Middle–upper Cenomanian echinoids from north Wadi Qena, North Eastern Desert, Egypt

Abdelhamid, Marouf A.M.

doi:10.1016/j.cretres.2014.04.010

Cited by 12 publications

(5 citation statements)

References 19 publications

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“…The Qena Formation includes gravel deposits with limestone cobble and heavily weathered soil typical for old terrace deposits [57]. The remaining sediments, outcrops, and paleospecies in fossils have been identified from the Mesozoic Era (Cretaceous period) [58,59] and Paleogene (Paleocene and Eocene epoches) [60,61]. They are reflected in the Cenozoic sediments accumulated in the lacustrine-alluvial fans around the Qena Bend due to the Nile River's evolution in the Neogene; see Figure 2.…”

Section: Prior Workmentioning

confidence: 99%

Recognizing the Wadi Fluvial Structure and Stream Network in the Qena Bend of the Nile River, Egypt, on Landsat 8-9 OLI Images

Lemenkova

Debeir

2023

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With methods for processing remote sensing data becoming widely available, the ability to quantify changes in spatial data and to evaluate the distribution of diverse landforms across target areas in datasets becomes increasingly important. One way to approach this problem is through satellite image processing. In this paper, we primarily focus on the methods of the unsupervised classification of the Landsat OLI/TIRS images covering the region of the Qena governorate in Upper Egypt. The Qena Bend of the Nile River presents a remarkable morphological feature in Upper Egypt, including a dense drainage network of wadi aquifer systems and plateaus largely dissected by numerous valleys of dry rivers. To identify the fluvial structure and stream network of the Wadi Qena region, this study addresses the problem of interpreting the relevant space-borne data using R, with an aim to visualize the land surface structures corresponding to various land cover types. To this effect, high-resolution 2D and 3D topographic and geologic maps were used for the analysis of the geomorphological setting of the Qena region. The information was extracted from the space-borne data for the comparative analysis of the distribution of wadi streams in the Qena Bend area over several years: 2013, 2015, 2016, 2019, 2022, and 2023. Six images were processed using computer vision methods made available by R libraries. The results of the k-means clustering of each scene retrieved from the multi-temporal images covering the Qena Bend of the Nile River were thus compared to visualize changes in landforms caused by the cumulative effects of geomorphological disasters and climate–environmental processes. The proposed method, tied together through the use of R scripts, runs effectively and performs favorably in computer vision tasks aimed at geospatial image processing and the analysis of remote sensing data.

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Section: Prior Workmentioning

confidence: 99%

Recognizing the Wadi Fluvial Structure and Stream Network in the Qena Bend of the Nile River, Egypt, on Landsat 8-9 OLI Images

Lemenkova

Debeir

2023

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“…3 A-D). (Cotteau et al, 1878 ;Abdelhamid, 2014), et dans chacun de ces deux groupes des formes à pétales très réduits et des formes à pétales bien développés. Les juvéniles peuvent parfois prêter à confusion car ils sont toujours plus hauts, plus pointus, et aux pétales proportionnellement plus grands que les adultes.…”

Section: Descriptionunclassified

“…Le genre Archiacia est le plus diversifié des Archiaciidae et est exclusivement cénomanien. Il compte en Afrique du Nord trois espèces principales, A. acuta Thomas & Gauhier 1889, A. sandalina L. Agassiz 1847 et A. palmata Thomas & Gauthier 1889, toutes trois bien représentées dans le Cénomanien de Tunisie (Gauthier, 1898 ;Zaghbib-Turki, 1975 ;Smith & Zaghbib-Turki, 1985), mais A. sandalina est plus largement répandue (Algérie, Egypte, France, Maroc) (Petitot, 1959 ;Cotteau et al, 1878 ;Abdelhamid & Azab, 2003 ;Hewaidy et al, 2014). S'y ajoutent en Egypte A. aegyptiaca Fourtau 1912, A. araidahensis Gauthier, 1901 (proches l'une de l'autre), A. pescameli Gauthier 1901, et A. saadensis Péron & Gauthier 1878(Abdelhamid & Al Qot, 2001.…”

Section: Distribution Paléobiogéographique Des Archiaciidaeunclassified

“…Le genre Claviaster est connu tant au Cénomanien qu'au Turonien, et compte plusieurs espèces en Egypte (Abdelhamid, 2014 ;Ali, 2015) : ?C. araidahensis (Gauthier, 1902), C. comatula (L. Agassiz, 1847), C. cornutus (Agassiz, 1847), et C. costatus Pomel 1883, et une en Tunisie, C. libycus Gauthier 1889(Zaghbib-Turki, 1981.…”

Section: Distribution Paléobiogéographique Des Archiaciidaeunclassified

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Archiacia ramitaensis nov. sp., un nouvel échinide Archiaciidae du Cénomanien de Syrie

Néraudeau

Mouty²

2021

Annales de Paléontologie

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“…Specifically, in terms of stratigraphy and taxonomy, there is a necessity for a contemporary review of these works to facilitate a more precise and current characterization of Africa's echinoid fauna. For the echinoid fauna of the Cretaceous of Egypt, several most recent revisions are available (Abdelhamid 1997(Abdelhamid , 2003(Abdelhamid , 2014Abdelhamid et al 2012Abdelhamid et al , 2016Ali 2015;El Qot 2010;El Qot et al 2009.…”

Section: Introductionmentioning

confidence: 99%

Coniacian (Late Cretaceous) echinoids from the southern Tethyan shelf (NE Algeria) with remarks on their palaeobiology and palaeobiogeography

Schlüter,

Slami,

Benyoucef

et al. 2024

Preprint

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Thirteen echinoid taxa from Coniacian marl-limestone alternations in three sections south and east of Djebel Metlili, on the southwestern margin of the Aures Mountains in northeastern Algeria, are described: Rachiosoma rectilineatum, Phymosoma tamarinense, Phymosoma cf. mansour, Gomphechinus meslei, Coenholectypus serialis, Coenholectypus subcrassus, Parapygus coquandi, Petalobrissus trigonopygus, Petalobrissus rimula, Hemiaster sp., and Mecaster fourneli. Two taxa are newly described herein, Orthopsis metliliae sp. nov. and a new genus and species referred to the family Phymosomatoidae is erected here, Triboporus luluatus gen et sp. nov. A large amount of well-labeled material, comprising 579 specimens, was collected, with the fauna being dominated by the spatangoid Mecaster fourneli. The fauna exhibits typical characteristics of the Tethyan realm at the genus level; however, at the species level, most taxa are restricted to Algeria, with some also found in adjacent countries such as Tunisia and Egypt. The biostratigraphic framework relies on ammonites and inoceramids, indicating a lower to middle Coniacian age.

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Middle–upper Cenomanian echinoids from north Wadi Qena, North Eastern Desert, Egypt

Cited by 12 publications

References 19 publications

Recognizing the Wadi Fluvial Structure and Stream Network in the Qena Bend of the Nile River, Egypt, on Landsat 8-9 OLI Images

Recognizing the Wadi Fluvial Structure and Stream Network in the Qena Bend of the Nile River, Egypt, on Landsat 8-9 OLI Images

Archiacia ramitaensis nov. sp., un nouvel échinide Archiaciidae du Cénomanien de Syrie

Coniacian (Late Cretaceous) echinoids from the southern Tethyan shelf (NE Algeria) with remarks on their palaeobiology and palaeobiogeography

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