Results 181 to 190 of about 6,336 (226)

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
openaire   +2 more sources

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
openaire   +1 more source

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
openaire   +2 more sources

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 ...
openaire   +1 more source

The lithostratigraphy of the upper Ordovician of central Portugal

Journal of the Geological Society, 1988
A lithostratigraphic scheme for the upper Ordovician of central Portugal is described incorporating previously-erected local lithostratigraphic terms and new units. Thirteen formations (10 new), including 11 members (eight new), with one named bed, are arranged into four groups (three new). A description of each unit is given, together with comments on
openaire   +1 more source

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.
openaire   +1 more source

Sedimentology of Upper Ordovician regressive strata in Västergötland

Geologiska Föreningen i Stockholm Förhandlingar, 1980
Abstract The sedimentology of the upper Ashgillian Dalmanitina Beds in the Billingen-Falbygden area in Vastergotland is studied. They exhibit facies of shallow-water type. In contrast, the underlying Ulunda, Jonstorp and Nittsjo formations (‘Tretaspis Shales’) and the overlying Llandoverian Rastrites Shale were formed in notably deeper water.
openaire   +1 more source

Middle and Upper Ordovician stratigraphy of the southernmost Appalachians

1986
Abstract Facies changes in Middle and Upper Ordovician stratigraphy can be seen in a series of exposures on I-59 and Alabama 77 in the vicinity of Gadsen, Alabama (Fig. 1).
Thornton L. Neathery, James A. Drahovzal
openaire   +1 more source

New Upper Ordovician edrioasteroids from Morocco

Geological Society, London, Special Publications, 2018
Abstract Edrioasteroids from the Katian, Lower Ktaoua and Upper Tiouririne formations provide new data on several previously described species and two new species of edrioasteroids. Ontogenetic and palaeoecological data are provided for Moroccopyrgus matacarros .
Colin D. Sumrall, Samuel Zamora
openaire   +1 more source

Facies of Middle and Upper Ordovician Rocks of Iowa

AAPG Bulletin, 1955
ABSTRACT Recent subsurface and outcrop studies of the Middle and Upper Ordovician rocks in Iowa show that facies changes are of considerable importance in the interpretation of the geologic history and in the correlation of the strata, which are oil-bearing in adjoining states.
openaire   +1 more source