BIOSTRATIGRAPHY OF THE LATE CRETACEOUS/EARLY PALEOCENE SUCCESSIONS AT K.H 5\6 AND K.H 5\8 CORE INTERVAL, WESTERN DESERT OF IRAQ

AbstractThe Maastrichtian–Danian benthic foraminiferal diversity and assemblages through sequence stratigraphy were studied at Dakhla Oasis, Egypt. Benthic foraminifera numbers (BFN), high-flux species and characteristic benthic foraminiferal species and genera distribution are also incorporated to assess palaeobathymetry, palaeoenvironment and palaeoproductivity. All these proxies are then taken together to construct a sea-level curve and interpreted in terms of regional tectonics, climate and eustasy. Data suggest a remarkably highly equitable benthic environment deposited in a brackish littoral and/or marsh setting with moderate (?) to low oxygen conditions and reduced salinity (oligotrophic), possibly due to increased precipitation and terrestrial runoff. The interrupted dominance of calcareous forms and high-organic-flux species suggests occasional marine incursions and high palaeoproductivity, due to local upwelling. The inferred sea-level curve replicates the global eustatic curve and suggests that the curve is more influenced by the prevailing climate and global eustasy rather than by regional tectonics. The post-Cretaceous–Palaeogene boundary displays improvement in the environment in terms of diversity and number of species and specimens, with a marked reduction in the abundance of high-organic-flux species during early Paleocene (Danian) time, indicating a shift from a more mesotrophic open marine environment to much reduced oligotrophic conditions.

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Fission-track geochronologic evidence for Late Cretaceous mylonitization and Early Paleocene uplift of the northeastern Peninsular Ranges, California

Geophysical Research Letters ◽

10.1029/gl011i001p00046 ◽

1984 ◽

Vol 11 (1) ◽

pp. 46-49 ◽

Cited By ~ 14

Author(s):

Roy K. Dokka

Keyword(s):

Late Cretaceous ◽

Fission Track ◽

Early Paleocene ◽

Peninsular Ranges

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The Late Cretaceous–Early Paleocene palaeobathymetric trends in the southwestern Barents Sea — Palaeoenvironmental implications of benthic foraminiferal assemblage analysis

Palaeogeography Palaeoclimatology Palaeoecology ◽

10.1016/j.palaeo.2011.04.021 ◽

2011 ◽

Vol 307 (1-4) ◽

pp. 44-58 ◽

Cited By ~ 27

Author(s):

Eiichi Setoyama ◽

Michael A. Kaminski ◽

Jarosław Tyszka

Keyword(s):

Late Cretaceous ◽

Barents Sea ◽

Foraminiferal Assemblage ◽

Early Paleocene ◽

Assemblage Analysis ◽

Benthic Foraminiferal Assemblage

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Structural setting and tectonic evolution of the Bahariya Depression, Western Desert, Egypt

GeoArabia ◽

10.2113/geoarabia080191 ◽

2003 ◽

Vol 8 (1) ◽

pp. 91-124 ◽

Cited By ~ 1

Author(s):

Adel R Moustafa ◽

Ati Saoudi ◽

Alaa Moubasher ◽

Ibrahim M Ibrahim ◽

Hesham Molokhia ◽

...

Keyword(s):

Late Cretaceous ◽

Tectonic Evolution ◽

Middle Miocene ◽

Middle Eocene ◽

Western Desert ◽

Normal Faults ◽

Surface Mapping ◽

Early Mesozoic ◽

Hydrocarbon Fields ◽

Stable Area

ABSTRACT An integrated surface mapping and subsurface study of the Bahariya Depression aided the regional subsurface interpretation. It indicated that four major ENE-oriented structural belts overlie deep-seated faults in this part of the ‘tectonically stable’ area of Egypt. The rocks of the Bahariya area were deformed in the Late Cretaceous, post-Middle Eocene, and Middle Miocene-and subsurface data indicated an early Mesozoic phase of normal faulting. The Late Cretaceous and post-Middle Eocene deformations reactivated the early normal faults by oblique slip and formed a large swell in the Bahariya region. The crest was continuously eroded whereas its peripheries were onlapped by Maastrichtian and Tertiary sediments. The tectonic evolution of the Bahariya region shows great similarity to the deformation of the ‘tectonically unstable’ area of the northern Western Desert where several hydrocarbon fields have been discovered. This similarity may indicate that the same phases of deformation could extend to other basins lying in the ‘tectonically stable’ area, such as the Asyut, Dakhla, Nuqura, and El Misaha basins.

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Minimizing the Impacts of Desertification in an Arid Region: A Case Study of the West Desert of Iraq

Advances in Civil Engineering ◽

10.1155/2021/5580286 ◽

2021 ◽

Vol 2021 ◽

pp. 1-12

Author(s):

Khamis Naba Sayl ◽

Sadeq Oleiwi Sulaiman ◽

Ammar Hatem Kamel ◽

Nur Shazwani Muhammad ◽

Jazuri Abdullah ◽

...

Keyword(s):

Land Degradation ◽

Vegetation Index ◽

Rainwater Harvesting ◽

Large Change ◽

Cost Effective ◽

Western Desert ◽

Gis Environment ◽

Small Change ◽

Western Desert Of Iraq ◽

Suitable Land

Currently, desertification is a major problem in the western desert of Iraq. The harsh nature, remoteness, and size of the desert make it difficult and expensive to monitor and mitigate desertification. Therefore, this study proposed a comprehensive and cost-effective method, via the integration of geographic information systems (GISs) and remote sensing (RS) techniques to estimate the potential risk of desertification, to identify the most vulnerable areas and determine the most appropriate sites for rainwater conservation. Two indices, namely, the Normalized Differential Vegetation Index (NDVI) and Land Degradation Index (LDI), were used for a cadastral assessment of land degradation. The findings of the combined rainwater harvesting appropriateness map, and the maps of NDVI and LDI changes found that 65% of highly suitable land for rainwater harvesting lies in the large change and 35% lies in the small change of NDVI, and 85% of highly suitable land lies in areas with a moderate change and 12% lies in strong change of LDI. The adoption of the weighted linear combination (WLC) and Boolean methods within the GIS environment, and the analysis of NDVI with LDI changes can allow hydrologists, decision-makers, and planners to quickly determine and minimize the risk of desertification and to prioritize the determination of suitable sites for rainwater harvesting.

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