Depositional facies, environments and sequence stratigraphic interpretation of the Middle Triassic–Lower Cretaceous (pre-Late Albian) succession in Arif El-Naga anticline, northeast Sinai, Egypt

El-Azabi, Mounir H.; El-Araby, A.

doi:10.1016/j.jafrearsci.2005.02.005

Cited by 16 publications

(5 citation statements)

References 22 publications

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“…The lithofacies is interpreted as deposits of linguoid, transverse bars and sand waves in the lower flow regime. [23] interpreted similar planar cross bedded sands as sandy bedforms that developed as a result of sand migration under lower flow regime conditions in low sinuosity braided stream. Therefore, the characteristic of the planar bedded fine grained sand marks the lower flow regime and the sand deposition occurred under shallow water conditions.…”

Section: Oke Osho Locationmentioning

confidence: 95%

“…The normal graded conglomerate suggests deposition by current possibly by longitudinal gravelly bars and lag deposits in a braided fluvial setting. The conglomerate probably indicates sedimentation in high energy bedload braided streams [22] [23]. The thin layer of ferruginised sandstone characterised by polygonal cracks (mud cracks) and erosional surface probably represents lowering of the base level which must have led to subaerial exposure and subsequent erosion.…”

Section: Ibonwon-igbonla Locationsmentioning

confidence: 99%

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Depositional Facies and Sequence Stratigraphic Study in Parts of Benin (Dahomey) Basin SW Nigeria: Implications on the Re-Interpretation of Tertiary Sedimentary Successions

Olabode¹,

Mohammed²

2016

IJG

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Detailed fieldwork in parts of the Benin (Dahomey) Basin SW, Nigeria has allowed the recognition of sedimentary successions deposited in different continental depositional environments interpreted as fluvial sedimentation characterised by abandoned channels and subaerial exposure features. The lithofacies recognised are: conglomerates, debris flow deposits, very coarse grained sandstone, ferruginous cross bedded sandstone, siltstone, shale/clay and massive sand. The lithofacies were interpreted in terms of sequence stratigraphic elements with the recognition of sequence boundaries characterised by distinct facies dislocations and subaerial exposures. Four depositional sequences (DS I to DS IV) were identified. Depositional sequences (DS I) exhibited a complete regressive-transgressive cycle comprising LST, TST and HST, while DS II to DS IV were incomplete comprising of sediments interpreted as LST deposits. On the basis of the depositional facies and sequence stratigraphic elements, the sediments in the area of study are interpreted as predominantly of Ilaro Formation while fewer exposures are sediments of the Coastal Plain Sands/ Benin Formation. This observation suggests a re-interpretation of the Tertiary sedimentary successions, which hitherto recognised all the sediments in the area of study as Coastal Plain Sands.

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Section: Oke Osho Locationmentioning

confidence: 95%

Section: Ibonwon-igbonla Locationsmentioning

confidence: 99%

Depositional Facies and Sequence Stratigraphic Study in Parts of Benin (Dahomey) Basin SW Nigeria: Implications on the Re-Interpretation of Tertiary Sedimentary Successions

Olabode¹,

Mohammed²

2016

IJG

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“…This was interpreted as deposits of linguoid, transverse bars and sand waves in the lower flow regime. [22] interpreted similar planar cross bedded sands as sandy bedforms that developed as a result of sand migration under lower flow regime conditions in low sinuosity braided stream. The characteristics of the horizontal bedded coarse grained sandstone suggest deposition by series of broad, shallow, poorly defined short-lived channels.…”

Section: Locations Of Ssdsmentioning

confidence: 95%

“…The characteristics of the horizontal bedded coarse grained sandstone suggest deposition by series of broad, shallow, poorly defined short-lived channels. Deposits of short-lived channels typically resemble sheet deposits, laminated sand sheets and sandy bedforms [22] [23]. The horizontal beds are key characteristics of deposition from suspended sediments.…”

Section: Locations Of Ssdsmentioning

confidence: 99%

Soft Sediment Deformation Structures in the Maastrichtian Patti Formation, Southern Bida Basin Nigeria: Implications for the Assessment of Endogenic Triggers in the Maastrichtian Sedimentary Record

Olabode¹

2016

OJG

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Detailed fieldwork carried out in the southern part of Bida Basin, Nigeria, allowed the documentation of soft sediment deformation structures (SSDS) in the Maastrichtian Patti Formation. The aim of this study is to examine the sedimentary successions, describe and analyse these deformation features, discuss their deformation mechanisms and potential triggers. The Maastrichtian Patti Formation is composed of lithofacies interpreted to have been deposited in tidal and fluvial sedimentary environments. Soft sediment deformation structures recognised in the tidal sediments were clastic dykes, load cast, isolated sand balls, dish-and-pillar structures, convolute lamination, diapiric structures and recumbent folds. Severely deformed cross beds, ring structures, associated sand balls, normal folds and recumbent folds were identified in the fluvial sediments. SSDS recognised were interpreted to have been caused by effects of liquefaction and fluidization. Field observations, facies analysis and morphology of the SSDS indicate that there are relationship between the depositional environments and SSDS. Endogenic processes are considered as the trigger agents and they are represented by rapid sedimentation and overloading, impact of breaking waves, pressure fluctuations caused by turbulent water flow, cyclic stress and current generated by storm waves and changes in water table. The present study did not identify exogenic processes as trigger agent. The occurrence of SSDS in southern Bida Basin strongly favoured a non-tectonic origin but a clear relationship high energy processes in tidal and fluvial depositional environments.

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“…White sandstone sequence, which comprises the recognized glass microspherules and deformed quartz grains builds the upper part of the Malha Formation. The well-marked unconformity in the middle part of Malha formation designates the Jurassic-Early Cretaceous boundary [25]. White sandstone of the Malha Formation was deposited in a distal braided plain, which encompassed numerous broad, shallow branching channels that were undergoing processes of active bed form generation and migration [25].…”

Section: Stratigraphic Position Of the Microspherules And The Host Rocksmentioning

confidence: 99%

Microspherules-Bearing White Sandstone: Implication of Cosmic Impact Event near Jurassic-Cretaceous Boundary in West Central Sinai, Egypt

Badawy¹,

Zayed²,

Shahien³

2016

GEP

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The presence of glass microspherules enclosing relict grains, shattered quartz and silicon carbide in white sandstone beds near the Jurassic-Cretaceous boundary in west central Sinai indicates a cosmic impact event. Characterization of the impact microspherules and proposing a reasonable scenario for their origin are the aims of this work. Field observations, optical, binocular, scanning electron and high-resolution transmitted electron microscopy investigations and chemical analyses were carried out. The study revealed that glass microspherules have high Al2O3 and FeO contents and low CaO and MgO contents. The high content of Al2O3 indicates that the source of microtektite-like microspherules is attributed to the melting of a clay-rich sandstone and carbonaceous matter, while the high content of FeO indicates admixing with projectile matter. The reaction between silica and carbon was carried out under conditions of high temperature (T > 1000˚C) and carbon (C/Si > 1) which resulted in the production of silicon carbide with microdiamond intergrowth. Consequently, this intergrowth is in accordance with the impact origin via rapid condensation and growth within a vapor phase. In spite of the fact that no source crater has been recognized to date in the study area, the authors propose at least a single cosmic impact event scenario for the recorded glass microspherules in west central Sinai. The impact excavated the Paleozoic siliciclastic sedimentary rocks and then the glass microspherules showered the area of study. The deposition of microtektite-like glass particles within the white sandstone beds of the Malha Formation took place in the fluvial plain terrestrial environment. This setting precluded severe post-depositional reworking, yielding preservation of the glass particles in a primary layer. Eventually, lateral migration of the braided channels led to the reworking of the microspherules layer and the spatial dispersal of the shattered quartz. H. S. Badawy et al.54

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Depositional facies, environments and sequence stratigraphic interpretation of the Middle Triassic–Lower Cretaceous (pre-Late Albian) succession in Arif El-Naga anticline, northeast Sinai, Egypt

Cited by 16 publications

References 22 publications

Depositional Facies and Sequence Stratigraphic Study in Parts of Benin (Dahomey) Basin SW Nigeria: Implications on the Re-Interpretation of Tertiary Sedimentary Successions

Depositional Facies and Sequence Stratigraphic Study in Parts of Benin (Dahomey) Basin SW Nigeria: Implications on the Re-Interpretation of Tertiary Sedimentary Successions

Soft Sediment Deformation Structures in the Maastrichtian Patti Formation, Southern Bida Basin Nigeria: Implications for the Assessment of Endogenic Triggers in the Maastrichtian Sedimentary Record

Microspherules-Bearing White Sandstone: Implication of Cosmic Impact Event near Jurassic-Cretaceous Boundary in West Central Sinai, Egypt

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