Results 161 to 170 of about 1,497,171 (212)

Dating ductile deformation of the Earth’s crust: the critical role of fluids

Jakobsson V, Spikings R, Kutzschbach M, Berger A, Kouzmanov K, Müller W.   +5 more
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Upper Ordovician Phacopida (Trilobita) From Tasmania

Alcheringa, 1999
Eastonian trilobite faunas of the Gordon Group in Tasmania include the new species Ceraurinella oepiki, Erratencrinurus trippi, and Pliomerina trisulcata, as well as a reedocalymeninid probably allied to Sarrabesia Hammann & Leone, 1997. Ceraurinella and Erratencrinurus have not previously been reported from Australia, the former being predominantly ...
Gregory D. Edgecombe, Maxwell R Banks
exaly   +2 more sources

Upper Ordovician of Central Texas

AAPG Bulletin, 1953
ABSTRACT Discovery of Upper Ordovician strata in the Llano uplift of central Texas is here reported. These rocks, named the Burnam limestone, are considered to be correlative with some part of the Richmond group, because of the presence in them of Halysites (Catenipora), Streptelasma rusticum, Austinella, Mcewanella raymondi ...
Virgil E. Barnes, Preston E. Cloud, Helen Duncan   +2 more
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Kope Formation (Upper Ordovician): Ohio and Kentucky

Science, 1964
Eden-like strata near Maysville, Kentucky, may be correlated with the Eden and lower Fairview formations of Cincinnati. To avoid the name Eden, which has stadial connotation, these rocks are included in the Kope formation, defined as medium-bedded limy shales (mean clastic ratio, 2.5 to 3.8) resting conformably between shaly Point Pleasant limestones ...
M P, Weiss, W C, Sweet
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Crinoids from the Upper Ashgill (Upper Ordovician) of Wales

Journal of Paleontology, 1993
A collection of small crinoids and crinoid debris from the Ashgill (Rawtheyan?) of Cnwce, near St. Clears, Dyfed, southwest Wales includes numerous crowns ofAithriocrinus strahanin. gen. and sp. incertae familiae, an indeterminate 10–armed camerate(?) and an indeterminate multiple-armed camerate.Aithriocrinus strahaniwas previously considered to be a ...
Stephen K. Donovan, Cornelis J. Veltkamp
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The American Upper Ordovician Standard: XIII A Revised Time-Stratigraphic Classification of North American Upper Middle and Upper Ordovician Rocks

Geological Society of America Bulletin, 1971
Correlations, based on conodonts, between the Lexington, Kope and Clays Ferry Formations of the Cincinnati Region (Ohio, Kentucky, Indiana) and formations of the Trenton Group of New York and Ontario indicate that the base of the typical Edenian Stage and the top of the typical Shermanian Stage are at essentially the same biostratigraphic level. Hence,
W. C. SWEET, S. M. BERGSTRÖM
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Upper Ordovician sequences of western Estonia

Palaeogeography, Palaeoclimatology, Palaeoecology, 2004
Abstract The Upper Ordovician (uppermost Caradoc-Ashgill) section of western Estonia consists of a series of seven open-shelf carbonate sequences. Depositional facies grade laterally through a series of shelf-to-basin facies belts: grain-supported facies (shallow shelf), mixed facies (middle shelf), mud-supported facies (deep shelf and slope) and ...
Mark T Harris, Peter M Sheehan, Leho Ainsaar, Linda Hints, Peep Männik, Jaak Nõlvak, Madis Rubel   +6 more
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Upper Ordovician bryozoans of Morocco

Geological Society, London, Special Publications, 2019
Abstract The majority of Upper Ordovician bryozoan occurrences in Morocco are known from the Anti-Atlas. These faunas are abundant and diverse; however, many of them still remain unstudied. The few explored bryozoan faunas of the Katian age exhibit high abundance and diversity of erect branched and massive trepostomes accompanied by few ...
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Upper Ordovician Shales in Central Kansas

AAPG Bulletin, 1947
ABSTRACT Shales approximately equivalent in age to Maquoketa beds in Iowa and to Sylvan strata in Oklahoma form the topmost Ordovician over much of central Kansas. They normally consist of two members: (1) an upper dolomitic gray shale, which is siliceous and cherty in some areas, and (2) a lower soft flaky shale.
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