New palaeobotanical data from Carboniferous Culm deposits constrain the age of the Variscan deformation in the eastern Pyrenees

Geologica Acta

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Title New palaeobotanical data from Carboniferous Culm deposits constrain the age of the Variscan deformation in the eastern Pyrenees
 
Creator MARTÍN-CLOSAS, C.
TRIAS, S.
CASAS, J.M.
 
Subject Biostratigraphy; Sphenophyta; Turbidites; Lower Carboniferous; Variscan Orogeny
 
Description The pre-Variscan rocks of the Pyrenees exhibit a polyphase deformation linked to the Variscan crustal shortening and a low-pressure–high-temperature metamorphism. However, there is scarce chronostratigraphic evidence of this Variscan deformation. In the Pyrenean low-grade metamorphic domains, maximum ages have been provided by the synorogenic Carboniferous Culm deposits. In medium- to high-grade metamorphic areas, the Variscan regional metamorphism or intrusive magmatic bodies constrain the age of the main Variscan deformation structures. However, these data usually provide a minimum age. Here, we present new palaeobotanical records that assign a Namurian age to the base of the Culm deposits of la Cerdanya in the eastern Pyrenees. This dating is based on the co-occurrence of the sphenopsids Archaeocalamites radiatus, Mesocalamites cistiiformis and the seed of Cardiocarpus sp. The plant remains were found in sandstone facies produced by high-density turbidity flows of a deep-sea fan system. The new biostratigraphic information constrains the age of the Carboniferous Culm succession in the eastern Pyrenees.
 
Publisher Geologica Acta
Geologica Acta
Geologica Acta
 
Contributor MINECO
FEDER
AGAUR
 
Date 2018-06-21
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion

 
Format application/pdf
 
Identifier http://revistes.ub.edu/index.php/GEOACTA/article/view/GeologicaActa2018.16.2.1
10.1344/GeologicaActa2018.16.2.1
 
Source Geologica Acta; Vol 16, No 2; 107-123
Geologica Acta; Vol 16, No 2; 107-123
Geologica Acta; Vol 16, No 2; 107-123
1696-5728
1695-6133
 
Language eng
 
Relation http://revistes.ub.edu/index.php/GEOACTA/article/view/GeologicaActa2018.16.2.1/23516
http://revistes.ub.edu/index.php/GEOACTA/article/downloadSuppFile/GeologicaActa2018.16.2.1/3088
 
Coverage Pyrenees
Paleozoic; Carboniferous
Plants; Culm facies
 
Rights Copyright (c) 2018 Geologica Acta
 

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