Taphonomy and palaeoecology of high-stress benthic associations from the Upper Jurassic of Asturias, northern Spain

Fürsich, Franz T.; Werner, Winfried; Delvene, Graciela; García-Ramos, José Carlos; Bermúdez-Rochas, David D.; Piñuela, Laura

doi:10.1016/j.palaeo.2012.07.006

Cited by 33 publications

(8 citation statements)

References 17 publications

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“…However, marginal marine environments with faunas similar to that of the Alcobaça Formation are represented in the basin (Pratsch 1958) but are probably understudied. In the Asturias Basin in northwestern Spain, a single comprehensive coastal outcrop of the late Oxfordian to early Tithonian Ribadasella Group exposes a number of biofacies similar to those observed in the Lusitanian Basin, but seems to have a less intricate palaeoenvironmental development (Fürsich et al 2012;González Fernández et al 2014). Interestingly, significant thickness variations of Upper Jurassic strata in the subsurface (Boillot et al 1979;Boillot and Malod 1988;Cadenas and Fernández-Viejo 2016) indicate a more complex development at the basin scale and suggest that tectonic processes, including diapirism, may have been neglected so far.…”

Section: Control Of Diapirism On Facies Pattern and Benthic Communitiesmentioning

confidence: 91%

Life at the continental–marine interface: palaeoenvironments and biota of the Alcobaça Formation (Late Jurassic, Central Portugal), with a formal definition of the unit appended

Fürsich

Schneider²,

Werner

et al. 2021

Palaeobio Palaeoenv

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The Kimmeridgian Alcobaça Formation of the Lusitanian Basin forms a mixed carbonate–siliciclastic unit between basinal deposits of the Abadia Formation, and fluvial–terrestrial strata of the Lourinhã Formation. This study presents >2.5 km of detailed logs of nine outcrop sections of the Alcobaça Formation in its type region. Eight of these sections encircle the Caldas da Rainha Diapir, which was a prominent, emergent, passive salt diapir during the time of deposition. Palaeoenvironments of the unit form a complex mosaic of low- to high-energy, carbonate- or siliciclastic-dominated shallow shelf settings; coastal embayments and lagoons; and coastal plains with rivers, lakes and playas. In the strata, abundant microfauna is often joined by a rich macrofauna, usually dominated by bivalves. Locally, corals, calcareous sponges or oysters form meadows or patch reefs. These autochthonous to parautochthonous remnants of former communities are assigned to 35 benthic macrofaunal associations. The integration of palaeoecological analysis of these associations with microfaunal and sedimentological data provides constraint on their salinity ranges, which range from slightly hypersaline to freshwater. Frequent temporal and spatial salinity fluctuations are attributed to variations in relative sea-level, salt tectonics or climate. The NNE-trending Caldas da Rainha Diapir induced pronounced facies differentiation. Predominantly, non-marine siliciclastic facies in the northwest and carbonate to siliciclastic, marine to brackish facies in the southwest are contrasted by shallow-marine carbonate facies east of the diapir. Comprehensive exposure and well-preserved fossils make the Alcobaça Formation an excellent showcase to demonstrate how biofacies analysis can help to disentangle the interplay of climate changes, sea-level fluctuations and salt tectonics. Based on the improved characterisation of the unit, the Alcobaça Formation is formally defined, and seven members are established.

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Section: Control Of Diapirism On Facies Pattern and Benthic Communitiesmentioning

confidence: 91%

Life at the continental–marine interface: palaeoenvironments and biota of the Alcobaça Formation (Late Jurassic, Central Portugal), with a formal definition of the unit appended

Fürsich

Schneider²,

Werner

et al. 2021

Palaeobio Palaeoenv

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“…Field analysis included detailed measurement and sampling as well as macroscopic analysis of biotic content. Taphonomic data were collected with respect to biofabrics including packing, size-sorting, shell orientation patterns, fragmentation, disarticulation, and encrustation (e.g., Fürsich and Kirkland, 1986;Kidwell and Holland, 1991;Fürsich et al, 2012).…”

Section: Methodsmentioning

confidence: 99%

Paleoecological Dynamics of Shallow-Water Bivalve Carpets From a Lower Jurassic Lagoonal Setting, Northeast Italy

Bassi¹,

Posenato²,

Nebelsick³

2015

PALAIOS

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“…Occasional halite pseudomorphs and localized thin gypsum layers indicate phases of hypersaline conditions (Fürsich et al . ).…”

Section: Geographical and Geological Settingmentioning

confidence: 97%

New Unionida (Bivalvia) from the Kimmeridgian (Late Jurassic) of Asturias, Spain, and their palaeobiogeographical implications

Delvene

Munt

Piñuela

et al. 2016

Papers in Palaeontology

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This study focuses on new records of freshwater bivalves from the Late Jurassic Vega, Tereñes and Lastres formations of Asturias, northern Spain. Five new taxa Mujanaia abeuensis gen. et sp. nov., 'Unio' asturianus sp. nov., Margaritifera? lagriega sp. nov., Asturianaia colunghensis gen. et sp. nov. and Asturianaia lastrensis gen. et sp. nov. are described and included in the families Unionidae and Margaritiferidae (Unionida); they are compared and contrasted with other European, Asiatic and North American species. Their discov-ery constitutes the oldest records of Unionida in Spain, and they provide new palaeogeographical data on the distribution and origin of this group in Europe. These taxa are also an effective tool for the environmental reconstruction of the Jurassic ecosystems of Spain's Dinosaur Coast.

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Taphonomy and palaeoecology of high-stress benthic associations from the Upper Jurassic of Asturias, northern Spain

Cited by 33 publications

References 17 publications

Life at the continental–marine interface: palaeoenvironments and biota of the Alcobaça Formation (Late Jurassic, Central Portugal), with a formal definition of the unit appended

Life at the continental–marine interface: palaeoenvironments and biota of the Alcobaça Formation (Late Jurassic, Central Portugal), with a formal definition of the unit appended

Paleoecological Dynamics of Shallow-Water Bivalve Carpets From a Lower Jurassic Lagoonal Setting, Northeast Italy

New Unionida (Bivalvia) from the Kimmeridgian (Late Jurassic) of Asturias, Spain, and their palaeobiogeographical implications

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