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 +3 more
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Miospore assemblages from Late Ordovician (Katian-Hirnantian), Ghelli Formation, Alborz Mountain Range North-eastern Iran: Palaeophytogeographic and palaeoclimatic implications [PDF]
Journal of Sciences, Islamic Republic of Iran, 2016 Well-preserved miospore assemblages are recorded from the Late Ordovician (Katian-Hirnantian), Ghelli Formation in Pelmis-gorge at the north-eastern Alborz Mountain The palynomorphs were extracted from siliciclastic deposits which are well-dated by using
M. Ghavidel-syooki
doaj
The bivalve Cuneamya from the Late Ordovician of Bohemia [PDF]
Fossil Imprint, 2019 Abstract The bivalve species Cuneamya catilloides from the Late Ordovician of Bohemia, previously assigned to the genus Grammysia, is revised. Cuneamya catilloides is an important element of the Modiolopsis Community Group in the Letná Formation. The genus Grammysia very probably does not occur in the Ordovician of Bohemia and is restricted to the ...
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New Perspectives on Glacial Geomorphology in Earth’s Deep Time Record
Frontiers in Earth Science, 2022 The deep time (pre-Quaternary) glacial record is an important means to understand the growth, development, and recession of the global cryosphere on very long timescales (106–108 Myr).
D. P. Le Heron +11 more
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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 ...
Brenchley +27 more
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Petroleum Exploration and Development, 2022 A giant fault-controlled oilfield has been found in the ultra-deep (greater than 6000 m) Ordovician carbonate strata in the northern Tarim Basin. It is of great significance for hydrocarbon accumulation study and oil exploitation to determine the key oil
Shuai YANG +6 more
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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]
, 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 ...
Friend, C.R.L. +5 more
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Rapid recovery from the Late Ordovician mass extinction [PDF]
Proceedings of the National Academy of Sciences, 2004 Understanding the evolutionary role of mass extinctions requires detailed knowledge of postextinction recoveries. However, most models of recovery hinge on a direct reading of the fossil record, and several recent studies have suggested that the fossil record is especially incomplete for recovery intervals immediately after mass extinctions.
A Z, Krug, M E, Patzkowsky
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Warm-water Dasycladaceae algae from the Late Ordovician of the Parahio Valley, Spiti, India [PDF]
Estonian Journal of Earth Sciences, 2019 Warm-water Dasycladaceae algae Mastopora and Cyclocrinites were for the first time recorded from the Takche Formation (Upper Ordovician–lower Silurian), Parahio Valley, Spiti, India.
Ravi S. Chaubey +5 more
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The appearance of Rosenella (stromatoporoid sponge) in Baltica: new species from the Pirgu Stage (Katian, Upper Ordovician) of Estonia [PDF]
Estonian Journal of Earth SciencesThe Katian Age, part of the Late Ordovician Epoch, was a period of significant stromatoporoid diversification. However, their fossil record is often less continuous, hindering our understanding of their diversity and diversification.
Juwan Jeon, Ursula Toom
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