Architectural evolution of a mixed-influenced deltaic succession: Lower-to-Middle Ordovician Armorican Quartzite in the southwest Central Iberian Zone, Penha Garcia Formation (Portugal)

Bayet‐Goll, Aram; Carvalho, Carlos Neto de

doi:10.1007/s00531-020-01915-8

Cited by 9 publications

(1 citation statement)

References 77 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, caution should be exercised in extrapolating the results of this study to other deltaic units elsewhere without conducting a detailed facies analysis because deltas are extremely complex systems in which stressors operate at multiple temporal and spatial scales (e.g. Bayet‐Goll & Neto De Carvalho, 2017, 2020; Dasgupta et al, 2016; MacEachern et al, 2005).…”

Section: Discussionmentioning

confidence: 99%

The interplay of environmental constraints and bioturbation on matground development along the marine depositional profile during the Ordovician Radiation

et al. 2021

View full text Add to dashboard Cite

This study documents the distribution of matgrounds in a wide variety of environments recorded in the Ordovician Lashkerak and Ghelli Formations in the Alborz Mountains of northern Iran in order to evaluate controls on their distribution along the marine depositional profile. Detailed facies analysis allowed differentiating three groups of facies associations in the Lower to Upper Ordovician deposits of the Lashkerak formation: (i) estuarine system; (ii) wave‐dominated shoreface‐offshore complex; and (iii) mixed river‐ and wave‐influenced deltaic system. The Middle to Upper Ordovician deposits of the Ghelli formation are divided into two groups of facies associations: (i) tide‐influenced deltaic succession and (ii) deep‐water fan system. Microbially induced sedimentary structures (MISS) are present in deposits formed in the central estuarine basin (Lashkerak formation) and in proximal lobes and lobe fringes of deep–water turbidite fans (Ghelli formation). On the contrary, MISS are absent in deposits from the wave‐dominated shoreface‐offshore complex, river‐ and tide‐dominated deltas, and various subenvironments of the incised wave‐dominated estuary (i.e., bayhead delta and estuary mouth) and the deep‐marine turbidite fan system (i.e., turbidite channel, slope, and outer lobe). The lack of evidence of mat‐building microorganisms in the deltaic systems may have resulted from two factors: (1) high physico‐chemical stressors caused by river‐induced processes, and (2) increase in degree of sediment disturbance, biodiffusion, and bioirrigation by burrowing organisms. Formation of microbial mats in the wave‐dominated shoreface‐offshore complex was inhibited by the activity of an abundant and diverse infauna capable of reworking the sediment. Our analysis shows that the spatial distribution of microbial mats was controlled by an interplay of environmental factors and innovations in animal‐substrate interactions, mostly expressed by secular changes in bioturbation. This study supports the notion that the agronomic revolution was diachronic, with marginal‐marine and deep‐sea ecosystems lagging behind shallow‐marine settings.

show abstract

Section: Discussionmentioning

confidence: 99%

The interplay of environmental constraints and bioturbation on matground development along the marine depositional profile during the Ordovician Radiation

et al. 2021

View full text Add to dashboard Cite

show abstract

Rosselia ichnofabrics from the Lower Ordovician of the Alborz Mountains (northern Iran): palaeoecology, palaeobiology and sedimentology

Bayet‐Goll

Knaust

Daraei

et al. 2021

Palaeobio Palaeoenv

View full text Add to dashboard Cite

Sandstone mounds from the Ordovician of the Central Iberian Zone, Spain

Jensen

2024

J Iber Geol

View full text Add to dashboard Cite

Sandstone mounds (sensu Bradshaw in Sedimentology 7:149–154, 1966) are sedimentary structures formed by fluid erosion of sands consisting of systems of variously shaped mounds, ridges and gullies preserved on the upper surface of sandstone beds. Sandstone mounds are here reported from the Armorican Quartzite Formation and Marjaliza beds, Extremadura, and the Pochico Formation of Ciudad Real. These are the first reports of this sedimentary structure from the Ordovician of the Central Iberian Zone, southwest Spain, adding to the scarce global record of this sedimentary structure. A literature review reveals no reports of sandstone mounds from rocks younger than the Devonian Period, with the majority coming from Ordovician rocks located on the Gondwanan margin of the Rheic Ocean. It is probable that sandstone mounds exist in younger rocks but secular changes in sediment properties and favourable shelf configuration are alternative explanations for this pattern.

show abstract

Architectural evolution of a mixed-influenced deltaic succession: Lower-to-Middle Ordovician Armorican Quartzite in the southwest Central Iberian Zone, Penha Garcia Formation (Portugal)

Cited by 9 publications

References 77 publications

The interplay of environmental constraints and bioturbation on matground development along the marine depositional profile during the Ordovician Radiation

The interplay of environmental constraints and bioturbation on matground development along the marine depositional profile during the Ordovician Radiation

Rosselia ichnofabrics from the Lower Ordovician of the Alborz Mountains (northern Iran): palaeoecology, palaeobiology and sedimentology

Sandstone mounds from the Ordovician of the Central Iberian Zone, Spain

Contact Info

Product

Resources

About