Tectonic controls on late Cambrian-Early Ordovician deposition in Cordillera oriental (Northwest Argentina)

Vaucher, Romain; Vaccari, N. Emilio; Balseiro, Diego; Muñoz, Diego F.; Dillinger, Antoine; Waisfeld, Beatriz G.; Buatois, Luís A.

doi:10.1007/s00531-020-01879-9

Cited by 20 publications

(12 citation statements)

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“…The early Palaeozoic Northwest Argentina Basin is a retroarc foreland basin developed along the margin of Gondwana [6,8]. Deposition in the peripheral bulge and the back-bulge areas took place in a wave-dominated shallow-marine ramp punctuated by tide-dominated valley incisions and, locally, deltaic progradations [6].…”

Section: Results (A) Stratigraphical and Palaeoenvironmental Settingmentioning

confidence: 99%

“…TST deposits accumulated in subtidal sandbars (electronic supplementary material, figure S6 e , g ) separated by interbar areas and intertidal to shallow subtidal channels, interfingering landwards with tidal flat deposits (electronic supplementary material, figure S6 d , f ). Renewed incision at the top has been noted [23], indicating that the PHM palaeovalley is a compound system [16], probably a result of basin uplift [8]. No trace fossils occur in inner estuarine deposits, but rare worm-like burrows and the trackway Diplichnites isp., which is attributed to homopodous arthropods, are recorded in middle estuarine deposits [24].…”

Section: Resultsmentioning

confidence: 99%

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Were all trilobites fully marine? Trilobite expansion into brackish water during the early Palaeozoic

et al. 2021

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Trilobites, key components of early Palaeozoic communities, are considered to have been invariably fully marine. Through the integration of ichnological, palaeobiological, and sedimentological datasets within a sequence-stratigraphical framework, we challenge this assumption. Here, we report uncontroversial trace and body fossil evidence of their presence in brackish-water settings. Our approach allows tracking of some trilobite groups foraying into tide-dominated estuaries. These trilobites were tolerant to salinity stress and able to make use of the ecological advantages offered by marginal-marine environments migrating up-estuary, following salt wedges either reflecting amphidromy or as euryhaline marine wanderers. Our data indicate two attempts of landward exploration via brackish water: phase 1 in which the outer portion of estuaries were colonized by olenids (Furongian–early late Tremadocian) and phase 2 involving exploration of the inner to middle estuarine zones by asaphids (Dapingian–Darriwilian). This study indicates that tolerance to salinity stress arose independently among different trilobite groups.

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Section: Results (A) Stratigraphical and Palaeoenvironmental Settingmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Were all trilobites fully marine? Trilobite expansion into brackish water during the early Palaeozoic

et al. 2021

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“…Tidal shorefaces interpreted from the rock record (Table 1) have been identified either by recognizing the interbedding of clear tidal and wave/storm signatures in the deposits (Basilici et al 2012;Wei et al 2016;Bádenas et al 2018;Kalifi et al 2020;Sleveland et al 2020) and/or by documenting tidal modulation of wave processes (Smosna and Bruner 2016;Vaucher et al 2017Vaucher et al , 2018aVaucher et al , 2020MacNaughton et al 2019;Angus et al 2020). Tidal signatures used in these studies include tidal bundles, herringbone structures, lenticular, wavy, and flaser bedding, and mud drapes (Fig.…”

Section: Rock Record Expressions Of Tidal Shorefacesmentioning

confidence: 99%

“…It is in such limited-energy systems that the defining characteristics of tidal shorefaces (see Sections 2.1 and 3) are most likely to be preserved, enabling their identification. Tidal shorefaces have been described from the rock record in foreland (Basilici et al 2012;Kalifi et al 2020), pre-rift (Wei et al 2016), syn-rift (Bádenas et al 2018), post-rift (Smosna and Bruner 2016;Vaucher et al 2017;Sleveland et al 2020), and extensional (Angus et al 2020;Vaucher et al 2020) basins, as well as the margins of an epeiric sea (Table 1; MacNaughton et al 2019). Although no general consensus exists for the type of basins in which tidal shorefaces are preserved, there is the potential for tidal shorefaces to develop more regularly on the margins of semi-enclosed basins with a tapered basin morphology that can amplify tidal currents (Dalrymple and Padman 2019).…”

Section: A Refined Model For Tidal Shorefacesmentioning

confidence: 99%

“…We compare and contrast two closely related tidal-shoreface variants, open-coast tidal flats (OCTF) and tidally modulated shorefaces (TMS), both of which have been proposed for mixed wave-tide coastlines. Over the past 10 years, deposits interpreted as either OCTF or TMS have been described from the sedimentary record and this literature is summarized and compared to the original models (Table 1; Basilici et al 2012;Smosna and Bruner 2016;Wei et al 2016;Vaucher et al 2017Vaucher et al , 2020Bádenas et al 2018;MacNaughton et al 2019;Angus et al 2020;Kalifi et al 2020;Sleveland et al 2020). We then propose a unified model for tidal shorefaces taking into account the multiple variants described so far.…”

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Hutchison Medallist 1. Wave-Dominated to Tide-Dominated Coastal Systems: A Unifying Model for Tidal Shorefaces and Refinement of the Coastal- Environments Classification Scheme

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Vaucher

Yang³

et al. 2021

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Coastal depositional systems are normally classified based on the relative input of wave, tide, and river processes. While wave- through to river-dominated environments are well characterized, environments along the wave-to-tide continuum are relatively poorly understood and this limits the reliability and utility of coastal classification schemes. Two tidal shoreface models, open-coast tidal flats (OCTF) and tidally modulated shorefaces (TMS), have been introduced for mixed wave-tide coastal settings. Following nearly two decades of research on tidal shorefaces, a number of significant insights have been derived, and these data are used here to develop a unified model for such systems. First, OCTFs are components of larger depositional environments, and in multiple published examples, OCTFs overlie offshore to lower shoreface successions that are similar to TMS. Consequently, we combine OCTFs and TMSs into a single tidal shoreface model where TMS (as originally described) and TMS-OCTF successions are considered as variants along the wave-tide continuum. Second, tidal shoreface successions are preferentially preserved in low- to moderate-wave energy environments and in progradational to aggradational systems. It is probably difficult to distinguish tidal shorefaces from their storm-dominated counterparts. Third, tidal shorefaces, including both TMSs and OCTFs, should exhibit tidally modulated storm deposits, reflecting variation in storm-wave energy at the sea floor resulting from the rising and falling tide. They may also exhibit interbedding of tidally generated structures (e.g. double mud drapes or bidirectional current ripples), deposited under fairweather conditions, and storm deposits (e.g. hummocky cross-stratification) through the lower shoreface and possibly into the upper shoreface.The development of the tidal shoreface model sheds light on the limitations of the presently accepted wave-tide-river classification scheme of coastal environments and a revised scheme is presented. In particular, tidal flats are components of larger depositional systems and can be identified in the rock record only in settings where intertidal and supratidal deposits are preserved; consequently, they should not represent the tide-dominated end-member of coastal systems. Instead, we suggest that tide-dominated embayments should occupy this apex. Tide-dominated embayments exhibit limited wave and river influence and include a wide range of geomorphological features typically associated with tidal processes, including tidal channels, bars and flats.

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Storm‐flood‐dominated delta succession in the Pleistocene Taiwan Strait

Vaucher

Dillinger

Hsieh

et al. 2023

The Depositional Record

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Storm‐flood‐dominated deltas are sedimentary systems in which a complex interplay of hydrodynamic processes occurs during storms (e.g. tropical cyclones) due to the coeval action of continental and oceanic processes. This paper reports on a superbly exposed, 135.5 m thick stratigraphic succession of the Pleistocene Cholan Formation exposed along the Da'an River, Taiwan. The sedimentary succession comprises alternating mudstone and sandstone, is mostly fine‐grained, and exhibits multiple event beds that record deposition during tropical cyclones and post‐depositional deformation features produced during earthquakes. Detailed facies analyses reveal that deposition towards the base of the succession occurred in the palaeo‐Taiwan Strait in storm‐flood‐dominated prodelta and delta‐front environments passing upwards into delta‐plain environments. Tropical cyclone beds are encountered throughout the subaqueous storm‐flood delta successions, and are identified by (i) trough cross‐stratified sandstone bedsets with erosive bases that contain both mud clasts and mudstone beds, (ii) sandstone with aggrading wave ripples and (iii) hummocky cross‐stratified sandstone with rare gutter casts filled with coal fragments and shell remains. Tropical cyclone deposits are either top‐down burrowed or capped by massive or laminated mudstone. Seismites are rare and are mainly recognised through soft‐sediment deformation of beds; they do not show evidence of slope failure. Compared to storm‐flood delta successions described elsewhere, the Cholan Formation shows significantly fewer oscillatory‐generated sedimentary structures and gutter casts. This difference is attributed to the Cholan Formation being deposited in and along the margin of a strait characterised by strong shore‐parallel currents and relatively small storm waves due to its position between Taiwan and mainland China. This study refines depositional process interpretations of the Cholan Formation, provides criteria for recognising storm‐flood delta deposits in tectonically active straits with multiple sediment sources fed by steep drainages and short river catchments, and provides additional criteria for recognising tropical cyclone deposits in shallow‐marine settings.

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Tectonic controls on late Cambrian-Early Ordovician deposition in Cordillera oriental (Northwest Argentina)

Cited by 20 publications

References 73 publications

Were all trilobites fully marine? Trilobite expansion into brackish water during the early Palaeozoic

Were all trilobites fully marine? Trilobite expansion into brackish water during the early Palaeozoic

Hutchison Medallist 1. Wave-Dominated to Tide-Dominated Coastal Systems: A Unifying Model for Tidal Shorefaces and Refinement of the Coastal- Environments Classification Scheme

Storm‐flood‐dominated delta succession in the Pleistocene Taiwan Strait

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