Silurian graptolite biostratigraphy of the Röstånga-1 drill core, Scania:a standard for southern Scandinavia [PDF]
, 2014 The Rostanga-1 core from west-central Scania provides the most complete succession of the Sandbian (Upper Ordovician) through lower Telychian (Silurian, Llandovery) strata of southern Scandinavia. The Hirnantian is identified in the Kallholn Formation by
Ahlberg, Per +4 more
core +2 more sources
Metal enrichment in lithologically complex black shales: a case study from the Tremadocian of NE Estonia [PDF]
Estonian Journal of Earth Sciences, 2021 Significantly elevated U, Mo, Zn and Pb contents characterize the Early Ordovician black shales in the Sillamäe area, NE Estonia. The presence of silty interlayers with sulphidic mineralization and authigenic carbonates suggests unique physicochemical ...
Rutt Hints +4 more
doaj +1 more source
Population structure of graptolite assemblages [PDF]
, 1998 Graptolite rhabdosomes display a diverse suite of morphologies. The range of morphotypes present within most moderate to high diversity assemblages from the Ordovician and Silurian is similar, despite the different taxonomic composition of the faunas at ...
Underwood, Charlie J. +1 more
core +1 more source
Ordovician and Silurian Formations of the Baltic Syneclise (NE Poland): An Organic Geochemistry Approach [PDF]
, 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
Ordovician and Silurian polychaete diversity and biogeography [PDF]
, 2013 Eunicidan polychaetes formed a significant part of Early Palaeozoic marine invertebrate communities, as shown by the abundance and diversity of scolecodonts (polychaete jaws) in the fossil record.
Tonarova, Petra +5 more
core +1 more source
A new species of the problematic organism Webbyites from the Early Ordovician Fezouata Biota of Morocco [PDF]
Estonian Journal of Earth Sciences, 2023 The problematic colonial organism Webbyites has previously been considered to be a hydroid (phylum Cnidaria). In this paper, we describe a new species, Webbyites felix sp. nov., from the Early Ordovician Fezouata Konservat-Lagerstätte of Morocco.
Lucy A. Muir +1 more
doaj +1 more source
Terrane evolution of the paratectonic Caledonides of northern Britain [PDF]
, 2001 A stratigraphically constrained re-evaluation of terrane amalgamation in the Caledonides of northern Britain allows the development of a new orogenic scenario which accounts for many of the outstanding problems in the paratectonic Caledonides and ...
H. A. ARMSTRONG +5 more
core +1 more source
New contributions to the Ordovician biostratigraphy of the Western Precordillera, Argentina [PDF]
Estonian Journal of Earth Sciences, 2023 Upper Ordovician graptolites and conodonts are recorded from the Yerba Loca Formation in two sections, in the El Toro and Las Viudas creeks, from the El Tigre Range in the Western Precordillera of San Juan Province, Argentina. A collection of graptolites
Fernando E. Lopez +3 more
doaj +1 more source
Tremadocian (Ordovician) reclined graptolites from Baishan, North China [PDF]
Estonian Journal of Earth Sciences, 2023 The Erdaopuzi section in the Baishan area of Jilin Province, northeast China, contains abundant late Tremadoc graptolites. However, there are some taxonomic controversies regarding the characters of the hand specimens that are difficult to identify.
Ming Li +3 more
doaj +1 more source
Late Ordovician molluscs of the central and eastern Anti-Atlas, Morocco [PDF]
, 2022 More than 30 species of tergomyan, gastropod, bivalve and cephalopod molluscs are described from the Late Ordovician of central and eastern Anti-Atlas, Morocco.
Polechová, Marika +3 more
core +1 more source