Latest Jurassic–Early Cretaceous synrift evolution of the Torrelapaja Subbasin (Cameros Basin): implications for Northeast Iberia palaeogeography

Aurell, M. (Universidad de Zaragoza) ; Bádenas, B. (Universidad de Zaragoza) ; Castanera, D. ; Gasca, J.M. (Universidad de Zaragoza) ; Canudo, J.I. (Universidad de Zaragoza) ; Laita, E. (Universidad de Zaragoza) ; Liesa, C.L. (Universidad de Zaragoza)

Resumen: The reconstruction of the latest Jurassic–Early Cretaceous evolution of the Torrelapaja Subbasin (Cameros Basin, Spain) resulted in the characterization of three synrift sequences (SS-1, SS-2 and SS-3) bounded by major unconformities. Three major NW–SE normal faults combined with smaller scale faults of variable direction (around NE–SW) controlled the sedimentation. The complex geometry of the Torrelapaja Subbasin indicates a main extension direction of NE–SW, and a secondary NW–SE extension. Sedimentation of the Tithonian–middle Berriasian SS-1 occurred in alluvial fan systems, grading upwards to carbonate palustrine-lacustrine environments. A new vertebrate site with large size sauropod bones has been found in the middle part of SS-1. The lower boundary of the uppermost Hauterivian–lower Barremian SS-2 is locally a palaeokarst, with sedimentary infill including three new fossil sites with remains of ornithopod, sauropod and theropod dinosaurs. Sedimentation of SS-2 encompasses distal alluvial terrigenous facies with local palaeosoils and palustrine-lacustrine limestones grading upwards to middle-distal alluvial facies. After a late Barremian–early Albian stratigraphic gap, sedimentation resumed in coastal flat environments represented by the mudstones with intercalated skeletal (oyster-rich) sandy limestones with carbonaceous plant remains of the SS-3. A middle–late Albian age assignment of SS-3 based on regional correlation is supported by strontium isotopic data. This unit marks the first Early Cretaceous marine incursion in the area from the northern Atlantic realm. This is a notable change of the previous palaeogeographical reconstructions which established that the first marine encroachment occurred in the early Aptian and was sourced from Tethysian domains. © 2021 Elsevier Ltd

Idioma: Inglés

DOI: 10.1016/j.cretres.2021.104997

Año: 2021

Publicado en: Cretaceous Research 128 (2021), 104997 [27 pp]
ISSN: 0195-6671

Factor impacto JCR: 2.432 (2021)

Categ. JCR: PALEONTOLOGY rank: 12 / 54 = 0.222 (2021) - Q1 - T1
Categ. JCR: GEOLOGY rank: 13 / 49 = 0.265 (2021) - Q2 - T1

Factor impacto CITESCORE: 4.1 - Earth and Planetary Sciences (Q2)

Factor impacto SCIMAGO: 0.751 - Paleontology (Q1)

Financiación: info:eu-repo/grantAgreement/ES/AEI/PID2019-108705GB-I00
Financiación: info:eu-repo/grantAgreement/ES/DGA/E18-20R
Financiación: info:eu-repo/grantAgreement/ES/DGA/E32-20R
Financiación: info:eu-repo/grantAgreement/ES/MICINN/CGL2017-85038-P

Tipo y forma: Artículo (PostPrint)

Área (Departamento): Área Paleontología (Dpto. Ciencias de la Tierra)
Área (Departamento): Área Estratigrafía (Dpto. Ciencias de la Tierra)
Área (Departamento): Área Geodinámica Interna (Dpto. Ciencias de la Tierra)
Área (Departamento): Área Cristalografía Mineralog. (Dpto. Ciencias de la Tierra)