Sedimentology and Sequence Stratigraphy of Early Syn-Rift Tidal Sediments: The Nukhul Formation, Suez Rift, Egypt

Carr, Ian D.; Gawthorpe, Rob L.; Jackson, Christopher Aiden-Lee; Sharp, Ian; Sadek, A.

doi:10.1306/111402730407

Cited by 58 publications

(57 citation statements)

References 27 publications

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“…It is unclear if intensely burrowed parts of the shoreface were a long-standing facies belt (i.e., lower shoreface where currents are less intense; Schwartz et al 1997) or if they developed during particular episodes across part or all of the shoreface. Bioturbated sandstone is a common facies of both modern shorefaces (Howard and Reineck 1981;Schwartz et al 1997) and ancient shoreface deposits (Carr et al 2003;Castle et al 2004). …”

Section: Bioturbated Sandstone Faciesmentioning

confidence: 99%

Cambrian Depositional History of the Zanskar Valley Region of the Indian Himalaya: Tectonic Implications

Myrow¹,

Snell²,

Hughes³

et al. 2006

Journal of Sedimentary Research

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A well-preserved Cambrian section in the Zanskar Valley of northern India has previously been interpreted to record the transition from a passive to an active tectonic margin related to Cambrian-Ordovician orogenesis. This interpretation has been used to support the tectonostratigraphic interpretation of other successions across the Tethyan Himalaya. Our detailed paleoenvironmental analysis significantly revises the tectonic and depositional history of these Cambrian deposits: no definitive record of impending Cambrian-Ordovician orogenesis is recorded in these late Middle Cambrian rocks.A critical transition from an , 125-m-thick, stromatolite-bearing carbonate deposit, the Karsha Formation, into shale and sandstone of the Kurgiakh Formation, was interpreted to represent tectonically induced drowning of a carbonate platform. Siliciclastic strata of the Kurgiakh Formation were thought to record deep-water flysch deposition in a tectonically active foreland basin next to an arc-trench system. This interpretation was based on sandstone beds with classic Bouma sequences. We show that these event beds in the Kurgiakh instead contain hummocky cross-stratification, quasi-planar lamination, and combined-flow ripple stratification, all of which reflect deposition in shallow-marine, storm-influenced environments. Thus, although the Karsha carbonate platform may have been drowned, it did not culminate in deep-sea flysch deposition, and this in turn eliminates a major line of evidence linking Kurgiakh deposition to the onset of Cambrian-Ordovician orogenesis. Other aspects of Cambrian-Ordovician deposits of northern India also shed doubt on the proposed link between Kurgiakh sedimentation and the Cambrian-Ordovician orogenic event. First, our improved biostratigraphic database suggests that the transition from the Karsha carbonate to the Kurgiakh Formation may have predated the main phase of Cambrian-Ordovician orogenesis, as recorded by overlying Ordovician molasse, by as much as 20-30 My. Second, published data from the Ordovician molasse indicate northward paleocurrents, which are parallel to those recorded by siliciclastic deposits of the Parahio Formation below the Karsha, and thus are at odds with standard models of foreland basin development for the Cambrian-Ordovician event.Our sedimentological analysis of depositional cycles of the Parahio Formation indicates that these strata record storminfluenced environments from offshore marine to shoreface to fluvial settings. This is at odds with previous paleoenvironmental interpretations that ranged from deep-sea flysch to intertidal deposits. Paleocurrent data for marine and fluvial facies of the Parahio Formation in both Zanskar and the Spiti Valley to the south indicate northeast sediment transport. This supports the view that the Parahio and overlying carbonate of the Karsha Formation record the ancient northern passive margin of India during the Cambrian and that these strata may be distal equivalents of the younger Cambrian deposits of the Lesser Himalaya.

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Section: Bioturbated Sandstone Faciesmentioning

confidence: 99%

Cambrian Depositional History of the Zanskar Valley Region of the Indian Himalaya: Tectonic Implications

Myrow¹,

Snell²,

Hughes³

et al. 2006

Journal of Sedimentary Research

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“…However, while the way in which accommodation changes along the depositional dip of a subsiding basin margin has been fully documented (e.g. Posamentier et al, 1988), comparatively less attention has been paid to the effects on stratal architecture of local basin factors, such as along-strike changes in accommodation in response to shoreline-perpendicular faulting (Gawthorpe et al, 1994;McMurray and Gawthorpe, 2000;Hodgetts et al, 2001;Carr et al, 2003;Jackson et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Tectonic controls on sequence stacking pattern and along-strike architecture in the Pleistocene Mejillones Formation, northern Chile: Implications for sequence stratigraphic models

Cantalamessa

Celma

Ragaini

2006

Sedimentary Geology

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“…The small-scale trough cross-bedding indicate bedform migration in the direction of flow within the channel (Carr et al, 2003).…”

Section: Facies C Low-angle Cross-bedded Sandstonementioning

confidence: 99%

“…Interpretation: The low-angle laminated sandstone-mudstone is interpreted as estuary point-bar deposits, formed by lateral migration of a tidal channel (Reineck, 1972;Carr et al, 2003). The small-scale trough cross-bedding indicate bedform migration in the direction of flow within the channel (Carr et al, 2003).…”

Section: Facies C Low-angle Cross-bedded Sandstonementioning

confidence: 99%

“…The small-scale cross stratification, horizontal lamination and sand-clay interbeds are also represented and are typically associated with the intervening bars, where water depths are less and velocities are low (Turner, 1980). The sand laminae may be deposited during flood and ebb tides, while mudstone laminae were deposited during slack water between tides (Carr et al, 2003). The low-angle planar cross-lamination and upper flow regime horizontal lamination, are typical beach-face structures ( Pearson and Gingras , 2006).…”

Section: Facies C Low-angle Cross-bedded Sandstonementioning

confidence: 99%

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The Ediacaran–Cambrian and Ordovician rocks of Al Qasim Province, Saudi Arabia: Facies, depositional history and regional correlation

Khalifa

2015

Journal of African Earth Sciences

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Sedimentology and Sequence Stratigraphy of Early Syn-Rift Tidal Sediments: The Nukhul Formation, Suez Rift, Egypt

Cited by 58 publications

References 27 publications

Cambrian Depositional History of the Zanskar Valley Region of the Indian Himalaya: Tectonic Implications

Cambrian Depositional History of the Zanskar Valley Region of the Indian Himalaya: Tectonic Implications

Tectonic controls on sequence stacking pattern and along-strike architecture in the Pleistocene Mejillones Formation, northern Chile: Implications for sequence stratigraphic models

The Ediacaran–Cambrian and Ordovician rocks of Al Qasim Province, Saudi Arabia: Facies, depositional history and regional correlation

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