Results 91 to 100 of about 6,336 (226)
U-Pb zircon age of Ordovician magmatism in the Albera Massif (Eastern Pyrenees)
Geologica Acta, 2011 New geochronological data from the Albera Massif confirm the presence of an Early – Mid Ordovician igneous event (472 - 465Ma) recorded in the pre-Variscan rocks of the Pyrenees.
M. LIESA TORRE-MARÍN +5 more
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Late Ordovician cephalopods from Morocco and their implications
Swiss Journal of PalaeontologyThe present paper describes the latest cephalopod fauna from the Upper Ordovician in the Anti-Atlas region, Morocco. Two species are reported herein belonging to two genera including one new species, Tafadnatoceras elfechtense sp. nov.
Xiang Fang +12 more
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The appearance of Rosenella (stromatoporoid sponge) in Baltica: new species from the Pirgu Stage (Katian, Upper Ordovician) of Estonia [PDF]
Estonian Journal of Earth SciencesThe Katian Age, part of the Late Ordovician Epoch, was a period of significant stromatoporoid diversification. However, their fossil record is often less continuous, hindering our understanding of their diversity and diversification.
Juwan Jeon, Ursula Toom
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Upper Ordovician Conodonts of Alabama
, 1973 Electronic ThesisUpper and upper Middle Ordovician rocks at six localities in northern Alabama yielded 1,973 conodonts referrable to 15 biological species distributed among 10 biological genera and 17 form-species distributed among 9 form-genera ...
Raymond, Dorothy Echols
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, 2016 A new collection of upper Middle Ordovician (Darriwilian) - perhaps extending into lower Upper Ordovician - conodonts is taken from the offshore P4 well (56o58’47.9’’N, 17o1’11.9’’E).
Ficini F., Stouge S., BAGNOLI, GABRIELLA
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Upper Ordovician conodonts in the Valbertad section
, 2017 .
BAGNOLI GABRIELLA +3 more
openaire +3 more sources
Ordovician acritarchs from the Upper Silesian Block
, 2005 Lower Palaeozoic sediments of the Upper Silesia Block have not been equally well investigated. Lower Cambrian sediments found in the southern and eastern marginal parts are so far best recognized.
Jachowicz, M.
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Bucaniidae (Gastropoda) from the Upper Ordovician of Norway
Norsk Geologisk Tidsskrift, 1999 Fourteen species of bellerophontoid gastropods of the Family Bucaniidae are described from the Upper Ordovician succession of the Oslo Region, Norway. Bucania sp. is compared with several species of Bucania that stand out morphologically by having a median dorsal carina, moderate to wide umbilici and an ornamentation consisting of crenulated growth ...
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Conodont biostratigraphy in the Middle–Upper Ordovician boundary beds of Estonia [PDF]
Estonian Journal of Earth Sciences, 2008 Conodonts of the uppermost Uhaku, the Kukruse, and the lower Haljala stages (uppermost Darriwilian and lower Sandbian) of Estonia are discussed. The distribution of conodonts within the Pygodus serra, P.
Viira, Viive
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The stratigraphy of the upper Ordovician of central Portugal. [PDF]
, 1985 The project has involved the revision of the stratigraphy of the upper part of the Ordovician succession in central Portugal. Using evidence derived principally from the study of measured sections, with some limited geological mapping, this thesis first ...
Young, Timothy Peter
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