Late Ordovician
Late Ordovician Palynomorphs
... Recent work on Late Ordovician chitinozoan assem- blages from Anticosti Island (Canada), the Balto- scandian area and the Anti-Atlas region of Morocco has added substantially to[r] ...
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Evolution, Paleoecology, and Paleobiogeography of the Late Ordovician Brachiopod Fauna of Laurentia
... reported Late Ordovician orthide brachiopod of the family Plectorthidae, is characterized by a gently ventribiconvex shell, generally subelliptical outline, with an anterior commissure ranging from slightly ...
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Miospore assemblages from Late Ordovician (Katian-Hirnantian), Ghelli Formation, Alborz Mountain Range North-eastern Iran: Palaeophytogeographic and palaeoclimatic implications
... Similarity is expressed as: CS = 2v/a+ b where v is the number of species in common between the two compared areas; a and b are respectively the total number of species recorded in each area. This CS was applied for the ...
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Large Carbonate Associated Sulfate isotopic variability between brachiopods, micrite, and other sedimentary components in Late Ordovician strata
... from Late Ordovician limestones Measured texture-specific Carbonate Associated Sulfate (CAS) sulfur isotope ratio A range of 25‰ in CAS between components can explain bulk-rock CAS variation CAS from ...
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The Trentonian (Late Ordovician) brachiopod fauna of Ontario: Evolution through a global warming event
... dominated environment. Increased globosity in H. capax is closely associated with prominent posterior thickening of the shell, to the extent that the dental plates become fused with the posterior shell wall (Amsden 1983; ...
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Late Ordovician (Hirnantian) scolecodont clusters from the Soom Shale Lagerstätte, South Africa
... the two palaeocontinents Baltica and Laurentia. Scolecodonts described from North America (Stau ff er, 1933; Eller, 1942, 1945, 1969; Eriksson & Bergman, 2003) can also show great simi- larities to those from Estonia ...
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Evolution of the Late Ordovician Plaesiomyid Brachiopod Lineage in Laurentia
... the Late Ordovician was a episode of elevated volcanic activity (see Huff et ...Middle Ordovician has been linked to the one of the largest ash fall deposits in area known from the Phanerozoic over ...
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Regional settings of structurally hosted gold mineralization in the Mudgee Gulgong District, N S W
... Timing of Mineralization Similar styles of structurally controlled gold deposits are present in host rocks of the Late Ordovician Burranah Formation, the Late Silurian Dungaree Volcanics[r] ...
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Anticlockwise metamorphic pressure–temperature paths and nappe stacking in the Reisa Nappe Complex in the Scandinavian Caledonides, northern Norway: evidence for weakening of lower continental crust before and during continental collision
... of Late Ordovician– early Silurian fossils at the base of the upper Vaddas metased- iments south of the field area ...are Late Ordovician or younger in age ...same Late ...
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Revision of annulated orthoceridan cephalopods of the Baltoscandic Ordovician
... Estonian Ordovician sedimentary succession shows a total thickness of 70 to 180 m (Meidla & Ainsaar 2004) and is divided in several regional stratigraphic units ...and Late Ordovician Viru and ...
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Petrographic And Geochemical Attributes Of Silurian And Devonian Dolomitized Formations In The Huron Domain, Michigan Basin
... and late Ordovician on surface and subsurface carbonates of Michigan Basin in ...to late Ordovician subtidal carbonates in the Manitoulin area are predominantly limestone characterized by ...
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WARM TO COLD WATER CARBONATE FORMATION DURING THE ORDOVICIAN AND THE JURASSIC: EXAMPLES FROM IRAN, AUSTRALIA, AND ENGLAND
... the Ordovician and the ...the Ordovician and the ...the late Ordovician of Tasmania and Late Jurassic of Iran (Kopet-Dagh Basin-Sarakhs area) corresponding to warm temperatures; whereas ...
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Effect of the Ordovician paleogeography on the (in)stability of the climate
... the Ordovician. Since then, numerous studies widely documented the Ordovician glacial sedimentary record in North Africa ...the Late Ordovician Hirnan- tian (445–443 Ma) (Brenchley et ...the ...
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The Ordovician zone index conodont Amorphognathus ordovicicus Branson & Mehl, 1933 from its type locality and the evolution of the genus Amorphognathus Branson & Mehl, 1933
... first Late Ordovician conodont fauna was described, has made it possible to obtain topotype specimens of the several important conodont species introduced by Branson and Mehl from this ...Upper ...
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Mass concentration of Hirnantian cephalopods from the Siljan District, Sweden; taxonomy, palaeoecology and palaeobiogeographic relationships
... the Ordovician succession is mainly composed of highly condensed limestone (see Ebbestad & Hgstrm 2007a), In the Late Ordovician strata large carbonate mud mounds are developed, namely the ...
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Invasive Species and Evolution
... the Late Devonian Biodiversity Crisis (~375million years ago) and the Late Ordovician Rich- mondian Invasion (~446 million years ago), provide insight into the effect of invasive species on ...
8
Greenawald_unc_0153M_18093.pdf
... the Ordovician Taconic orogeny, the late Devonian-early Mississippian Acadian orogeny, and the late Mississippian-Permian Alleghanian orogeny (Hatcher, 1987; Hatcher, ...the late Cambrian ...
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The geology, genesis and exploration context of the Cadia gold copper porphyry deposits, New South Wales, Australia
... Early Ordovician (Be1-4) Hensleigh Siltstone, which conformably overlie latitic volcanic conglomerates of the Mitchell Formation (Percival et ...latest Late Ordovician / earliest Early ...
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Reconnaisance geological observations on Precambrian and Palaeozoic rocks of the New and Salisbury Rivers, Southern Tasmania
... Late Ordovician carbonates of the Gordon Group are exposed in the New River valley just above the junction with the Salisbury River and up the Salisbury to Vanishing Falls, above which a[r] ...
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The Ordovician ostracodes established by Aurel Krause, Part II
... The material of Sztejn shows that the holotype is a larva but – in comparison with other species – quite a late instar (A-1 or A-2). The ontogeny of species dis- playing a centrodorsal crista (P. acmaea) or a row ...
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