Results 151 to 160 of about 1,952 (183)

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.
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New finding of Upper Ordovician flora in Kazakhstan

International Geology Review, 1965
Sixteen occurrences of fossils of Ordovician land plants are recorded from Kazakhstan. These plant remains occur together with a fauna which dates the beds as Upper Ordovician (Caradocian). The fragmentary specimens belong to at least three ancient types of land flora: Psilopsida, Lycopsida, and Sphenopsida.
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Ordovician Algal Stromatolites in Upper Mississippi Valley: ABSTRACT

AAPG Bulletin, 1966
Algal stromatolites locally comprise as much as half of the Willow River Dolomite (Prairie du Chien Group) in the upper Mississippi Valley. They exhibit two basic forms: mounds which may range up to 4 feet in diameter and mats which may be extensive.
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AULACOPLEURID TRILOBITES FROM THE UPPER ORDOVICIAN OF VIRGINIA

Journal of Paleontology, 2005
Abstract Five species of aulacopleurid trilobites occur in rich, silicified trilobite faunas from the Upper Ordovician of Virginia: Harpidella triloba (Hu, 1975a), Strasburgaspis cona (Hu, 1971), and Strasburgaspis? n. sp. A, all from the Turinian Edinburg Formation, Harpidella whittingtoni new species, from the overlying Turinian Oranda Formation, and
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LARGE ORDOVICIAN CEPHALOPODS FROM MICHIGAN’S UPPER PENINSULA

Geological Society of America Abstracts with Programs, 2021
Ryan Shell, David Peterman
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Upper Ordovician trilobites from central New South Wales

1974
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
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Late Ordovician-Early Silurian extension of the northern margin of the Upper Yangtze Platform (South China) and its impact on organic matter accumulation

Journal of Petroleum Science and Engineering, 2023
Bin Xiao
exaly  

‘Middle Ordovician’ acritarchs are guide fossils for the Upper Ordovician

Lethaia, 1987
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The Upper Ordovician Fredericktown Section, Nelson County, Kentucky

1986
Abstract The Fredericktown Section is in Nelson County, Kentucky, in the southwestern quarter of the Maud 7½-minute quadrangle (Peterson, 1972) in a roadcut along the southwestern side of U.S.150, 4.5 miles (7.2 km) east of the Bluegrass Parkway (Fig. 1).
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Bryozoans and stratigraphy, Upper Richmondian (Cincinnatian, Ordovician)

2005
Charles Ross, June Ross
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