Tectonic controls on late Cambrian-Early Ordovician deposition in Cordillera oriental (Northwest Argentina)
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DOI: 10.1007/s00531-020-01879-9
Abstract: The western Gondwana margin underwent a complex geodynamic history during the early Paleozoic, and major uncertainties remain as to the role of tectonism in sedimentary dynamics. This study focuses on the lower part Santa Rosita… read more here.
Keywords: early ordovician; cordillera oriental; deposition; oriental northwest ... See more keywords
New early Ordovician conodont data from the San Juan Formation, Central Precordillera (Argentina): Biostratigraphic and paleogeographic significance
Sign Up to like & getrecommendations! Published in 2020 at "Journal of South American Earth Sciences"
DOI: 10.1016/j.jsames.2020.102798
Abstract: Abstract The Early Ordovician conodont faunas from the Cerro La Chilca and Las Chacritas river sections (Central Precordillera) have been studied and compared to those of the well-known Talacasto section. The vertical distribution of the… read more here.
Keywords: ordovician conodont; early ordovician; juan formation; central precordillera ... See more keywords
The juxtaposition of Cambrian and early Ordovician magmatism in the Tafí del Valle area. Characteristics and recognition of Pampean and Famatinian magmatic suites in the easternmost Sierras Pampeanas
Sign Up to like & getrecommendations! Published in 2020 at "Journal of South American Earth Sciences"
DOI: 10.1016/j.jsames.2020.102878
Abstract: Abstract Along more than 1000 km, the boundary between the Pampean and Famatinian belts separates the Cambrian magmatism to the east (540-515 Ma) from the easternmost granitic rocks ascribed to the Famatinian orogeny to the west (early… read more here.
Keywords: valle area; early ordovician; magmatism; cambrian early ... See more keywords
An Early Ordovician (Floian) asterozoan (Echinodermata) of problematic class-level affinities
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Paleontology"
DOI: 10.1017/jpa.2019.82
Abstract: Abstract. Falloaster anquiroisitus new genus new species (Asterozoa, Echinodermata) is described from the Floian (Early Ordovician) Garden City Formation of Idaho. The new taxon is known from a single small specimen. Because of weathering, remaining… read more here.
Keywords: early ordovician; series; class level; asterozoan ... See more keywords
Systematics of the Early Ordovician (late Tremadocian; Stairsian) trilobite Gonioteloides Kobayashi, with species from the Great Basin, western USA
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DOI: 10.1017/jpa.2021.37
Abstract: Abstract. The Early Ordovician (late Tremadocian; Stairsian) trilobite Gonioteloides Kobayashi has long been known from a small number of pygidia assigned to a single formally named species, and its affinities have not been assessed. Silicified… read more here.
Keywords: early ordovician; late tremadocian; trilobite; tremadocian stairsian ... See more keywords
The first Early Ordovician graptolites and marine incursions in eastern Alborz, Iran
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DOI: 10.1017/s0016756821000273
Abstract: Abstract Graptolites have been collected from sections through Lower Ordovician strata in northern Iran. At the Saluk Mountains, in the Kopet–Dagh region, mudrocks yielded fragmentary tubaria of Rhabdinopora sp. cf. R. flabelliformis, indicating the presence… read more here.
Keywords: eastern alborz; early ordovician; iran; ordovician graptolites ... See more keywords