A palaeoenvironmental reconstruction of the Campanian‒lower Palaeocene succession of the Dakhla Oasis (Western Desert, Egypt): insights from integrated sequence stratigraphy, macrobenthos, and trace fossil analyses

Journal of African Earth Sciences, Journal Year: 2025, Volume and Issue: unknown, P. 105629 - 105629

Published: March 1, 2025

Language: Английский

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Statistical approaches for the identification of the origin mineralization groundwaters: case of the Naama Region, Far West-Algeria

Earth Sciences Research Journal, Journal Year: 2025, Volume and Issue: 28(4), P. 387 - 395

Published: Feb. 13, 2025

Understanding the processes controlling groundwater mineralization is critical for preserving its quality and ensuring sustainable resource management, especially in regions like Naama, Algeria, which rely exclusively on groundwater. This faces severe overexploitation high salinity due to climatic factors increasing industrial, agricultural, domestic demands, posing significant challenges long-term usability. Hydrochemical analyses, including graphical methods multivariate statistical tools, were employed investigate chemistry mechanisms influencing Naama region. The results revealed a relatively homogeneous distribution of samples, categorized into three hydrochemical groups. These groups are primarily dominated by calcium magnesium chloride sulfate waters, influenced geological characteristics region, such as gypsum-saline formations Upper Cretaceous Triassic clay-gypsum-saline diapirs, further impacted inverse ion exchange processes. Group 1 characterized higher proportions bicarbonate waters dominance carbonate from Early Jurassic or Miocene, benefiting more dynamic recharge zones. Groups 2 3 exhibit similar chemical compositions, but distinct restricted zones formations, leading emergence waters. Recharge areas associated with also vulnerable anthropogenic pollution. findings highlight importance implementing strict protection measures sensitive ensure preservation this vital face environmental human pressures.

Language: Английский

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Lower Jurassic trace fossil Zoophycos from the Ksour Mountains of northwestern Algeria and their palaeoecological and palaeoenvironmental significance

Palaeoworld, Journal Year: 2023, Volume and Issue: 33(4), P. 1025 - 1043

Published: Aug. 3, 2023

Language: Английский

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Trace fossil association related to the Upper Miocene transgression cycle in the Lower Chelif Basin, NW Algeria

Journal of African Earth Sciences, Journal Year: 2024, Volume and Issue: unknown, P. 105489 - 105489

Published: Nov. 1, 2024

Language: Английский

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Early Cretaceous shifting of Zoophycos in the Ouarsenis Mountains (northwestern Algeria)

Journal of Palaeogeography, Journal Year: 2023, Volume and Issue: 12(4), P. 603 - 623

Published: Aug. 18, 2023

Early Cretaceous succession of the Oued Fodda Formation in Ouarsenis Mountains (northwestern Algeria) is mainly composed marl–limestone alternations, which are subdivided into four informal units (Units 1 to 4), based on distinct lithological, stratonomical, and ichnological features. The analysis reveals a low diversity trace-fossil assemblage, exclusively reported from Units 2 3. ichnoassemblage contains six ichnotaxa (Chondrites intricatus, Ophiomorpha isp., Planolites Thalassinoides Zoophycos brianteus, cauda-galli), among Chondrites most common elements assemblage occur different mud-rich substrates showing bioturbation intensities. development middle part Unit shows high degree (bioturbation index (BI) = 4). specimens large size, between 45 cm 75 width, were interpreted have formed lower offshore environment where oxygenation amount was optimal, sedimentation rates low, benthic food abundant seafloor. Toward upper 2, Zoophycos-bearing levels exhibit less intense (BI 2) contrast Planolites- Chondrites-bearing 3 4. At these levels, displays relatively small, coiled U-shaped spreiten, probably response stressful dysoxic conditions prevailing water bottom. With improved quiet shelf margin 3, organisms recovered, as represented by medium size association with scarce burrows, even if overall intensity very low. combination lithofacies indicates stable outer environments below storm wave base, corresponds classically edge environments, palaeoecological optimal for organisms.

Language: Английский

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First tetrapod swim traces and associated ichnofauna from the Mesozoic of Algeria, North Africa

Ichnos/Ichnos : an international journal for plant and animal traces, Journal Year: 2023, Volume and Issue: 30(2), P. 157 - 171

Published: April 3, 2023

AbstractWe report tetrapod traces and associated ichnofauna from two stratigraphic, dominantly terrestrial levels of the Tiout Formation (Valanginian-latest Albian to lower Cenomanian) in Laghouat Brezina areas, Central Saharan Atlas (Djebel Amour), northwestern Algeria discuss their paleoecological implications. The assemblages display abundant footprints that show similarities with crocodylian swim assigned Hatcherichnus known Jurassic–Cretaceous deposits North America Morocco. However, there is also some similarity shape attributed swimming pterosaurs by different authors. Because isolated materials lack distinct trackways, we leave decision on tracemaker open. majority are tridactyl tetradactyl imprints consisting parallel furrows left claws or buoyant individuals. Tetrapod identified, described, figured herein for first time Mesozoic Algeria. These vertebrate fossil a low-diversity invertebrate marine ichnofauna, including cf. Bergaueria isp., Phycodes Sinusichnus seilacheri, Thalassinoides suevicus. Together body data, fishes non-avian dinosaurs, they indicate diverse animal community populating fluvial system environment influence. Paleoecological paleoenvironmental features add new information ichnoassemblages previously reported 'mid'-Cretaceous Africa.Keywords: Swim tracesinvertebrate ichnofaunacontinental intercalarypaleoecologySaharan AtlasAlgeria AcknowledgementsWe grateful reviewers Martin Lockley Adrian Hunt valuable comments constructive suggestions helped improve preliminary version typescript.Disclosure statementNo potential conflict interest was authors.Additional informationFundingThis work supported General Directorate Scientific Research Technological Development 'DGRSDT' (Algeria).

Language: Английский

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Geo-Heritage and Geo-Tourism Potential of the Saoura Valley: A Field Geology Museum in the Ougarta Range (SW Algeria)

Geoheritage, Journal Year: 2024, Volume and Issue: 16(2)

Published: May 16, 2024

Language: Английский

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