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View article: An updated correlation of the Silurian strata in Estonia
An updated correlation of the Silurian strata in Estonia Open
The correlation of the Silurian succession of Estonia with the global standard has long been considered reliable. However, new information, particularly on the distribution of microfossils, has changed our understanding of the Silurian str…
View article: Oxygen isotope compositions of conodonts – analytical challenges of in situ SIMS studies
Oxygen isotope compositions of conodonts – analytical challenges of in situ SIMS studies Open
Reliable deep-time environmental and climate reconstructions are needed to understand the drivers of Earthâs system evolution over geological time. Palaeozoic temperature estimates, including reconstructions of the climate change through…
View article: Changes in shelf phosphorus burial during the Hirnantian glaciation and its implications
Changes in shelf phosphorus burial during the Hirnantian glaciation and its implications Open
The Late Ordovician mass extinction occurred during an icehouse interval, accompanied by the glaciation of the supercontinent Gondwana, which was located at the South Pole at that time. As suggested by sequence stratigraphy of near- and fa…
View article: Towards a revised Sandbian conodont biozonation of Baltica
Towards a revised Sandbian conodont biozonation of Baltica Open
One of the key objectives of the studies proposed by the Ordovician Subcommission is the improvement of regional stratigraphy for further advancements in global correlation. The results of this work can be found in numerous updates and rev…
View article: Ordovician climate changes in the northern subtropics: The δ18O record from the Tunguska Basin, Siberia
Ordovician climate changes in the northern subtropics: The δ18O record from the Tunguska Basin, Siberia Open
Oxygen isotopes from bioapatite (conodonts) have been used for several decades to reconstruct the Palaeozoic climate history. During the Ordovician, conodont-based δ18Ophos studies have revealed a general cooling trend throughout the syst…
View article: Boundary between the Porkuni and Juuru regional stages in the Neitla section, Estonia
Boundary between the Porkuni and Juuru regional stages in the Neitla section, Estonia Open
Conodonts and chitinozoans were studied from the Neitla section, which exposes the boundary between the Porkuni and Juuru regional stages. This level, although not proved biostratigraphically, has been traditionally considered to correspon…
View article: Emended Sandbian (Ordovician) conodont biostratigraphy in Baltoscandia and a new species of<i>Amorphognathus</i>
Emended Sandbian (Ordovician) conodont biostratigraphy in Baltoscandia and a new species of<i>Amorphognathus</i> Open
Conodonts are an important biostratigraphic tool for many Phanerozoic stages. Along with graptolites, they define all global Ordovician Stage boundaries. Within the Upper Ordovician interval, a known species of Amorphognathus tvaerensis (B…
View article: The lower boundary of the Haljala Regional Stage (Sandbian, Upper Ordovician) in Estonia; pp. 76–90
The lower boundary of the Haljala Regional Stage (Sandbian, Upper Ordovician) in Estonia; pp. 76–90 Open
Multi-proxy correlation is used to address the boundary of the Kukruse and Haljala regional stages across the Estonian part of the Baltoscandian Ordovician Palaeobasin. New biostratigraphic information on conodonts, chitinozoans and ostrac…
View article: High-resolution assessment of the Valgu event: conodont diversity and &#948;18Ophos during the early Telychian (Silurian) in the Baltic Basin
High-resolution assessment of the Valgu event: conodont diversity and δ18Ophos during the early Telychian (Silurian) in the Baltic Basin Open
<p>The influence of global climate and oceanographic system dynamics over biological patterns throughout Earth&#8217;s history is one of the main concerns in paleobiology. Periods that record changes in biodiversity of various ma…
View article: New data on the problematic mollusc <i>Jinonicella</i> from the early Silurian of east Siberia
New data on the problematic mollusc <i>Jinonicella</i> from the early Silurian of east Siberia Open
Jinonicella kolebabai Pokorný, 1978, a small problematic “mollusc” of unknown origin is described from the early Silurian (early to mid Llandovery) of east Siberia. This is the first record of Jinonicella from Siberia. Previous Silurian re…
View article: Llandovery microfossils and microfacies of the Hýskov section, Prague Basin
Llandovery microfossils and microfacies of the Hýskov section, Prague Basin Open
The lower Silurian strata of the Prague Basin, as well as in many other regions, are primarily represented by black shales, with limited to no record of benthic life. In this paper, we describe an exceptional late Aeronian volcanic-carbona…
View article: Chitinozoans and scolecodonts from the Silurian and Devonian of Japan
Chitinozoans and scolecodonts from the Silurian and Devonian of Japan Open
Silurian and Devonian chitinozoans and scolecodonts are recorded from strata of the Hida‐Gaien Terrane, central Honshu. Silurian chitinozoans include Eisenackitina , Bursachitina , and the species Angochitina elongata . The latter provides…
View article: Glendonite occurrences in the Tremadocian of Baltica: first Early Palaeozoic evidence of massive ikaite precipitation at temperate latitude
Glendonite occurrences in the Tremadocian of Baltica: first Early Palaeozoic evidence of massive ikaite precipitation at temperate latitude Open
The Tremadocian (Early Ordovician) is currently considered a time span of greenhouse conditions with tropical water surface temperature estimates, interpolated from oxygen isotopes, approaching 40°C. In the high-latitude Baltoscandian Basi…
View article: Japan's earliest ostracods
Japan's earliest ostracods Open
Mesozoic, Cenozoic and especially Holocene ostracod faunas have been documented from Japan. Not surprisingly, considering the plate tectonic factors at play, very few ostracod faunas are known from its early Paleozoic successions. Our pilo…
View article: The Ordovician and Silurian conodonts of Japan: Their biostratigraphical and paleobiogeographical significance
The Ordovician and Silurian conodonts of Japan: Their biostratigraphical and paleobiogeographical significance Open
Conodont‐bearing Ordovician and Silurian rocks have a wide geographical distribution in Japan. They are exposed on Honshu, Shikoku, and Kyushu islands. Two recently studied samples from Gionyama, in Kyushu, yield conodont assemblages of Te…
View article: Silurian stratigraphy of Central Iran – an update
Silurian stratigraphy of Central Iran – an update Open
The Silurian biostratigraphy, lithostratigraphy, and facies of Central Iran including the Kashmar (Boghu Mountains), Tabas (Derenjal Mountains, Ozbak-Kuh), Anarak (Pol-e Khavand) and Kerman regions is reviewed and updated. The current stat…
View article: Conodont biostratigraphy of the Oandu Stage (Katian, Upper Ordovician) in NE Estonia; pp. 1–12
Conodont biostratigraphy of the Oandu Stage (Katian, Upper Ordovician) in NE Estonia; pp. 1–12 Open
Conodonts from the type region of the Oandu Stage (Katian, Upper Ordovician) in NE Estonia were studied. Here, the lower boundary of the stage corresponds to a discontinuity surface at the base of the Hirmuse Formation and, in conodont suc…
View article: Upper Sandbian–lower Katian bio- and chemostratigraphy in the Pajevonys-13 core section, Lithuania; pp. 85–97
Upper Sandbian–lower Katian bio- and chemostratigraphy in the Pajevonys-13 core section, Lithuania; pp. 85–97 Open
The succession of five formations (Auleliai, ViluÄiai, Alvitas, Å akiai, JakÅ¡iai) corresponding to the upper Sandbian and lower Katian in southern Lithuania is dated based on new bio- and chemostratigraphical data from the Pajevonys-13 c…
View article: Age of the Kalana Lagerstätte, early Silurian, Estonia; pp. 105–114
Age of the Kalana Lagerstätte, early Silurian, Estonia; pp. 105–114 Open
The Kalana quarry in central Estonia is known for its exceptionally well-preserved non-calcified algal and other fossils. The interval with the fossil Konservat Lagerstätte in the Kalana section has previously been tentatively dated as ea…
View article: The age of silurian regional stages of European North-Eastern Russia
The age of silurian regional stages of European North-Eastern Russia Open
ÂâåäåíèåÍà çàïàäíîì ñêëîíå Ïðèïîëÿðíîãî Óðàëà ìàðøðóòíèíñêèé è óñòüäóðíàþñêèé ãîðèçîíòû âñêðûâàþòñÿ â íåïðåðûâíîé ïîñëåäîâàòåëüíîñòè â áàññåéíå ð.Êîaeûì, â îáíàaeåíèè 217, êîòîðîå ÿâëÿåòñÿ ñòðàòîòèïè÷åñêèì ðàçðåçîì íàçâàííûõ ãîðèçîíòîâ è î…