Results 81 to 90 of about 1,022 (197)
A high-resolution integrated bio-chemostratigraphic framework is established for the upper Tremadocian to lower Floian (Lower Ordovician) succession of the North China Block, based on new conodont and carbon isotope (δ13Ccarb) data from the Jiguanshan ...
Gong, Fang Yi +12 more
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, 1986 Successive Tremadocian planktic dendroid graptolite assemblages from continental slope sequences in Quebec can be correlated with North American platform biozonations on the basis of conodonts.
Robert K. Stevens +2 more
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Diversification of Asaphellus Callaway, 1877 (Asaphidae: Trilobita) during the Tremadocian in South West Gondwana (Cordillera Oriental, Argentina) [PDF]
, 2015 Asaphellus Callaway, 1877 is the earliest widespread genus of the family Asaphidae Burmeister, 1843, and although its systematics bears several problematic issues, an input to overcome these difficulties has been attempted.
Beatriz Waisfeld +7 more
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, 1989 Nauplius-like larvae are reported from the Middle Arm Point Formation, Bay of Islands, western Newfoundland. The larval specimens are characterized by an ovoid body with three pairs of uniramous appendages and a prominent labrum.
Lars E. Fåhraeus, Kaustuv Roy
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The oldest record of Eothinoceratidae (Ellesmerocerida, Nautiloidea): Middle Tremadocian of the Cordillera Oriental, NW Argentina [PDF]
, 2010 Middle Tremadocian cephalopods from the Sierra de Mojotoro, Cordillera Oriental, NW Argentina, are assigned to Saloceras cf. sericeum (Salter) based on the siphuncle morphology and general shape of the conch. Saloceras sericeum (Salter) is known from the
N. Emilio Vaccari +3 more
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The Lower Ordovician (Tremadocian to Floian) graptolite fauna of Hunneberg, Västergötland, Sweden
, 2023 Published
openaire +3 more sources
Skeletal growth pattern of Protoentactinia gracilispinosa Kozur, Mostler & Repetski, 1996, a late Cambrian - Early Ordovician radiolarian species, revealed by X-ray tomography [PDF]
Fossil RecordMicro-computed tomography is increasingly important for the taxonomic analysis of early Palaeozoic radiolarians. It provides an opportunity to conduct detailed observations of the most internal parts of radiolarian skeletons in a non-destructive way. Our
Lusine Harutyunyan +4 more
doaj +3 more sources
, 2021 The Tremadocian graptolite and conodont faunas of the Gondwana Margin recorded at the Eastern Cordillera (EC) of Salta and Jujuy provinces (northwestern Argentina) are studied.
Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales +3 more
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PALYNOLOGICAL STUDY OF PALEOZOIC SEDIMENTS OF THE CHAL-I-SHEH AREA, SOUTHWESTERN IRAN [PDF]
Journal of Sciences, Islamic Republic of Iran, 1993 The Paleozoic sediments of the Chal-i-Sheh area in southwestern Iran comprising of Mila Formation, Ilebek Formation and Faraghan Formation, were studied palynologically. The samples containing well-preserved palynomorphs include acritarchs, chitinozoans,
doaj
Rivista Italiana di Paleontologia e Stratigrafia, 2020 The subject of this paper is new geological and stratigraphical data regarding the Paleozoic in the Sarrabus area (Southeastern Sardinia). More particularly Tremadocian (Lower Ordovician) acritarchs have been found in samples taken for microfossils ...
SEBASTIANO BARCA +2 more
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