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New finding of Upper Ordovician flora in Kazakhstan
International Geology Review, 1965Sixteen 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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Upper Cambrian and Lower Ordovician Rocks in Kansas
Bulletin (Kansas Geological Survey), 1948This report deals with Upper Cambrian and pre-Simpson Lower Ordovician beds that lie below the surface in Kansas and crop out in the surrounding states. The investigation was begun as a project of the Kansas Geological Survey and was completed under the auspices of the United States Department of the Interior.
Raymond P. Keroher, Jewell J. Kirby
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Palynostratigraphy of upper Cambrian-upper Ordovician intracratonic clastic sequences, North Africa
1999Detailed palynological study of subsurface sections in the Algerian Sahara (boreholes Nl-2 and Uc-101) and southern Tunisia (boreholes Sn-1 and St-1) enables precise dating and intrabasinal and extrabasinal stratigraphic correlation. Most of the study samples proved palyniferous, yielding abundant, well preserved acritarchs (148 species) together with ...
VECOLI M. +4 more
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AULACOPLEURID TRILOBITES FROM THE UPPER ORDOVICIAN OF VIRGINIA
Journal of Paleontology, 2005Abstract 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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Palynofacies in the Upper Ordovician of the Saxothuringian
Neues Jahrbuch für Geologie und Paläontologie - Monatshefte, 1994Erhard Reitz, Thomas Heuse
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Mottled Upper Ordovician Carbonates in Northwest Georgia
SEPM Journal of Sedimentary Research, 1975Mottled red and gray-green, silty limestones and calcareous siltstones occur in the Sequatchie Formation (Upper Ordovician) near Ringgold, Georgia. X-ray diffraction and optical methods show that the red mottles are due to the presence of diagenetic hematite, which was formed by oxidation of iron expelled from detrital chlorite.
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Upper Ordovician Bryozoa from Sardinia.
1990This paper presents the taxonomical descriptions of Upper Caradocian to Ashgillian bryozoans recovered from different localities from SW Sardinia and from one locality (Mulargia lake) from SE Sardinia. The investigated fauna belongs to 4 bryozoan orders: the Trepostomata, the Cystoporata, the Cryptostomata and the extant order Tubuliporata.
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Upper Ordovician Glaciation in Northwest Africa? Discussion
Geological Society of America Bulletin, 1971Faunal, paleomagnetic, and sedimentological arguments that claim to show the existence of a continental ice sheet in northwest Africa during the Ordovician and Silurian are questionable. Neither the fauna nor the relevant pole positions necessitate the presence of land ice.
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‘Middle Ordovician’ acritarchs are guide fossils for the Upper Ordovician
Lethaia, 1987openaire +1 more source
A revision of the Upper Ordovician brachiopod
Geologiska Föreningen i Stockholm Förhandlingar, 1974openaire +1 more source