 | | Journal (article/letter/editorial) | | Pittsburgh, Pittsburgh, Pennsylvania Richat and Semsiyat Domes (Mauritania): Not Astroblemes Abstract: The...The 38-km-diameter Richat Dome, in central Mauritania, has been widely regarded as a possible astrobleme...applies to the much smaller, associated, Semsiyat Dome. Introduction In March 1968, we examined two geologic...to meteoriticists in the Adrar region of central Mauritania, Africa—the Richat and Semsiyat Domes. These...(for example, Freeburg, 1966). Interest in the Richat Dome has been heightened recently by a well-publicized |  | | Report (chapter) | | Africa: the Atar Group carbonates (Taoudeni Basin, Mauritania) ANTONIO MARTÍN-MONGE1*, ROGER BAUDINO1, LUIS...rocks and reservoirs in the Taoudeni Basin in Mauritania and aims to establish a geochemical genetic link...kilometres (Fig. 1). It is well developed in Mauritania and Mali and extends marginally into Algeria...activities were carried out in both Mali and Mauritania, involving several international operators who...first well drilled in the basin was Abolag-1 in Mauritania (drilled by Texaco in 1974), which proved the |  | | Report (chapter) | | Potiguar Rehamna Recife Rio Grande do Norte Rif Richat Dome Rhonda Red Sea Hills Rungwe Saharan Atlas Sardinia...the northern Western Desert of Egypt Triassic dolerite intrusions have been recorded by Schlumberger...the location of older tectonic lineaments. The Adrar Tadhak and Tirkine complexes give R b Sr isochron...Further south, along the margins of the Gao Trough, dolerite dykes have reported K - A r ages of 260-275 Ma...& Guiraud 1993). Nilotic Province. The Uweinat region, at the border of Sudan, Egypt and Libya, is magmatically |  | | Book | | dealing with the present state of knowledge in each region. The Mediterranean domain of North Africa ("Outer...Formations of Western Mauritania. 106 xv EASTERN SAHARA " r. The Depressed region between the Hoggar...XXV XXVI XXVII xxvirr XXIX xxx SOUTHERN MAURITANIA AND WESTERN MAL I 1. The Aouker. 2. F rom Nioro...the Daounas. EASTERN MALI, NIGER AND CHAD 1. The Adrar des Iforas. 2. The Bend of the Niger. 3. The Tilemsi...Tilemsi Valley, T he Asselar Plateau and the Adrar Tiguirirt. The Gao Trough. 4. The Adar Doutchi. 5. The | | | Book | | dealing with the present state of knowledge in each region, with the exception of the Mediterranean area of...dealing with the present state of knowledge in each region. The Mediterranean domain of North Africa (‘Outer...Formations of Western Mauritania. 106 EASTERN 135 SAHARA 1. The Depressed region between the Hoggar... CONTENTS XXI XXII XXIII XXIV SOUTHERN MAURITANIA AND WESTERN MALI 1. The Aouker. 2. From Nioro...the Daounas. EASTERN MALI, NIGER AND CHAD 1. The Adrar des Iforas. 2. The Bend of the Niger. 3. The Tilemsi |  | | Book | | ArabGU. From the geological point of view, Arab region (13,132,327 km2) is dominated by a wide variety...Quaternary. Since the amalgamation of Gondwana, this region formed a continuous ensemble consisting of Archean...are already familiar with the Geology of the Arab Region. Some chapters are research articles and others...Tuareg Shield map that served as the basis for this region in the new 1/10,000,000 scale geological map of...geometry of the lithosphere in a key region of the Hoggar Shield. The region encompasses a shear zone separating |  | | Report (volume) | | geology of Morocco, Algeria, The importance of the region to the petroleum Tunisia, Libya and the western...is, of course, not reflected in the volume This region contains some 4% of the world's of geological literature...including Europe, the USA and SE roleum geology of this region. The main objecAsia, in its importance as a future...material on the oilfields and gas fields of the region. In this regard, we particularly acknowledge the...unique structural history and play types, the Atlas region is assigned a separate sub-section within the Mesozoic-Cenozoic |  | | Book | | Sudbury Ejecta Layer (Paleoproterozoic, Lake Superior Region, North America) . . . . . . . . . . . . . . . ...of uplifted granitic rocks (white to light gray region) is about 40 km in diameter. It is partly surrounded...than shown. The spall zone shown on the right is a region near the surface where large blocks of unshocked...crater rim, as discussed above; but in the lower region (displaced zone), the rock is driven downward and...(Grieve 1987; Melosh 1989) (Fig. 2.4). Rock from this region is not ejected. Roughly half of the volume of the |
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