Sponges and corals from the Middle Eocene (Bartonian) marly formations of the Pamplona Basin (Navarre, western Pyrenees): taphonomy, taxonomy, and paleoenvironments

Astibia, H.; Elorza, Javier; Pisera, Andrzej; Álvarez-Pérez, German; Payros, Aitor; Ortíz, Silvia

doi:10.1007/s10347-013-0364-2

Cited by 15 publications

(44 citation statements)

References 18 publications

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“…The fine-grained nature of the sediment, the absence of gravity-flow deposits and the absence of light-dependant organisms suggest that the marls accumulated in a flat, aphotic seabed located below stormwave base. This interpretation is further supported by the microforaminiferal content, similarly as common hexactinellid sponges and their preservation, which is indicative of outerplatform to upper-slope environments (Astibia et al, 2014).…”

Section: Geological Settingmentioning

confidence: 74%

“…The oldest Bartonian units (Erize Marl Formation, Ezkaba Sandstone Formation and Pamplona Marl Formation) still show sedimentological and palaeontological evidence of accumulation in relatively deep waters, and they were attributed to slope , turbiditic channel-levee (Payros et al, 1997) and prodelta (Astibia et al, 2005) environments, respectively. The overlying Ardanatz Sandstone Formation (also referred to as Gazolaz, Tajonar, Tabar and/or Gongolaz sandstone in the regional literature) has been thoroughly studied by Astibia et al (1999Astibia et al ( , 2005Astibia et al ( , 2006Astibia et al ( , 2014. Silty marls are dominant in the locality of Ardanatz (central part of the study area), but they contain abundant tabular sandstone beds, which display sharp bases with occasional groove casts (indicating ENE palaeocurrent direction) and gradational upper boundaries; they are rich in carbonaceous plant remains, vertical and horizontal burrows (mainly Ophi- omorphids, sensu Seilacher, 2007) and bioclasts (e.g.…”

Section: Geological Settingmentioning

confidence: 99%

“…However, from the general palaeogeographic layout outlined above, it is more likely that these features constituted delta-front channels across which fluvially-derived hyperpycnal flows entered the sea and eventually fed the flood-generated delta-front lobes. The Ardanatz Sandstone Formation interfingers both laterally and vertically with the Ilundain Marl Formation (Astibia et al, 2014;Fig. 2).…”

Section: Geological Settingmentioning

confidence: 99%

“…These micropalaeontological data are added to those made in Arraitza (level ARR1.1), in Ardanatz (levels AD2.1 and AD3.1), and in the Liédena Sandstone (Liédena and other localities, facies B1, B3 and B4) (in Payros et al, 2000;Astibia et al, 2014).…”

Section: Pamplona Fmmentioning

confidence: 99%

“…Local micropaleontological determinations were carried out later by Puigdefábregas (1975) and Alameda et al (1993). Macropalaeontological works on the bivalve Dimya pamplonensis (Calzada and Astibia, 1996), turtles and sirenians (Astibia et al, 1999;Buffrénil et al, 2008), and sponges and corals (Astibia et al, 2014) have been published in the latest years. Avian ichnofossils from the Gendulain Formation were cited and described in Mangin (1959Mangin ( -1960, Raaf et al (1965), Payros et al (2000), Astibia et al (2007), and Astibia et al (in press).…”

Section: Introductionmentioning

confidence: 99%

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Fossil associations from the middle and upper Eocene strata of the Pamplona Basin and surrounding areas (Navarre, western Pyrenees)

Astibia

Payros

Ortíz³

et al. 2016

Journal of Iberian Geology

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Fossil associations from the middle and upper Eocene (Bartonian and Priabonian) sedimentary succession of the Pamplona Basin are described. This succession was accumulated in the western part of the South Pyrenean peripheral foreland basin and extends from deep-marine turbiditic (Ezkaba Sandstone Formation) to deltaic (Pamplona Marl, Ardanatz Sandstone and Ilundain Marl formations) and marginal marine deposits (Gendulain Formation). The micropalaeontological content is high. It is dominated by foraminifera, and common ostracods and other microfossils are also present. The fossil ichnoasssemblages include at least 23 ichnogenera and 28 ichnospecies indicative of Nereites, Cruziana, and ?Scoyenia-Mermia ichnofacies. Body macrofossils of about 80 taxa corresponding to macroforaminifera, sponges, corals, bryozoans, brachiopods, annelids, molluscs, arthropods, echinoderms and vertebrates have been identified. Both the number of ichnotaxa and of species (e. g. bryozoans, molluscs and condrichthyans) may be considerably higher. Body fossil assemblages are comparable to those from the Eocene of the Nord Pyrenean area (Basque Coast), and also to those from the Eocene of the west-central and eastern part of South Pyrenean area (Aragon and Catalonia). At the European scale, the molluscs assemblages seem endemic from the Pyrenean area, although several Tethyan (Italy and Alps) and Northern elements (Paris Basin and Normandy) have been recorded. Palaeontological data of studied sedimentary units fit well with the shallowing process that throughout the middle and late Eocene occurs in the area, according to the sedimentological and stratigraphical data.Se describen las asociaciones fósiles del Eoceno medio y superior (Bartoniense y Priaboniense) de la sucesión sedimentaria de la Cuenca de Pamplona. Esta sucesión se acumuló en la parte oeste de la Cuenca de antepaís periférica surpirenaica y comprende desde turbiditas marinas profundas (Formación Areniscas de Ezkaba) hasta depósitos deltaicos (Formaciones Margas de Pamplona, Areniscas de Ardanatz y Margas de Ilundain) y marinos marginales (Formación Gendulain). El contenido micropaleontológico es alto y está dominado por los foraminíferos. Los fósiles de ostrácodos y otros organismos son también abundantes. Las asociaciones de icnofósiles incluyen al menos 23 icnogéneros y 28 ichnoespecies, indicativas de las icnofacies de Nereites, Cruziana, y ?Scoyenia-Mermia. Se han identificado fósiles corporales de unos 80 taxones, correspondientes a macroforaminíferos, esponjas, corales, briozoos, braquiópodos, anélidos, moluscos, artrópodos, equinodermos y vertebrados. El número de icnotaxones y de especies (p. e. briozoos, moluscos gasterópodos, bivalvos y peces condríctios) puede ser considerablemente mayor. Las asociaciones de fósiles corporales son comparables a las del Eoceno del Área norpirenaica (Costa vasca) y de las partes central y este del Área surpirenaica (Aragón y Cataluña). A escala europea, la asociación de moluscos parece endémica del Área pirenaica,...

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Section: Geological Settingmentioning

confidence: 74%

Section: Geological Settingmentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 99%

Section: Pamplona Fmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fossil associations from the middle and upper Eocene strata of the Pamplona Basin and surrounding areas (Navarre, western Pyrenees)

Astibia

Payros

Ortíz³

et al. 2016

Journal of Iberian Geology

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Trace fossils from the Middle and Upper Eocene (Bartonian–Priabonian) molasse deposits of the Pamplona Basin (Navarre, western Pyrenees): palaeoenvironmental implications

et al. 2016

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An ichnological study was carried out in the Middle-Upper Eocene sedimentary succession of the Pamplona Basin. This succession represents the molasse stage of the western part of the South Pyrenean peripheral foreland basin and extends from deep-marine turbiditic (Ezkaba Sandstone Formation) to deltaic (Pamplona Marl, Ardanatz Sandstone and Ilundain Marl formations) and marginal marine deposits (Liédena Sandstone Member, Gendulain Formation). The tectonosedimentary evolution of the basin can also be recognized by means of the ichnoassemblages preserved throughout the succession and by the ichnofacies analysis. A total of 23 ichnogenera and at least 28 ichnospecies have been identified. The assemblage of the Ezkaba Sandstone is characteristic of the deep-sea Nereites ichnofacies. The Ophiomorpha rudis and the Paleodictyon ichnosubfacies can be differentiated in this unit, which are typical of channel axis and off-axis environments. Trace fossils in the Ardanatz Sandstone and Ilundain Marl formations, with dominance of Thalassinoides and especially Ophiomorpha, could be related to the Cruziana ichnofacies, developed in relatively low-energy environments, in semicohesive muddy substrates with intercalated silt and sand. The ichnofauna of the Liédena Sandstone Member is composed of bird tracks, and invertebrate horizontal and vertical structures. Microbial mat impressions also occur. The evidence suggests that microbial mats acted as a taphonomic bias favouring the preservation of vertebrate tracks and conditioning the presence of other trace fossils. Consequently, the assignation of this ichnofauna to a specific ichnofacies is tentative, most likely a combination of the Mermia and Scoyenia ichnofacies.

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The effects of astronomically forced climate change on hemipelagic carbonate sedimentation in a tectonically active setting: the Albian Mioño Formation in Castro Urdiales (Cantabria, N Spain)

et al. 2022

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Our understanding of the stratigraphic expression of astronomically driven climate-change cycles in the Milankovitch frequency band has improved significantly in recent decades. However, several aspects have been little studied to date, such as the nature of the climatically regulated environmental processes that ultimately control cyclic sedimentation. Similarly, relatively little is known about the expression of Milankovitch cycles in successions accumulated in tectonically active basins. In order to fill this knowledge gap, the Albian hemipelagic deposits of the Mioño Formation exposed in Castro Urdiales (Basque-Cantabrian Basin) are studied herein. These deposits were accumulated during a rifting phase with strong tectonic activity. The sedimentological, petrographic and cyclostratigraphic analysis demonstrates that, despite the synsedimentary tectonic instabilities and some diagenetic overprinting, the hemipelagic carbonate alternation was astronomically forced 110.68–110.47 Ma. Seasonality fluctuations driven by precession cycles caused periodic (20 ky) variations in the rate of carbonate productivity (abundance of pelagic calcareous plankton and micrite exported from adjacent shallow-water areas) and/or siliceous dilution (terrestrially derived siliciclastic sediment supply and siliceous particle production by sponges). These variations resulted in the formation of marly limestone beds when annual seasonality was low (i.e., boreal summer at aphelion, winter at perihelion) and the accumulation of marlstones when seasonality increased (i.e., boreal summer at perihelion, winter at aphelion). The incidence of these processes increased and decreased in line with seasonality modulation by short-eccentricity cycles of 100 ky. In conclusion, this study shows that Milankovitch cycles can be reliably recorded in hemipelagic successions accumulated in tectonically active settings if sediment gravity flows or other disturbances do not affect autochthonous sedimentation.

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Sponges and corals from the Middle Eocene (Bartonian) marly formations of the Pamplona Basin (Navarre, western Pyrenees): taphonomy, taxonomy, and paleoenvironments

Cited by 15 publications

References 18 publications

Fossil associations from the middle and upper Eocene strata of the Pamplona Basin and surrounding areas (Navarre, western Pyrenees)

Fossil associations from the middle and upper Eocene strata of the Pamplona Basin and surrounding areas (Navarre, western Pyrenees)

Trace fossils from the Middle and Upper Eocene (Bartonian–Priabonian) molasse deposits of the Pamplona Basin (Navarre, western Pyrenees): palaeoenvironmental implications

The effects of astronomically forced climate change on hemipelagic carbonate sedimentation in a tectonically active setting: the Albian Mioño Formation in Castro Urdiales (Cantabria, N Spain)

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