochronology of deformed metagranites in central Sutherland, Scotland: evidence for widespread late Silurian metamorphism and ductile deformation of the Moine Supergroup during the Caledonian orogeny [PDF]

open access: yes, 2003
Within the Caledonides of central Sutherland, Scotland, the Neoproterozoic metasedimentary rocks of the Moine Supergroup record NW-directed D2 ductile thrusting and nappe assembly, accompanied by widespread tight-to-isoclinal folding and amphibolite ...
Kinny, P.D.   +10 more
core   +1 more source

The position of graptolites within Lower Palaeozoic planktic ecosystems. [PDF]

open access: yes, 1993
An integrated approach has been used to assess the palaeoecology of graptolites both as a discrete group and also as a part of the biota present within Ordovician and Silurian planktic realms.
Underwood, Charlie J.   +1 more
core   +1 more source

A new species of middle Rhuddanian Halysites (Tabulata) from Meitan, northern Guizhou, Southwest China [PDF]

open access: yesEstonian Journal of Earth Sciences, 2015
A new halysitid species, Halysites gaojiangensis, is systematically described from the middle Rhuddanian (Llandovery, Silurian) Wulipo Bed at Gaojiang, Meitan County, northern Guizhou Province, Southwest China.
Guangxu Wang, Renbin Zhan
doaj   +1 more source

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