Taphonomy of a Mysticete Whale from the Lower Pliocene of the Coast of Cádiz (Spain) DOI Creative Commons
Giulia Bosio, Ildefonso Bajo Campos, Alberto Collareta

et al.

Journal of Marine Science and Engineering, Journal Year: 2023, Volume and Issue: 12(1), P. 17 - 17

Published: Dec. 20, 2023

A fossil mysticete was discovered along the southwestern coast of Spain, occurring in a block detached from Neogene deposits exposed coastal cliff at locality Conil de la Frontera (Cádiz, Spain). These range Pliocene to Pleistocene age and include shallow-marine, mixed carbonate–siliciclastic sediments, with whale being found occurrence stratigraphic unconformity marked by Thalassinoides burrows. 87Sr/86Sr analyses on oyster shells associated skeleton suggest an Early age, agreement lowermost unit cropping out study site. The studied cetacean specimen consists articulated, almost complete balaenopteroid field dorsal side up; contained upside-down block, however, it is preserved ventral disposition. Bones exhibit low degree preservation cortical bone tissue, which locally features shark bite marks Osedax traces as well abundant encrustations barnacles ostreids. Two teeth were also near skeleton. have their main histological features, even though they microcracks, dissolution, substitution Fe oxides, microborings. Sediment particles late diagenetic cements fill medullary cavities. We propose that carcass experienced refloating before sinking seafloor probably for some time eventually buried.

Language: Английский

Facies Analysis of Gravity-Flow Deposits from the Upper Cretaceous of the Alborz Mountains (Northern Iran) DOI
Hedieh Abbasian,

Mahboubeh Hosseini-Barzi,

Abbas Sadeghi

et al.

Marine and Petroleum Geology, Journal Year: 2025, Volume and Issue: unknown, P. 107395 - 107395

Published: March 1, 2025

Language: Английский

Citations

0
Assessing the expansion of the Cambrian Agronomic Revolution into fan-delta environments DOI Creative Commons

Andrei Ichaso,

Luís A. Buatois, M. Gabriela Mángano

et al.

Scientific Reports, Journal Year: 2022, Volume and Issue: 12(1)

Published: Aug. 24, 2022

Abstract The intensity, extent, and ecosystem-level impact of bioturbation (i.e. Agronomic Revolution) at the dawn Phanerozoic is a hotly debated issue. Middle Cambrian fan-delta deposits in southwestern Saskatchewan provide insights into paleoenvironmental extent Revolution marginal-marine environments. studied reveal that several environmental stressors had direct on trace-fossil distribution intensities fan deltas. Basal proximal subaerial are characterized by very coarse grain size absence bioturbation. Mid-fan fan-toe were formed under subaqueous conditions rapid events between sedimentation episodes when ameliorated, providing evidence significant landward expansion Revolution. Transgressive marine accumulated after abandonment system display high levels reflecting stable favored endobenthic colonization. presence intense both delta transgressive provides further support to view biogenic mixing high, provided reached. Our study underscores importance evaluating sedimentary facies changes assess factors prior making evolutionary inferences.

Language: Английский

Citations

12
New Pliocene Rhinocerotidae findings from the Iberian Peninsula and the revision of the Spanish Pliocene records DOI Creative Commons
Luca Pandolfi,

Joaquín Bosque Sendra,

Matías Reolid

et al.

PalZ, Journal Year: 2022, Volume and Issue: 96(2), P. 343 - 354

Published: Jan. 21, 2022

Abstract A fragmentary mandible from the early Pliocene of Vera Basin is here investigated to clarify its taxonomic position. The studied specimen assigned Pliorhinus megarhinus , documented in Europe latest Miocene mid-Pliocene. morphometrical comparison reveals that this taxon larger than Stephanorhinus etruscus and S. jeanvireti but overlaps with Dihoplus schleiermacheri . P. D. differ some characters lower molars, such as length metalophid shape trigonid occlusal view, thus allowing new considerations on Spanish rhinocerotine record. According results obtained, three species are at least Span during Pliocene: miguelcrusafonti presence has be verified confirmed by further evidence. a relict Spain discarded.

Language: Английский

Citations

5
Variable Ophiomorpha ichnofabric: Improving the understanding of mouth bar environments in fan-delta complex depositional settings from the Upper Cretaceous of NW South America DOI
Carlos A. Giraldo-Villegas, Francisco J. Rodrı́guez-Tovar, Sergio A. Celis

et al.

Cretaceous Research, Journal Year: 2023, Volume and Issue: 154, P. 105730 - 105730

Published: Oct. 5, 2023

Language: Английский

Citations

2
Late Cretaceous marine flooding and installation of a mangrove swamp environment in the Prebetic (Betic External Zones, SE Spain) DOI Creative Commons
Matías Reolid, Mario Sánchez‐Gómez, Elisa Laita

et al.

Journal of Iberian Geology, Journal Year: 2024, Volume and Issue: unknown

Published: July 9, 2024

Abstract The Cenomanian (Upper Cretaceous) sedimentary rocks of the External Prebetic (Betic Cordillera) in Sierra de Montearagón-Carcelén (SE Spain) record transgression and flooding continental deposits subsequent development an inner shallow carbonate platform. transgressive surface is densely colonized by infaunal trace-makers Glossifungites ichnofacies ( Gastrochaenolites ), which indicate sediment starvation erosion as well colonization a firmground. first were thick calcarenite bar (2 to 11 m) with large-scale cross-bedding pointing high-energy environment Rosselia Ophiomorpha ) confirms loose sandy bottom under conditions. overlaying stratigraphic succession characterized subtidal laminated marly limestones intertidal rhizoliths interpreted mangrove swamp environment. These facies are organized shallowing-upwards sequences. An episodic event represented bivalve-rich representing shell lags disarticulated valves. This could be related climatic perturbation evidenced negative excursion δ 13 C 18 O. successive sequences persisted thanks subsidence tectonically controlled depocenters located south Montearagón-Carcelén. differential subsidence, increasing thickness towards sector study, suggests activity listric faults that depocenters. report this very extensive developed close land emerged.

Language: Английский

Citations

0
Along-Strike Reservoir Development of Steep-Slope Depositional Systems: Case Study from Liushagang Formation in the Weixinan Sag, Beibuwan Basin, South China Sea DOI Creative Commons
Sheng Liu, Hongtao Zhu, Qinghua Liu

et al.

Energies, Journal Year: 2023, Volume and Issue: 16(2), P. 804 - 804

Published: Jan. 10, 2023

Seismic, core, drilling, logging, and thin-section data are considered to analyze the reservoir diversity in east, middle, west fan of Liushagang Formation steep-slope zone Weixinan Sag, Beibuwan Basin. Three factors primarily affect differences for systems: (1) Sedimentary mostly control scales characteristics drainage system microfacies. Massive high-quality reservoirs have shallow burial depths. Channel development sediment supply favor formation these reservoirs. The sedimentary microfacies suggest delta plain distributary channels. (2) Lithofacies types evolution. diagenesis is weak, a weak compaction–cementation diagenetic facies medium compaction–dissolution were developed. (3) Sandstone thickness oil-bearing properties average porosity permeability large, critical sandstone small, capacity high. Furthermore, prediction models summarized as nearshore subaqueous models. model plain, lithology medium–coarse sandstone. organic acid + meteoric freshwater two-stage dissolution developed, various dissolved pores formed, Type I middle fan, medium–fine Only dissolution, pores, I–II Regarding models, large-scale, channel Weak evolution, good physical properties, thick sandstone, developed reservoir. study northern was undertaken order guide predictions. Further, it provides reference distribution system.

Language: Английский

Citations

1
Ichnology of Lower Cretaceous prodelta and delta front deposits of the Sidi Khalif Formation, Central Tunisia DOI
Sami Riahi, Alfred Uchman

Facies, Journal Year: 2022, Volume and Issue: 68(1)

Published: Jan. 1, 2022

Language: Английский

Citations

1
Pliocene trace fossils from oyster substrates in the Nijar Basin, Betic Cordillera, southern Spain DOI
Stephen K. Donovan, Stuart J. Jones,

Abigail R. King

et al.

Proceedings of the Geologists Association, Journal Year: 2021, Volume and Issue: 132(3), P. 358 - 368

Published: May 6, 2021

Language: Английский

Citations

1
Primer registro de Palaeoloxodon cf. antiquus (Proboscidea, Pleistoceno Medio) del sector oriental de la Cuenca del Guadalquivir (SE España): tafonomía y relación con otros yacimientos DOI Creative Commons
Matías Reolid, Mario Sánchez‐Gómez, Sergio Ros-Montoya

et al.

Estudios Geológicos, Journal Year: 2021, Volume and Issue: 77(1), P. e136 - e136

Published: May 11, 2021

El primer registro de un proboscídeo en el sector oriental la Cuenca del Guadalquivir se ha localizado los abanicos aluviales desarrollados durante una etapa intensa erosión nuevos relieves frente montañoso más externo Cordillera Bética. fósil estudiado es fragmento defensa 74 cm longitud que fue transportado por las corrientes alimentaban abanico deltaico Pleistoceno medio. Este resto encuentra dentro unos depósitos detríticos alta energía varían entre tamaño arena gruesa y bloques. revestido costra carbonatada laminada espesor inferior a 2 cm. análisis detallado esta permitido identificar estructuras asignables briofitas fósiles. Por lo tanto, interpreta recubierta casi completamente musgo experimentó cementación temprana. Posiblemente formación favoreció preservara. Un posterior enterramiento rápido también debió favorecer preservación. líneas Schreger superficies fractura asignar especie elefante Palaeoloxodon cf. antiquus. ejemplar poblaciones occidental Guadix-Baza. No descarta posibilidad existieran migraciones estacionales P. antiquus tierras bajas menos 200 m altura sobre nivel mar, altiplano Guadix-Baza, encima 900 altura.

Citations

1
Tracking lithospheric delamination and surface processes across the Messinian salinity crisis DOI Creative Commons
Frédéric Mouthereau, Louise Boschetti, Marine Larrey

et al.

Research Square (Research Square), Journal Year: 2023, Volume and Issue: unknown

Published: Dec. 8, 2023

Abstract Lithospheric delamination involves short-lived crustal and surface responses, alkaline magmatism, high heat flow extension. In the Western Mediterranean, is thought to have triggered uplift at origin of Messinian Salinity Crisis (MSC). This scenario questioned by insufficient temporal resolution relative other proposed mechanisms that include shortening slab detachment. Here, we report new U-Pb ages clumped isotope analyses from calcite veins formed in an intramontane basin eastern Betics. They reveal a fluid event 8.5 5 Ma linked extension retreating delamination. The end coincides with onset 4.5-3 across boundary between Cabo de Gata arc basement Iberia margin. Our results MSC was established before while underway. therefore product long-lived lithospheric thinning evolution calc-alkaline high-alkaline magmatism during After MSC, around Ma, detachment formation plate fault tectonic escape Africa Iberia.

Language: Английский

Citations

0