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Adrar region

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Series: Geological Society, London, Memoirs
Published: 01 January 2011
DOI: 10.1144/M36.11
EISBN: 9781862394117
... occurs along a continuous, 1300-km-long, narrow belt from the Adrar region of Mauritania to the eastern limit of the Hank in Algeria and comprises thin glacial drift capped widely by periglacial polygonal structures, with more complex glacial sequences preserved in palaeo-depressions. A thicker...
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Journal Article
Published: 01 January 1961
Bulletin de la Société Géologique de France (1961) S7-III (2): 210–215.
...Marie Odile Bongrand; R. Dars; J. Sougy Abstract Wind-faceted pebbles found at the base of the sandy Infracambrian formations of the Adrar region of Mauritania confirm the existence of Infracambrian desert conditions (paleoregs) and suggest the possibility of a new unconformity in the lower part...
Journal Article
Published: 01 January 1949
Bulletin de la Société Géologique de France (1949) S5-XIX (4-6): 409–414.
...Theodore Monod Abstract Discusses the stratigraphic and tectonic relations of Paleozoic formations of the Adrar region, Mauritania, French West Africa. GeoRef, Copyright 2004, American Geological Institute. Reference includes data from Bibliography and Index of Geology Exclusive of North America...
Journal Article
Published: 01 January 1962
Bulletin de la Société Géologique de France (1962) S7-IV (4): 547–554.
...Roman Karpoff Abstract An essentially complete section of the Nigritian is represented in western Adrar Tira'rar, located in the west-central part of the Adrar des Iforas, a mountainous complex of the Sahara region forming an extension of the Ahaggar mountains (Algeria-Sudan border region...
Journal Article
Published: 01 January 1966
Bulletin de la Société Géologique de France (1966) S7-VIII (5): 749–759.
...Maurice Taieb Abstract Two morphologically different regions are distinguished in the Quaternary of the Idjibitene mountains and along the southern border of the Adrar (El Gletat, Mauritania). Along the south and southwest border of the Adrar, deposits resulting from slope erosion are observed...
Image
(a) Simplified map of West Africa (after Peucat  et al .  2005 ) showing th...
Published: 13 November 2013
Figure 1. (a) Simplified map of West Africa (after Peucat et al . 2005 ) showing the location of the West African Craton and the region of study. (b) Geological map of the Reguibat Shield and neighbouring basins. The reference cross-section is represented
Journal Article
Published: 01 January 2003
Bulletin de la Société Géologique de France (2003) 174 (1): 19–32.
... of the sea at the end of the Ordovician and in the early Silurian in a region believed to have been close to the pole. Only the Algerian Sahara is taken in consideration (fig. 1). Some suggestions are made on the role of the glacio-eustatism in the « Silurian » transgression of the Algerian Sahara...
Journal Article
Published: 01 January 2004
Journal of Paleontology (2004) 78 (1): 98–110.
... established for the Mauritanian Adrar area. The Paleontological Society 2004 D evonian fossils of the Hodh region occur in the upper part of a hundred-meter-thick succession of shales and intervening sandstones, which form the upper part of the Paleozoic deposits unconformably overlain by the Meso...
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Journal Article
Published: 01 January 1966
Bulletin de la Société Géologique de France (1966) S7-VIII (2): 218–222.
...Michel Gravelle Abstract In the region of Silet (western Ahaggar, central Sahara) two major volcanic episodes predating the deposition of the Cambro-Ordovician Tassilis sandstone are identified. They are definitely pre-Tremadoc (uppermost Cambrian or lowermost Ordovician) and are probably both...
Journal Article
Published: 01 January 1961
Bulletin de la Société Géologique de France (1961) S7-III (2): 171–173.
...Michel Bouvet; C. Reboul Abstract Four principal type of granite are recognized in the Adrar Tisselliline, a granitic massif intruding the Pharusian (Precambrian) Serouenout basin in the northeastern Ahaggar mountain region, Algeria. These form concentric zones and apparently do not represent...
Journal Article
Published: 01 January 1961
Bulletin de la Société Géologique de France (1961) S7-III (2): 143–151.
... buttes. The intermediate series can be distinguished easily from the Tassilian sandstones and conglomerates on the basis of lithology and structure. There are some similarities to the Nigritian of the Adrar des Iforas region, but in the absence of paleontologic evidence and absolute age determinations...
Journal Article
Journal: Geology
Published: 01 August 2005
Geology (2005) 33 (8): 665–668.
... Four types of magmatic rocks crosscut the Richat dome ( Fig. 1 ). These magmatic rocks are restricted to the structure and are not found in the region beyond the dome. (1) Basalt occurs as subvertical dikes that appear continuous on recent magnetic surveys (T. Abdival, 2005, personal commun...
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Journal Article
Published: 13 November 2013
Geological Magazine (2014) 151 (5): 885–898.
...Figure 1. (a) Simplified map of West Africa (after Peucat et al . 2005 ) showing the location of the West African Craton and the region of study. (b) Geological map of the Reguibat Shield and neighbouring basins. The reference cross-section is represented...
FIGURES | View All (5)
Journal Article
Published: 01 February 1993
Journal of the Geological Society (1993) 150 (1): 89–98.
... was controlled by its mechanical boundary layer, the crust being much less rigid. We suggest that the 5000 km wide Pan-African domain of Saharan Africa, a collage of juvenile and old reactivated basement terranes, has suffered regional continental lithospheric mantle delamination during the early stages...
Image
Detailed south polar paleogeographic reconstruction of western Gondwana dur...
Published: 19 August 2021
Saharan” (Tindouf, Ghadamis, Polignac, Murzuq basins), Pa—Paraná (Brazil, Paraguay, Uruguay), Px—Parecis (Brazil), Pr—Precordillera (western Argentina), Pn—Parnaíba (Brazil), SP—southern Peru, SS—“South Saharan” (Tamesna and Taoudeni basins and Adrar, Hodh regions), Su—Suwannee (Florida, Georgia, United
Journal Article
Published: 01 May 2006
Geological Magazine (2006) 143 (3): 269–299.
...JOBST WENDT; BERND KAUFMANN; ZDZISLAW BELKA; CHRISTIAN KLUG; STEFAN LUBESEDER Abstract The Ahnet and Mouydir regions of southern Algeria are part of one of the world’s largest, almost undeformed exposures of Palaeozoic rocks which exemplify a hitherto poorly known early Variscan development...
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Journal Article
Published: 28 January 2004
Canadian Journal of Earth Sciences (2004) 41 (1): 73–85.
... margin showing Archean to Paleoproterozoic inheritances. This model is based, among others, on ( i ) the prominent role of the Congo craton as demonstrated by the regional extension of external nappes on its northern edge and the concomitant exhumation of the 620 Ma granulitic rocks believed to have...
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Journal Article
Published: 01 March 2016
Bulletin de la Société Géologique de France (2016) 187 (2): 73–82.
... ); – protrusions (domes and lava domes) and extrusions (needles) of trachytes ( fig. 5-C ), trachy-phonolites and phonolites [ Ahmed, 1989] . Fig. 5 Takabar basaltic neck (A), Iragalal basaltic flow(B) and Adrar Mari trachytic extrusion (C). Structural criteria and age dating by the K/Ar method...
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Journal Article
Journal: GSA Bulletin
Published: 01 September 2012
GSA Bulletin (2012) 124 (9-10): 1590–1606.
... on exposures of the outcrops. The main African fossiliferous sections that document the early part of the Paleogene Period include quarries of the Ouarzazate (Adrar Mgorn 1, Adrar Mgorn 1 bis, N’Tagourt 2) and Ouled Abdoun Basins, El Kohol, Glib Zegdou (Gour Lazib), and Chambi localities. The Moroccan...
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Journal Article
Journal: AAPG Bulletin
Published: 01 July 1958
AAPG Bulletin (1958) 42 (7): 1631–1679.
...-months Geologic test drilling About 10 months   Exploration drilling 15 rig-months 15 rig-months CREPS carried on activities over 4 groups of exclusive exploration permits extending along the northern border of the Hoggar from the region of Adrar-Reggane on the Bidonville road...
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