Investigation of reddening patterns of dune sands — The megabarchans of Al-ghord Lahmar (Khnifiss National Park, South-West of Morocco)

Adnani, M.; Azzaoui, M. A.; Elbelrhiti, Hicham; Ahmamou, M.; Masmoudi, Lhoussaine

doi:10.1016/j.catena.2017.11.008

Cited by 12 publications

(8 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Atlantic Sahara desert is a modern example of a system that consists of patches of bedforms that range up to ca 10 m in height and are separated by somewhat damp, laterally discontinuous interdune flats (Fig. 16C; Sauermann et al ., 2000; Elbelrhiti, 2015; Adnani et al ., 2018).…”

Section: Discussionmentioning

confidence: 99%

“…(B) Modern‐day example of closed interdune flats within White Sands Dune Field, New Mexico (Ewing et al ., 2006; Kocurek et al ., 2007; Pedersen et al ., 2015). (C) The Atlantic Sahara Desert of Morocco's Laayoune‐Boujdour‐Sakia El Hamra region is a modern‐day example of a system that consists of patches of bedforms separated by large, somewhat damp interdune flats (Elbelrhiti, 2015; Adnani et al ., 2018).…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Three‐dimensional bounding surface architecture and lateral facies heterogeneity of a wet aeolian system: Entrada Sandstone, Utah

2022

View full text Add to dashboard Cite

Aeolian deposits form noteworthy reservoirs (for example, Norphlet Formation and Rotliegend Group) in hydrocarbon extraction and carbon capture and storage contexts, but stratigraphic architecture imparts significant heterogeneity. Bounding surfaces result from autogenic and allogenic controls and can represent important changes in dune-field dynamics. To further evaluate the impacts of facies heterogeneity and flow-inhibiting bounding surfaces on reservoir performance and reconstruct ancient erg evolution, the stratigraphic architecture of aeolian systems must continue to be studied at multiple scales. This study pairs traditional methods (for example, measured stratigraphic sections) with advanced technologies (for example, dronederived outcrop models) to precisely resolve the metre to kilometre-scale three-dimensional stratigraphic architecture of wet aeolian Middle Jurassic Entrada Sandstone outcrops located at Rone Bailey Mesa near Moab, Utah, USA. Five facies are identified, primarily based on sedimentary fabrics, and are grouped into three associations named dune, sabkha and sand sheet. Statistical analyses of gamma-ray spectrometer and automated mineralogy data indicate a distinct mineralogical difference between dune (quartz-rich) and sabkha (more feldspathic) packages, suggesting that gamma-ray logs may be used to better predict facies distribution in the subsurface. Seven modelled super bounding surfaces are planar to undulatory, with no perceived spatial trends. Five modelled interdune migration surfaces are undulatory but exhibit an average 0.09°angle of climb roughly parallel to the palaeocurrent direction. Two modelled superposition surfaces are linear to sinuous in plan-view. Laterally discontinuous sabkha packages observed are interpreted to be remnants of closed, damp, interdune flats located between ca 8.5 to 17.0 m tall, sinuous, transverse bedforms or patches of such bedforms. Based on stratigraphic architecture interpretations, the Entrada Sandstone preserves signals of allogenic forcing and localized autogenic bedform cannibalization of the substrate. The findings of this study, some of which are not commonly recognized in wet aeolian facies models, enhance the understanding of erg evolution and can parameterize static models of aeolian reservoirs.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Three‐dimensional bounding surface architecture and lateral facies heterogeneity of a wet aeolian system: Entrada Sandstone, Utah

2022

View full text Add to dashboard Cite

show abstract

“…The western and southwestern parts are marked by the Plio‐Pleistocene platform (marine formation) that was named “Dalle Moghrebienne,” which is composed of sandy limestone (Adnani et al., 2018). The biogeodynamic development began during the Pleistocene to Holocene (Brebion & Ortlieb, 1976).…”

Section: Geological and Paleoclimate Contexts Of Al Haggounia 001mentioning

confidence: 99%

“…At present, the climate, in terms of temperatures and humidity, in the basin is typical of the near semiarid oceanic Atlantic climate. In the analysis of the climate of the Tarfaya coastal basin during the period between 1984 and 2014 (three decades; Adnani et al., 2018), it was determined that the temperature varies between a minimum of 12°C and a maximum of 29°C, with an overall average of 20°C. Precipitation was described as a rare event with an average of 0.45 mm per day and 164 mm per year.…”

Section: Geological and Paleoclimate Contexts Of Al Haggounia 001mentioning

confidence: 99%

Strewn field, mineralogy, and petrology of Al Haggounia 001: A unique enstatite chondrite

Leili,

Chennaoui Aoudjehane,

Devouard

et al. 2024

Meteorit & Planetary Scien

View full text Add to dashboard Cite

In this work, we investigate macroscopic characteristics, magnetic susceptibility, mineralogy, and mineral composition of Al Haggounia 001. The samples were collected during eight field missions in the period between 2015 and 2019. In the strewn field of about 65 km in length, the specimens are found either on the surface or shallowly buried in loose sediments, which rules out the previous suggestions that this meteorite is a fossil meteorite. Macroscopically, the samples exhibit three major lithologies with various colors, porosities, and distributions of oxidized veins. The data obtained using transmitted and reflected light microscopy, scanning electron microscopy, and electron microprobe analysis confirm the macroscopic observations and show a heterogenous distribution of silicates and metal sulfides. Al Haggounia 001 is composed of enstatite, plagioclase, kamacite, taenite, schreibersite, daubreelite, troilite, graphite, sinoite, and silica polymorphs. We identified a new type of chondrules that are flattened and composed of rods of albite and enstatite, as well as elongated nodules of metal and sulfides, in addition to compression fractures in the form of subparallel veinlets. These features presumably reflect the deformation caused by shock. The magnetic susceptibility of Al Haggounia 001 (4.39 ± 0.20) is much lower than that of usual EH (5.48 ± 0.16) and EL (5.46 ± 0.04) chondrites but is in the range of E finds (5.05 ± 0.43). The thermomagnetic and hysteresis measurements are controlled by type, size, distribution of metal‐sulfide nodules, arrangement of oxyhydroxide veins, and weathering. Al Haggounia 001 is an anomalous meteorite with a polymict nature. It records multiple events revealing its unique origin which expends the groups of enstatite chondrites and provides insights into the complex formation and evolution history of their parent body.

show abstract

“…Morocco's ecological policy generated flourishing accomplishments involving the protection of the 11 national parks in Toubkal, Al Hoceima, Eastern High Atlas, Ifarne, Iriqui, Khenifiss, Khenifra, Souss-Massa, Dakhla, Talassementane and Tazekka (Adnani et al 2018). Decision makers in the country took further measures to demonstrate the willingness of the country to contribute internationally to the protection of the planet.…”

Section: Morocco's Environmental Policy In Protected Areasmentioning

confidence: 99%

Tourism, Local Communities and Environmental Governance: Analysis of the Souss Massa Nature Park Governance in Morocco

Boukherouk¹,

Ed-Dali²

2019

AJT

View full text Add to dashboard Cite

Although it has been proven and well integrated in many states, the bottom-up development approaches and the participation of the local population are very recent orientations in Morocco. In this very centralized state, the process is still slow and difficult to implement. However, the new territorial and environmental challenges require local governance where the local community needs to be more involved in decision-making and planning for environmental protection. Through the analysis of the national environment strategy, this paper sheds light on the integration of environmental governance in the Natural Park of Souss Massa (PNSM) in Southwest Morocco linked with tourism actors. Indeed, the development of responsible and ecological tourism takes part in this new orientation and makes it possible to federate several actors with the aim of protecting and safeguarding the natural environment. It highlights the environmental governance mechanisms and frameworks proposed to the local community to participate in the implementation of the strategy. A field study made it possible to recognize the various points of view and the aspirations of the local population to participate in the environmental management of their fragile and threatened space.

show abstract

Investigation of reddening patterns of dune sands — The megabarchans of Al-ghord Lahmar (Khnifiss National Park, South-West of Morocco)

Cited by 12 publications

References 23 publications

Three‐dimensional bounding surface architecture and lateral facies heterogeneity of a wet aeolian system: Entrada Sandstone, Utah

Three‐dimensional bounding surface architecture and lateral facies heterogeneity of a wet aeolian system: Entrada Sandstone, Utah

Strewn field, mineralogy, and petrology of Al Haggounia 001: A unique enstatite chondrite

Tourism, Local Communities and Environmental Governance: Analysis of the Souss Massa Nature Park Governance in Morocco

Contact Info

Product

Resources

About