Results 81 to 90 of about 893 (201)

Palaeoecology and palaeogeography of Late Ordovician (Katian–Hirnantian) cephalopods of the Boda Limestone, Siljan district, Sweden

, 2014
The carbonates associated with the Late Ordovician (Katian–Hirnantian) Boda mounds of the Siljan district, Sweden, contain a rich cephalopod fauna.
Jan Ove R. Ebbestad, Kröger, Björn,, Björn Kröger, Ebbestad, Jan Ove R.,   +3 more
core   +1 more source

Limitation of fixed nitrogen and deepening of the carbonate-compensation depth through the Hirnantian at Dob's Linn, Scotland [PDF]

, 2019
This study was funded by University of Washington Department of Earth and Space Sciences Harry Wheeler Scholarship and Jody Bourgeois Graduate Student Support Fund granted to MCK.
Hillier, Stephen, Koehler, Matthew C., Prave, Tony, Stüeken, Eva E.   +3 more
core   +1 more source

Reconstruction of the Hirnantian (Late Ordovician) Palaeotopography in the Upper Yangtze Region

, 2014
Reconstruction of the Hirnantian (Late Ordovician) palaeotopography in South China is important for understanding the distribution pattern of the Hirnantian marine depositional environment.
Wu, Shuang-Ye, Fan, Junxuan, Zhang, Linna, Chen, Qing   +3 more
core  

Brachiopods from the Hirnantian Stage (Ordovician–Silurian) at Percé, Quebec

, 1976
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Lespérance, Pierre Jacques, Sheehan, P M   +1 more
openaire   +2 more sources

Enhanced Continental Weathering Triggered the Anoxia of Seawater and Mass Extinctions During the Late Ordovician

Journal of Marine Science and Engineering
During the Late Ordovician period, changes in climate and mass extinctions were observed; however, the factors influencing these phenomena have not been fully understood.
Pan Tang, Xiangrong Yang, Detian Yan
doaj   +1 more source

Biostratigraphy of Acritarchs and Chitinozoans in Ordovician Strata from the Fazel Abad Area, Southeastern Caspian Sea, Alborz Mountains, Northern Iran: Stratigraphic Implications [PDF]

Journal of Sciences, Islamic Republic of Iran, 2017
Sixty-four surface samples from the Lower Palaeozoic rock units (mainly Lalun,Abastu and Abarsaj formations) near Kholin-Darreh village in the Fazel Abad area,southeastern the Caspian Sea, Northern Iran, were analyzed to determine their agerelationships.
M. Ghavidel-syooki
doaj  

Hirnantian (latest Ordovician) delta C-13 chemostratigraphy in southern Sweden and globally: a refined integration with the graptolite and conodont zone successions

, 2014
The delta C-13(org) chemostratigraphy of the Hirnantian and lower Rhuddanian in the biostratigraphically well-controlled Rostanga-1 drillcore from west-central Scania is used for an improved integration of the Hirnantian Isotope Carbon Excursion (HICE ...
Ahlberg, Per, Bergstroem, Stig M., Schmitz, Birger, Eriksson, Mats, Young, Seth A.   +4 more
core   +1 more source

Abnormal forms of acritarchs (phytoplankton) in the upper Hirnantian (Upper Ordovician) of Anticosti Island, Canada

, 2012
A detailed study of Late Ordovician-early Silurian acritarchs (Palaeozoic phytoplankton) from Anticosti Island (Quebec, Canada) revealed an unusually high abundance of abnormal forms from the upper Hirnantian carbonate strata (uppermost Ordovician) of ...
VECOLI, MARCO, Servais T, Munnecke A, Vandenbroucke TRA, Delabroye A   +4 more
core   +1 more source

New insights on the Hirnantian palynostratigraphy of the rio Ceira section, Buçaco, Portugal

, 2011
The Lower Palaeozoic successions of Portugal are well represented in the Central Iberian Zone (Cll), one of the main tectonostratigraphic domains of the Iberian Massif.
Lopes, Gilda, Vaz, Nuno, Sequeira, A. J. D., Piçarra, J. M., Fernandes, Paulo, Pereira, Zélia   +5 more
openaire   +2 more sources

Cyclic late Katian through Hirnantian glacioeustasy and its controls on the development of the organic-rich shale, South China

, 2019
Suppliments for paper "Cyclic late Katian through Hirnantian glacioeustasy and its controls on the development of the organic-rich shale, South ...
Lu, Y (via Mendeley Data)
core   +1 more source