Environmental constraints on the distribution of matground and mixground ecosystems across the Cambrian Series 2–Miaolingian boundary interval in Iran: A case study for the central sector of northern Gondwana

Bayet‐Goll, Aram; Daraei, Mehdi; Geyer, Gerd; Bahrami, Nasrin; Bagheri, Farzaneh

doi:10.1016/j.jafrearsci.2021.104120

Cited by 14 publications

(12 citation statements)

References 60 publications

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“…These recent developments are in line with current observations from both modern and ancient microbial mats of various environments suggesting that MISS‐producing microorganisms are not facies‐dependent, being instead found in any environment where the optimum ecological and taphonomic conditions are attained (e.g. Bailey et al, 2006; Bayet‐Goll & Daraei, 2020; Bayet‐Goll, Daraei, et al, 2021; Davies et al, 2006, 2016; Schieber et al, 2007). In fact, a recent compilation of ancient and modern examples of MISS documented formation of microbial mats in a wide variety of settings, including storm‐ and tide‐influenced shallow‐marine, deep‐marine, and fluvial environments (Davies et al, 2016).…”

Section: Introductionsupporting

confidence: 83%

“…Unlike the Ordovician offshore transition/upper offshore deposits documented in this study in which MISS are absent, similar deposits of early to, more rarely, middle Cambrian age may contain abundant wrinkle structures formed between FWWB and SWB (e.g. Ahn & Babcock, 2012; Bailey et al, 2006; Bayet‐Goll & Daraei, 2020; Bayet‐Goll, Daraei, et al, 2021; Buatois & Mángano, 2012b; Buatois et al, 2014; Calner & Eriksson, 2012; Dornbos et al, 2005; Eoff, 2014; Mata & Bottjer, 2009, 2012). This fact shows that the absence of MISS in the Ordovician shallow‐marine deposits of Iran reflects evolutionary (e.g., overall increase in depth and intensity of bioturbation through time) rather than pure environmental factors.…”

Section: Discussionmentioning

confidence: 61%

“…The distribution pattern of similar MISS in modern and ancient microbial mats in the coastal to shelf environments (e.g. Bayet‐Goll & Daraei, 2020; Bayet‐Goll, Daraei, et al, 2021; Bose & Chafetz, 2009; Buatois & Mángano, 2012b; Buatois et al, 2013; Duperron & Scasso, 2020; Laflamme et al, 2011, 2012; Pan et al, 2013; Shepard & Sumner, 2010) shows that bioturbation plays a major role in the development and preservation of microbial matground‐dominated ecosystems. Most modern microbial mats from shallow marine habitats are preferably found in areas with low amount of sediment mixing and bioirrigation by tracemakers, where due to the presence of harsh environmental stresses, disruption of mat‐fabrics by burrowing and grazing is significantly diminished (Bose & Chafetz, 2009; Gerdes et al, 2000; Schieber et al, 2007; Shepard & Sumner, 2010).…”

Section: Discussionmentioning

confidence: 99%

“…This change in their behavioral strategy allowed them to avoid quick sedimentation and burial (Savrda, 2002). In deltaic environments, especially in distal tidal bars and prodelta (D1–D2), the occurrence of fluid muds and flocculation of clay minerals resulted in the development of soupgrounds, which were highly inhospitable to infaunal organisms (Bayet‐Goll & Daraei, 2020; Bayet‐Goll, Daraei, et al, 2021; Bhattacharya et al, 2020; MacEachern et al, 2005). In particular, fluid muds in prodelta facies may have excluded most suspension feeders, instead leading to dominance of surface grazing and detritus feeding trace fossils ( Monomorphichnus , Helminthopsis , and Gyrochorte ), shallow‐tier structures of deposit feeders ( Teichichnus) , and morphologically simple forms and nonspecialized structures ( Planolites and Palaeophycus ).…”

Section: Discussionmentioning

confidence: 99%

“…Bioturbation is considered one of the main driving forces of ecological and geobiological changes (Bayet‐Goll, Daraei, et al, 2021; Butterfield, 2011; Butterfield, 2017; Erwin & Tweedt, 2012; Mángano & Buatois, 2014; Mángano & Buatois, 2017; Seilacher & Pflüger, 1994; Seilacher, 1999). In particular, the increase in depth and extent of sediment mixing during the agronomic revolution resulted in significant geobiological impacts, such as regeneration of nitrogen and phosphorous to the water column, more efficient organic C transfer from the water column to the substrate and within the sediment, ventilation, and solute transport inside the burrow and into the encased sediment, and advective sediment transport to the surface from below (Boyle et al, 2018; Cribb et al, 2019; Mángano & Buatois, 2014; Mángano & Buatois, 2020; Van de Velde et al, 2018; Zhang et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2021

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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.

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Section: Introductionsupporting

confidence: 83%

Section: Discussionmentioning

confidence: 61%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2021

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Palaeogeographic reconstruction and sequence architecture of the middle‐upper Jurassic successions of Hawraman Basin (NW Iran): Implications for tectono‐depositional processes of the northeastern passive margin of the Arabian Plate

2022

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The middle‐upper Jurassic successions (Sargelu, Najmah, and Gotnia formations) of the NW sector of the Zagros Mountain belt are studied to generate a sequence stratigraphic model that helps to understand the Jurassic tectono‐depositional processes and palaeogeographic reconstructions of the northeastern passive margin of the Arabian Plate. The major geological structures observed in northwestern Iran indicate the predominance of an extensional deformation during the Toarcian to Aalenian owing to the eastern Mediterranean rifting. This extensional regime reached its maximum from the Early to Middle Jurassic, causing the fragmentation/drowning of the long‐lived Triassic to Early Jurassic carbonate platform and the development of the Hawraman intrashelf basin (HIB). Associated changes in marine current dynamics, trophic conditions, and degree of substrate oxygenation led to the bloom of oligotypical biota (Bositra limestones) creating unfavourable conditions for the development of other benthic communities (Sargelu Formation). Later, from the Callovian to Oxfordian, changes in carbonate production types (switch from the Bositra filament facies to the stromatolitic‐thrombolitic boundstones) remarkably decreased the dip angle of the depositional profile (Najmah Formation). A second‐order tectono‐eustatic cycle (a major long‐term transgressive/regressive [T/R] cycle) including six minor short‐term T/R facies cycles (TR1–TR6) is identified in the study area. The development of the T/R facies cycles during the Middle Jurassic (TR1–TR3; give‐up sequences; Sargelu Formation) as a result of combined global eustatic transgression and linear subsidence resulted in drowning and backstepping of the platform. In contrast, the short‐term cycles that developed in the upper Jurassic (TR4–TR6; keep‐up sequences; Najmah and Gotnia formations), following a sea‐level fall, resulted in progressive shallowing of the carbonate platform. This study suggests that extensional deformation of the area reached its peak in the transition of the Early to Middle Jurassic, leading to the creation of HIB, but either decreased or played a subordinate role to eustatic sea‐level variations during the deposition of the TR1–TR3 facies cycles (Bajocian‐Callovian). Changes in tectonic regime from an extensional deformation (Early Jurassic) to cooling subsidence (Middle Jurassic), accompanied by a long‐term transgressive sea‐level trend during the Middle Jurassic, were important factors in the development of anoxic trough environments with the deposition of organic‐rich intervals, represented by the TR1–TR3 facies cycles. Tectonic instability (tectonic uplift plus considerable differential subsidence due to the reactivation of faults) in the eastern margin of the Arabian platform during the Late Jurassic led to the development of the TR4–TR6 facies cycles.

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Cambrian integrative stratigraphy, biotas, and paleogeographical evolution of the Qinghai-Tibetan Plateau and its surrounding areas

Sun,

Zhao

et al. 2024

Sci. China Earth Sci.

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Environmental constraints on the distribution of matground and mixground ecosystems across the Cambrian Series 2–Miaolingian boundary interval in Iran: A case study for the central sector of northern Gondwana

Cited by 14 publications

References 60 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

Palaeogeographic reconstruction and sequence architecture of the middle‐upper Jurassic successions of Hawraman Basin (NW Iran): Implications for tectono‐depositional processes of the northeastern passive margin of the Arabian Plate

Cambrian integrative stratigraphy, biotas, and paleogeographical evolution of the Qinghai-Tibetan Plateau and its surrounding areas

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