Several small echinoid faunules are recorded from the Umbaraaf and Khadrafi members of the Dhalqut Formation, the upper unit of the Albian–Turonian Qamar Group in the eastern part of the Jeza-Qamar ...Basin of Dhofar (southern Oman). In all, 11 species, in nine (sub)genera, are described: Arabicodiadema dhofarense (Roman), Arabicodiadema romani Smith and Jagt n. sp., Heterodiadema libycum (Desor, in Agassiz and Desor), Emiratia raskhaimahensis Ali, Orthopsis miliaris (d’Archiac), Pedinopsis (P.) sphaerica Smith, Simmons and Racey, Pedinopsis (Sinaiopsis) sinaica (Desor, in Agassiz and Desor), Goniopygus dhalqutensis Smith and Jagt n. sp., Coenholectypus excisus (Desor, in Agassiz and Desor), Coenholectypus larteti (Cotteau) and Pliotoxaster dieneri (de Loriol). These novel echinoid data suggest that the Umbaraaf Member extends into the Cenomanian, thus supplementing previous biostratigraphical dating based on foraminifera. The echinoid fauna also suggests correlation of the Umbaraaf and Khadrafi members with strata such as the Natih Formation in north-central Oman, the Mauddud Formation of the northeastern United Arab Emirates, the Galala Formation of the North-Eastern Desert of Egypt and the Wasia Formation of central Saudi Arabia.
The Albian Kharfot Formation is preserved in the eastern margin of the Jeza-Qamar Basin which straddles across the Oman–Yemen border. This study addresses the sedimentological attributes of the ...formation and deduces its depositional setting, cyclicity and relative sea level changes in local (within the basin) and regional (Arabian) contexts. The interaction among siliciclastic influxes, in-situ carbonate production and tectono-climatic controls on the stacking nature of the various lithofacies that build-up the formation is discussed. In the study area, the formation lies unconformably over Barremian–Aptian Qishn Formation and conformably under late Albian–?Turonian Dhalqut Formation. The Kharfot Formation thickens from ~140m in the eastern side of the study area to ~300m at the Oman–Yemen border. It consists of eight lithofacies: Orbitolina-rich marls, peloidal bioclastic packstone, bioclastic mudstone to wackestone, argillaceous, bioclastic floatstone to rudstone, bioclastic rudstone, sandy, peloidal, bioclastic mudstone to packstone, peloidal, bioclastic grainstone and dolostone. The vertical arrangement of these lithofacies defines recurring meter- to decameter-scale, shallowing-upward units deposited on a westward-deepening inner- to outer-ramp setting. Tectonic rejuvenation of the siliciclastic source area was accompanied by warm, humid climatic conditions as suggested by high kaolinitic marls of the Kharfot Fm. and coeval quartz-rich sandstone units (Harshiyat Fm.). The shallowing-upward rhythmic sedimentation of the formation has close resemblance with cycles of the Nahr Umr Formation in northern Oman and partially comparable with the global sea level changes. The Kharfot basin was an intrashelf depression that was part of the much larger Arabian epeiric platform. The latter is defined by a rimmed margin in northern Oman where Al-Hassanat Formation represents platform margin deposits and Nahr Umr Formation representing back-rim intrashelf depression which received fine-grained siliciclastic influx from the land (westward). In southern Oman where Kharfot Formation accumulated, the platform was unrimmed ramp type basin with high fine clastic influx along with elevated carbonate production.
•Lithofacies and depositional environment of the Albian Kharfot Formation, Oman.•Concurrent siliciclastic and carbonate deposition within regional (Arabian) context.•Cyclicity, tectono-eustatic fluctuations and their effect on basin-fill architecture.
Simptoms of anxiety, depression, anger and sexual concern and the role of some demographic characteristic among slovenian youth: a cross sectional study Background: There is some evidence that a more ...elevated level of anxiety and depression is associated with adolescent timing and that depression and anxiety have overlapping symptoms and are conceptually interrelated. Methods: This cross-sectional study investigated the clinical importance and comorbidity rates of some psychological symptoms. The aim was to explore the presence and intensity of the symptoms of anxiety, depression, anger and sexual concern in Slovenian adolescents. The second aim was to determine the relationship between the sociodemographic characteristics of adolescents and the presence of these symptoms. Two hundred and three adolescents between 15 and 20 years of age completed a questionnaire measuring specific symptoms. Results and conclusions: The results of the current study indicate that depressive and anxiety symptoms were found not to differ by gender, age and socioeconomic status. Girls and boys showed similar profiles of correlations for depressive and anxiety symptoms. High level of depressive symptoms, such a feelings of sadness, unhappiness, and loneliness, were associated with increased symptoms of anxiety among boys and girls and both expressed more sexual concerns as well. Anger, angry thoughts, feelings and behaviour were strongly linked to preoccupation with sexual thoughts or feelings for both boys and girls. The findings extend the current knowledge in this area. Identifying and assessing depression and other symptoms are essential to ensuring access to appropriate treatment. PUBLICATION ABSTRACT
A satellite remote sensing technique is demonstrated for generating near surface geological structure data. This technique enables the screening of large areas and targeting of seismic acquisition ...during hydrocarbon exploration. This is of particular advantage in terrains where surveying is logistically difficult. Landsat Thematic Mapper (TM) data and a high resolution digital elevation model (DEM), are used to identify the map outcropping horizons. These are used to reconstruct the near surface structure. The technique is applied in Central Yeman which is characterized by a 'layer-cake' stratigraphic section and low dipping terrain. The results are validated using two-dimensional seismic data. The near surface map images faults and structure not apparent in the raw data. Comparison with the structure map generated from two-dimensional seismic data indicates very good structural and fault correlation. The near surface map successfully highlights areas of potential closure at reservoir depths.
The Mesozoic basins of Yemen have a multiphase history of rift development. Sediments of the ‘Furt Formation’ were deposited as a result of a second, discrete phase of rift activity during the ...Hauterivian to Barremian and unconformably overlie older deposits (A. C. Ellis, H. M. Kerr, C. P. Cornwell and D. O. Williams, 1996, Petroleum Geoscience2, 29–42). The name is taken from the suggested type well, AI Furt-1, where the unit reached its maximum drilled thickness to date, in the Jeza-Howarime Basin. The lithology in the type well predominantly comprises calcareous mudstones with subordinate carbonates. In western Yemen and more marginal settings, the ‘Furt Formation' is dominated by arenaceous facies. Biostratigraphic analysis suggests that the upper and lower limits of the 'Furt Formation' are bounded by stratigraphic breaks. Regional seismic lines suggest and biostratigraphy confirms the extension of the 'Furt Formation' into basin margin areas and other rift basins, supporting the case for regarding the Furt section as a formation in its own right.
The Qishn Formation has been divided on a tripartite basis. The oldest units are the ‘Clastic’ and ‘Lower Carbonate Members’ which are lateral facies and age equivalents. The ‘Clastic Member’ is found in the west of Yemen while the ‘Lower Carbonate Member’ is best developed in the east. The transition between the two is seen in the Jeza-Howarime Basin. The middle unit, the ‘Shale Member’, is a regionally extensive mudstone facies thought to relate to a maximum flooding event. The youngest unit, the 'Carbonate Member', comprises a limestone sequence. The Qishn Formation is unconformably overlain bythe clastics of the Harshiyat Formation and in the extreme east of the Yemen by the carbonates of the Fartaq Formation. The Qishn Formation represents a transition from a rift to a post rift-phase (Ellis et al., 1996).
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Provider: - Institution: - Data provided by Europeana Collections- All metadata published by Europeana are available free of restriction under the Creative Commons CC0 1.0 Universal Public Domain ...Dedication. However, Europeana requests that you actively acknowledge and give attribution to all metadata sources including Europeana
Provider: - Institution: - Data provided by Europeana Collections- Fotografie Júliusa Ježa- All metadata published by Europeana are available free of restriction under the Creative Commons CC0 1.0 ...Universal Public Domain Dedication. However, Europeana requests that you actively acknowledge and give attribution to all metadata sources including Europeana
Provider: - Institution: - Data provided by Europeana Collections- Fotografie Júliusa Ježa- All metadata published by Europeana are available free of restriction under the Creative Commons CC0 1.0 ...Universal Public Domain Dedication. However, Europeana requests that you actively acknowledge and give attribution to all metadata sources including Europeana
Provider: - Institution: - Data provided by Europeana Collections- Fotografie Júliusa Ježa- All metadata published by Europeana are available free of restriction under the Creative Commons CC0 1.0 ...Universal Public Domain Dedication. However, Europeana requests that you actively acknowledge and give attribution to all metadata sources including Europeana
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