Results 141 to 150 of about 230 (171)

AN ASSEMBLAGE OF MICROPLANKTON FROM THE SHINETON SHALES (TREMADOCIAN)

Proceedings of the Yorkshire Geological Society, 1958
Summary A prolific assemblage of microplankton from the Shineton Shales (Tremadocian) is described. It consists almost entirely of hystrichospheres, including several new species of Hystrichosphaeridium, Micrhystridium, Veryhachium, Leiosphaeridia and Diornatosphaera gen. nov.
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Dictyonema from the Tremadocian of Estonia and Norway

Geological Magazine, 1966
AbstractThe Dictyonema species currently named flabelliforme (Eichwald) (as distinct from D. norvegicum Kjerulf) from the Tremadocian of Estonia is described and compared with the lectotype of Kjerulf's D. graptolithinum from Norway, and their synonymy is confirmed.
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The stratigraphy and petrochemistry of the Lough Nafooey Group (Tremadocian), western Ireland

Journal of the Geological Society, 1980
The Lough Nafooey Group is divided into 4 formations. The lowermost Bencorragh Formation consists of spilitic pillowed tholeiites, passing up into the blocky andesite flows, breccias, cherts and basic pillow lavas of the Finny Formation. This is overlain by the Knock Kilbride Formation comprised of spilitized calc-alkali basic to intermediate lavas ...
P. D. Ryan, P. A. Floyd, J. B. Archer
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Tremadocian (Ordovician) biostratigraphy and graptolites at Dayangcha (Baishan, Jilin, NE China)

Palaontologische Zeitschrift, 2004
Based on a systematic study of Tremadocian graptolites from the Early Ordovician Yehli Formation at Dayangcha, Baishan of Jilin, NE China, a revised graptolite zonation is proposed for the Tremadocian rocks in the area. In ascending order, the graptolite zones include theRhabdinopora flabelliformis parabola Zone, theAnisograptus matanensis Zone ...
Yuandong Zhang, Zhang Yuandong
exaly   +2 more sources

The Tremadocian Beds at Flagabro in South-Eastern Scania (Sweden)

Geologiska Föreningen i Stockholm Förhandlingar, 1958
Abstract A drilling core from Flagabro offering a section through the entire Tremadocian of the locality is described. A report is added on the Ceratopyge Beds and the uppermost part of the Dictyonema Schales exposed at the rivulet cast of the Flagabro farmhouse. A section based on the core demonstrates that the Dictyonema Shales of the locality have a
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An unusual onychochilid mollusc from the Ordovician (Tremadocian) Fezouata Formation, Morocco

Geobios, 2015
Pelecyogyra fezouataensis nov. gen., nov. sp. is described from the Lower Ordovician (Tremadocian, A. murrayi Biozone) Fezouata Formation at Oued Beni Zoli (locality Z-F5), in the central Anti-Atlas, Morocco. This is the first Onychochilidae Koken in Koken and Perner, 1925 reported from the Ordovician of Morocco.
Ebbestad, Jan Ove R., Lefebvre, Bertrand
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New Species of the Genus Vulcanisphaera (Acritarcha) from the Tremadocian of England

Micropaleontology, 1976
Four new species of the genus Vulcanisphaera Deunff, 1961, are described from the Shineton Shales Formation, Tremadocian, England. The type species, V. africana Deunff, was previously recorded from the Tremadocian of Africa and Belgium. It is now recorded by the present author in the Tremadocian of England.
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Tremadocian Ceratopyge Limestone identified by means of conodonts, in Jämtland, Sweden

Geologiska Föreningen i Stockholm Förhandlingar, 1991
Abstract A section through the autochthonous Ordovician limestone to the east of Brunfloviken, Jamtland, central Sweden, yielded conodonts from the upper Ceratopyge and Latorp limestones. The Tremadocian Ceratopyge Limestone is represented by a 5 cm thick bed with abundant phosphorite and glauconite.
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Early orthid brachiopods from the Tremadocian (Lower Ordovician) of northwestern Argentina

Journal of Paleontology, 2009
Two brachiopod species of two of the earliest rhynchonelliformean families are described from one of the first studied Ordovician fossiliferous localities of northwestern Argentina. One is a new species of the family Euorthisinidae (Orthida, Plectorthoidea),Notorthisina musculosaVillas and Herrera.
Enrique Villas, Zarela A. Herrera, Gladys C. Ortega   +2 more
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Tremadocian (Lower Ordovician) sea-level changes and biotas on the Avalon microcontinent

Journal of Paleontology, 2011
The Chesley Drive Group, an Upper Cambrian-Lower Ordovician mudstone-dominated unit, is part of the Ediacaran–Ordovician cover sequence on the North American part of the Avalon microcontinent. The upper Chesley Drive Group on McLeod Brook, Cape Breton Island (previously “McLeod Brook Formation”), has two lithofacies-specific Tremadocian biotas.
ED Landing, Richard A. Fortey
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