Depositional Modelling of the Upper Mannville (Lower Cretaceous), East Central Alberta: Implications for the Recognition of Brackish Water Deposits

Wightman, Daryl M.; Pemberton, S. George; Singh, Chetna

doi:10.2110/pec.87.40.0189

Cited by 64 publications

(43 citation statements)

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“…The highly bioturbated nature of the sands overlying the discontinuity surface, and, particularly, the types of burrows, including Thalassinoides, Ophiomorpha, Diplocraterion, Planolites, and possibly Teichichnus (?) and rare Skolithos, are similar to assemblages recorded in many high energy, shallow marine to marginal-marine environments (Ekdale et al 1984, Wightman et al 1987, Griffis and Suchanek 1991, Pemberton and Wightman 1992, Beynon and Pemberton 1992, Buatois et al 1998, Gingras et al 1999. The fact that these traces continue below the discontinuity surface, where they form an endured horizon having trace fossils characterized by hard walls, is consistent with firm grounds, typical of Glossifungites ichnofacies Frey 1985, MacEachern et al 1992).…”

Section: Sedimentary Processes and Settingssupporting

confidence: 72%

Late Quaternary drainage dynamics in northern Brazil based on the study of a large paleochannel from southwestern Marajó Island

Rossetti

Góes

2008

An. Acad. Bras. Ciênc.

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Marajó Island shows an abundance of paleochannels easily mapped in its eastern portion, where vegetation consists mostly of savannas. SRTM data make possible to recognize paleochannels also in western Marajó, even considering the dense forest cover. A well preserved paleodrainage network from the adjacency of the town of Breves (southwestern Marajó Island) was investigated in this work combining remote sensing and sedimentological studies. The palimpsest drainage system consists of a large meander connected to narrower tributaries. Sedimentological studies revealed mostly sharp-based, fining upward sands for the channelized features, and interbedded muds and sands for floodplain areas. The sedimentary structures and facies successions are in perfect agreement with deposition in channelized and floodplain environments, as suggested by remote sensing mapping. The present study shows that this paleodrainage was abandoned during Late Pleistocene, slightly earlier than the Holocene paleochannel systems from the east part of the island. Integration of previous studies with the data available herein supports a tectonic origin, related to the opening of the Pará River along fault lineaments. This would explain the disappearance of large, north to northeastward migrating channel systems in southwestern Marajó Island, which were replaced by the much narrower, south to southeastward flowing modern channels.

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Section: Sedimentary Processes and Settingssupporting

confidence: 72%

Late Quaternary drainage dynamics in northern Brazil based on the study of a large paleochannel from southwestern Marajó Island

Rossetti

Góes

2008

An. Acad. Bras. Ciênc.

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“…In particular, environments with fluctuating and/or low salinity are bioturbated by animals that tend to construct simple, vertical burrows (Grassle and Grassle, 1974;Benyon et al, 1988;Wightman et al, 1987;. The resultant trace suite is commonly referred to as a salinitystressed suite, or brackish-water assemblage Beynon et al, 1988;Buatois et al, 2005;.…”

Section: Ichnology Of Modern Ihs Depositsmentioning

confidence: 99%

“…Such suites are typical of brackishwater settings (cf. Wightman et al, 1987;Beynon et al, 1988;MacEachern and Pemberton, 1994;Buatois et al, 2005;.…”

Section: Seasonal Controls On Ihs Development -Hydrodynamics and Sedimentioning

confidence: 99%

Seasonal Controls On the Development And Character of Inclined Heterolithic Stratification In A Tide-Influenced, Fluvially Dominated Channel: Fraser River, Canada

Sisulak¹,

Dashtgard²

2012

Journal of Sedimentary Research

106

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“…Although rare, Thalassinoides is also found in deep marine environments (Sheenan and Schiefelbein, 1984;Uchman, 1995;Buatois et al, 2001). Its facies-crossing character is a consequence of the opportunistic behaviour of a tracemaker able to support episodic or constant environmental changes (Wightman et al, 1987;Pemberton and Wightman, 1992). Although the geological record of Thalassinoides is overwhelmingly restricted to marine and brackish-water successions, there is one exception: Shukla et al (2002) reported the presence of Thalassinoides in Quaternary deltaic and fluvial silt and sand deposits, apparently without marine influence.…”

Section: Discussion Of the Depositional Settingsmentioning

confidence: 99%

First evidence of marine influence in the Cretaceous of the Amazonas Basin, Brazil

Rossetti

Netto

2006

Cretaceous Research

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An integrated investigation emphasizing sedimentological and ichnological studies of Cretaceous deposits of the Alter do Chão Formation, exposed in the western Amazonas Basin, was undertaken with the aim of determining depositional environments. Four facies associations attributed to upper shoreface, foreshore, delta mouth bar, and lower/middle shoreface-prodelta depositional environments are recognized. The upper shoreface deposits were deposited by storm flows. They are interbedded with highly bioturbated sandstones displaying Thalassinoides, Planolites and Diplocraterion traces. The foreshore deposits, which are coarser-grained than the shoreface strata, are characterized by tabular sandstones displaying planar or trough cross-lamination/stratification, wavy/flaser lamination, and parallel lamination. These strata also contain an abundance of trace fossils. The delta mouth bar deposits comprise upward-coarsening beds displaying a lobed geometry. The lower/middle shoreface-prodelta settings consist of well-stratified, very fine-grained sandstones and mudstones deposited mostly by storm action. A wavedominated delta system that prograded into a marine-influenced basin is supported for the study area. Therefore, in contrast to previous interpretations, it seems that a widespread Cretaceous transgression resulted in the submergence of large continental areas in the north of Brazil, affecting sediment deposition even in the innermost portions of the intracratonic Amazonas Basin.

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Depositional Modelling of the Upper Mannville (Lower Cretaceous), East Central Alberta: Implications for the Recognition of Brackish Water Deposits

Cited by 64 publications

References 0 publications

Late Quaternary drainage dynamics in northern Brazil based on the study of a large paleochannel from southwestern Marajó Island

Late Quaternary drainage dynamics in northern Brazil based on the study of a large paleochannel from southwestern Marajó Island

Seasonal Controls On the Development And Character of Inclined Heterolithic Stratification In A Tide-Influenced, Fluvially Dominated Channel: Fraser River, Canada

First evidence of marine influence in the Cretaceous of the Amazonas Basin, Brazil

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