Results 171 to 180 of about 275,631 (233)
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The Avalonian-Cadomian Belt and related peri-Gondwanan terranes
International Journal of Earth Sciences, 2004During the past decade it has widely been accepted that the Avalonian-Cadomian belt results from Neoproterozoic to early Paleozoic Andean-type orogeny, that was active at the northern margin of Gondwana. The major imprints of this orogeny are recorded by so-called periGondwanan terranes which faced open oceans during the Neoproterozoic.
W. D�rr +3 more
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A peri-Gondwanan arc in NW IberiaI: Isotopic and geochemical constraints on the origin of the arc—A sedimentary approach [PDF]
Gondwana Research, 2010 The arc-derived upper terrane in the NW Iberia Variscan belt contains a 3000 m thick turbiditic formation at its structural top. Most of the sandstones are feldspathic greywackes with a framework of quartz and weakly altered plagioclase. Rock fragments of vitric and microgranular texture are common in polymictic conglomerates and coarse ...
JOSÉ Manuel Fuenlabrada +2 more
exaly +4 more sources
Geoscience Frontiers, 2014 AbstractThe basement of the Romanian Carpathians is made of Neoproterozoic to early Paleozoic peri-Gondwanan terranes variably involved in the Variscan orogeny, similarly to other basement terrains of Europe. They were hardly dismembered during the Alpine orogeny and traditionally have their own names in the three Carpathian areas.
Ioan Balintoni +2 more
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Canadian journal of earth sciences (Print), 2023
The Yarmouth Island Formation of the East Harpswell Group (EHG) is an assemblage of metamorphosed volcanic and sedimentary rocks exposed in Casco Bay, Maine. Although previously interpreted to have been deposited ca. 445 Ma, two new U–Pb zircon ages from
S. Johnson, D. P. West, E. Peterman
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The Yarmouth Island Formation of the East Harpswell Group (EHG) is an assemblage of metamorphosed volcanic and sedimentary rocks exposed in Casco Bay, Maine. Although previously interpreted to have been deposited ca. 445 Ma, two new U–Pb zircon ages from
S. Johnson, D. P. West, E. Peterman
semanticscholar +1 more source
The Appalachian peri-Gondwanan realm: a palaeogeographical perspective from the south
Geological Society, London, Special Publications, 2005Abstract The Appalachian peri-Gondwanan realm (APGR) is an extensive tract of exotic Neoproterozoic-early Palaeozoic crustal blocks that occupies the eastern flank of the orogen. Traditionally, southern APGR elements have been correlated with those of the northern Appalachians on the basis of gross geological similarities.
James P. Hibbard +3 more
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Geosphere
During the assembly of Pangea, peri-Gondwanan terranes collided with the eastern and southern margins of Laurentia and brought with them unique detrital zircon U-Pb signatures.
T. Smith +6 more
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During the assembly of Pangea, peri-Gondwanan terranes collided with the eastern and southern margins of Laurentia and brought with them unique detrital zircon U-Pb signatures.
T. Smith +6 more
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Late Palaeozoic Evolution of the Peri-Gondwanan Plates of SE Asia
Proceedings, 2011The continents forming the core of Gondwana include South America, Africa, Madagascar, India, Antarctica and Australia. The location of numerous smaller continental blocks that bordered Gondwana is less certain. These smaller blocks were assembled during the Early Paleozoic time to Gondwana, forming the so-called Peri-Gondwanan zone. The following were
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Soviet Economy
The timing and mechanism of the crustal extension that caused blocks of continental crust to rift and drift northwards from the northern Gondwana margin during the Early Palaeozoic are currently debated.
Okşan Gökçen Uğurcan, T. Ustaömer
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The timing and mechanism of the crustal extension that caused blocks of continental crust to rift and drift northwards from the northern Gondwana margin during the Early Palaeozoic are currently debated.
Okşan Gökçen Uğurcan, T. Ustaömer
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Late Silurian cephalopods from Langkawi, Malaysia, with peri-Gondwanan faunal affinity
Journal of Systematic Palaeontology, 2018Nine species of late Pridoli (latest Silurian) orthocerid cephalopods are described from the Upper Setul Limestone of Pulau Langgun, Langkawi Islands, Malaysia. These are the orthoceratids Michelinoceras (Michelinoceras) cf. michelini (Barrande, 1866), Michelinoceras? sp., Kopaninoceras setulense sp. nov., Mimogeisonoceras? langgunense sp.
S. Niko, M. Sone, Mohd. Shafeea Leman
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