DOCSLIB.ORG

Discussion of Ophiolites in Northeast and East Africa: Implications for Proterozoic Crustal Growth Journal, Vol

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Discussion of Ophiolites in Northeast and East Africa: Implications for Proterozoic Crustal Growth Journal, Vol Journal of the Geological Society, London, Vol. 148, 1991, pp. 600-606, 2 figs. Printed in Northern Ireland Discussion of ophiolites in Northeast and East Africa: implications for Proterozoic crustal growth Journal, Vol. 147, 1990, pp. 41-57 W. R. Church writes: In discussing the Pan-African geology theeastern margin of theEastern Desert. They do not of Northeast andEast Africa, Berhe (1990) affirms that necessarily cross into Saudi Arabia. On the Saudi Arabian ophiolite decorated lineaments in the Arabian-Nubian side of the Red Sea, the AI Wask, and Farri Group rocks of Shield representsuture zones. The difference of opinion the supposed Yanbu suture may represent parts of a similar between Berhe (1990) and Stern et al. (1989) concerning the ophiolitic sheet exposed as a result of out-of-sequence thrust location of the supposed suture zones of northern Sudan and faulting, with the820Ma old Iqwaq granodiorite repre- southern Egypt, is a clear illustration of the ambiguity that senting a window of older arc basement. The 780 Ma old may arisethrough the uncritical use of thisparadigm. JabalEss ophiolite (Pallister et al. 1988), whichis little Whereas Berhe considers the Sol Hamed-Wadi Onib deformedand also associated with melange and pebbly ophiolite belt to represent in situ oceanic material located mudstone units, may form the uppermost unit of the nappe along a north-south trendingextension of the Saudi pile. Since the 808 Ma (Stern et al. 1989) Sol Hamid-Wadi Arabian Yanbu-Sol Hamed ‘suture’, Stern et al. (1989) link Onib ophiolites are also upthrust tothe south of the thelatter with the east-west trending Allaqi-Heiani regionally south dipping 741 Ma Gerf ophiolite, the relative ophiolite belt, which they consider to be a major east-west age and disposition of the ophiolites could be taken to imply suture ‘extending well into the interiorof North Africa. This that the ophiolitic rocks represent oceanic material formed important difference in opinion is a clear indication of the along the eastern margin of the Hijaz ocean, which would arbitrary nature of suture selectionbased solely onthe therefore now be buried somewhere beneath the ophiolitic distribution of ophiolitic rocks. Furthermore,neither nappesomewhere to the south of the Yanbu-Sol Hamid explanation may be correct. ophiolitebelt. The location of the ocean further south The distribution of ophiolitic rocks in the southern part within the Pan-African likely lies east of the ophiolite of the Eastern Desert and northern Sudan is more likely occurrence at Ingessana, since Shackleton (1988) has argued controlled by the southern Eastern Desert domal culmina- that the Ingessana ophiolite represents an erosional remnant tion, out-of-sequencefaulting, andthe development of of a large thrust sheet. The thrust sheet may have extended zones of intenseductile strain. Within the domal or slid asfar tothe west as the Nuba Hills. Problems culmination, ophiolitic material exposed at lower structural associated with the location of sutures in the Kenya section levels nearAbu Swayel, Gebel Nagy, Um Krush and of the Pan African havebeen discussed by Shackleton perhaps GebelGerf, overlie highly deformed and (1986). metamorphosed pelitic metasedimentscontaining a ‘con- Evenin the Saudi Arabian shield,where terranesare tinental’ Nd isotopesignature (Harris et al. 1984), relatively well defined on the basis of age criteria, and where quartzo-feldspathic gneisses (Umm Tundeiba), hornblende- accretion is most likely to have involved lateral transporta- cummintonite-garnetamphibolites of arcderivation, and tion of arc terranes, it is now apparent that ophiolites are compositionally laminated hornblende-garnet felsic rocks of not the best indicators of terrane boundaries or sense of unknown tectonic affiliation. To the south in Wadi Murra, terrane movement. Taken at face value, the model ages of highly strained mafic schists are succeeded by a southerly- Pallister et al. (1988) indicate thatthe ophiolites of the facing upward-coarsening siltstone-turbidite-pebbly Arabian Nabitah ‘suture’ belong to two different terranes, mudstone-melange sequence, similar in most essential one with an age of c. 850 Ma. (Asir), the other with an age respects tothat described furthernorth in the ophiolitic of c. 750 Ma. (AI Qarah).The Junaynah‘age suture’ nappe pile of the Marsa Alam region of the Eastern Desert therefore appears to transect the Nabitah ‘ophiolite suture’. (El Sharkawi & El Bayoumi 1979; Basta et al. 1986). The In neither case are the ophiolites confined to the terrane clasts of quartzite from which detrital Archean zircons were boundary. first obtained by Dixon (1981) and which have subsequently In the case of the supposed Bir Umq-Thurwah-Nakasib been found elsewhere in the central Eastern desert (Wust et ‘suture’, it is also worth noting that (1) there is clear al. 1987), were taken from pebbly mudstones of the Murra evidence of crustal contamination in the Thurwah ophiolite, melange. The relationship of the melange theto but not in the Bir Umq diorite (Pallister et al. 1988); (2) the discontinuousophiolite belt north of Wadi Allaqi is Thurwah ophiolite could be as young as 810 Ma or as old as unknown, but by analogy with theGhadir region the 870 Ma, and could therefore be 30 Ma older or younger than ophiolites could form an upper ophiolite component of the the Bir Umq diorite; (3) the Thurwah ophiolite lies north of nappe pile. Rather than being a ‘suture’, the Allaqi-Heiani the Labunah thrust, the supposed suture, whereas the Bir ophiolite belt would therefore represent a structural level Umq rocks lie south of the supposed suture; (4) rocks in the within the rim of anarched ophiolitic nappe, or evena Rabigh area to the northof the Thurwah ophiolite are as old pinched syncline separatingthe southern Eastern Desert as 945 f 45 Ma (AI-Shanti et al. 1984); and (5) all definitions culmination from a northern Sudan culmination west of the of a suture along a Bir Umq, Thurwah, Nakasib (Sudan) Hamisana shear zone. The Allaqi-Heiani-Gerf ophiolitic line have ignored the presence of serpentinites on the Sudan belt may skirt the southern Eastern Desert culmination to side of the Red Sea southwest of Mohamed Qol at 20”30’, join up with the ophiolite/melange units cropping out along 36’30‘ (Vail Map of N.E.Sudan, unpublished map 600 Downloaded from http://pubs.geoscienceworld.org/jgs/article-pdf/148/3/600/4892200/gsjgs.148.3.0600.pdf by guest on 27 September 2021 DISCUSSION 601 compilation, 1978). It is therefore far from certain that the 1990) and contrasting geology is found on either side of the Thurwah ophiolite defines the boundary of the Asir terrane; sutures. the boundary could lie underthe c. 740-700 Ma old AI If the Jabal Ess ophiolite formed the uppermost unit of Ays-Furayh-Neferdeib volcano-sedimentary successor ba- the AI Wask nappe pile, then we would expect the former to sin of the Hijaz terrane. contain only a limited portion of an ophiolitesequence. At the eastern edgeof the Saudi Arabian Shield, the Abt However both the Jabal Ess (Shanti & Roobol 1979) and Schist, which contains detrital chromite, garnet, carbonate, the A1 Wask complexes display completea ophiolite muscovite and anatase, was deposited in a basin to the rear succession fromserpentinized ultramafic rocks,cumulate of the western leading edge of the obducted Urd-AI Amar and high level gabbros andan upper metavolcanic and ophiolite. It was subsequently overthrust by the Ar Rayn arc metasedimentarysequence. This suggests that theyrepre- rocks along the AI Amar ‘suture’. The main ocean basin and sent distinct complexes. closure suture therefore likely lie to the east of the Ar Rayn The suggestion that the Ingessana ophiolite could have terrane. extended as far west as the Nuba Mountains implies that the Berhe (1990) suggests that geological differences along Nuba and Ingessana ophiolites arepart of the same the length of the Pan African-Mozambique belt reflects the complex. It is true that the Ingessana complex represents an existence of a relatively narrow belt of oceanic crust, and erosional remnant of a large thrust sheet (Shackleton 1988), consequently a low degree of crustalgrowth, within the but it is unlikely that the Ingessanaophiolite could have Mozambique portion of thebelt. In contrast, Reymer & been detached and transported for over 200 km without the Schubert (1984) and Pallister et al. (1990) have argued that other mafic-ultramafic complexes in the surrounding regions thearc accretion rate of thenorthern Arabian-Nubian being affected. Besides, the Nubaophiolite (Hirdes & shield was excessively high compared to that of the present Brinkmann 1985; Steiner 1987) and the Ingessana ophiolite day.This antipathetic relationship can partin be (Abdel Rahman 1983) separate high-grade metasediments rationalized,however, if it is assumed thatthe missing from low-grade volcano-sedimentary sequence. This means southern arc terranes have migrated laterally northwards to thatthere is acontrast of geology oneither side of the form part of the Arabian-Nubian amalgamated arc system, postulatedsutures as indicated by a recent study of the in thesame way thatthe North AmericanCordilleran Nuba Mts (Abdelsalam & Dawoud 1991). system has amalgamated by lateral arc accretion. In orderto show the ambiguity of suture selection, Church discusses the Bir Umq-Thurwah-Nakasib belt as a 15 June 1990 case study. The Thurwah and Bir Umq ophiolites do show minor differences in geochemistry along strike (Nassief et al. 1984). Pallister et al. (1988) dated zircons fromgabbroic Seife M. Berbe replies: Churchraises two principal rocks of Thurwah complex and found old ages (1250Ma) objections to my recentpaper: (1) ophiolites are not the from two of the fractions. They explained this result as a best indicators of terrane boundaries or sense of terrane product of assimilation of older material during emplace- movement; (2) the Mozambiquebelt incorporates a small ment of the gabbro. Church uses these data to suggest that proportion of oceanic crust implying a low degree of crustal since the Bir Umq diorite does not show evidence of growth in the region.
Load more

Recommended publications
  • ARCHAEOLOGICAL BAYUDA CONFERENCE First International Conference on the Archaeology of the Bayuda Desert in Sudan
    ARCHAEOLOGICAL BAYUDA CONFERENCE First International Conference on the Archaeology of the Bayuda Desert in Sudan 10. - 12. September 2015 Lecture Building of the Cluster of Excellence Religion and Politics Johannisstr. 4 48143 Münster, Germany https://archaeologicalbayudaconference.wordpress.com Contact details: Institute of Egyptology and Coptology Schlaunstr. 2 48143 Münster Germany Tel.: +49 251 83-24537 Fax: +49 251 83-29933 email: [email protected] Prof. Dr. Angelika Lohwasser [email protected] Tel.: +49 251 83-24536 Dr. Johannes Auenmüller [email protected] Tel.: +49 251 83-28467 Mobile: +49 176 56108048 CONFERENCE PROGRAM Thursday, 10. September 2015 From 17:00 Registration Opening of the Conference 18:00 Welcoming addresses by: ANGELIKA LOHWASSER & JOHANNES AUENMÜLLER CORNELIA DENZ, Vice-Rector for International Affairs, University of Münster ABDELRAHMAN ALI MOHAMED, Director General, National Corporation of Antiquities and Museums, Sudan 18:30 Keynote Lecture by RUDOLPH KUPER (Cologne): From Gilf Kebir to Wadi Howar – 35 Years of Archaeological Research in the Libyan Desert 19:30 Reception Friday, 11. September 2015 09:00 – 09:30 Registration 09:30 – 09:45 ANGELIKA LOHWASSER (Münster): Introduction 09:45 – 10:15 M M (Wrocław): IROSŁAW ASOJĆ Stone Age in the Bayuda 10:15 – 10:45 AHMED HAMID NASSR (Khartoum): Regional Diversities of Paleolithic Stone Tools from the Eastern Desert of Lower Atbara River – Comparative Studies between Bayuda Desert and Central Sudan 10:45 – 11:15 Coffee break 11:15
    [Show full text]
  • Detrital Zircon Provenance of North Gondwana Palaeozoic Sandstones from Saudi Arabia
    Geological Magazine Detrital zircon provenance of north Gondwana www.cambridge.org/geo Palaeozoic sandstones from Saudi Arabia Guido Meinhold1,2 , Alexander Bassis3,4, Matthias Hinderer3, Anna Lewin3 and Jasper Berndt5 Original Article 1School of Geography, Geology and the Environment, Keele University, Keele, Staffordshire, ST5 5BG, UK; Cite this article: Meinhold G, Bassis A, 2Abteilung Sedimentologie/Umweltgeologie, Geowissenschaftliches Zentrum Göttingen, Universität Göttingen, Hinderer M, Lewin A, and Berndt J (2021) Goldschmidtstraße 3, 37077 Göttingen, Germany; 3Institut für Angewandte Geowissenschaften, Technische Detrital zircon provenance of north Gondwana 4 Palaeozoic sandstones from Saudi Arabia. Universität Darmstadt, Schnittspahnstrasse 9, 64287 Darmstadt, Germany; Eurofins water&waste GmbH, 5 Geological Magazine 158:442–458. https:// Eumigweg 7, 2351 Wiener Neudorf, Austria and Institut für Mineralogie, Westfälische Wilhelms-Universität doi.org/10.1017/S0016756820000576 Münster, Corrensstraße 24, 48149 Münster, Germany Received: 12 February 2020 Abstract Revised: 18 May 2020 Accepted: 18 May 2020 We present the first comprehensive detrital zircon U–Pb age dataset from Palaeozoic sand- First published online: 24 June 2020 stones of Saudi Arabia, which provides new insights into the erosion history of the East African Orogen and sediment recycling in northern Gondwana. Five main age populations Keywords: U–Pb geochronology; sediment provenance; are present in varying amounts in the zircon age spectra, with age peaks at ~625 Ma, detrital zircon; Palaeozoic; north Gondwana; ~775 Ma, ~980 Ma, ~1840 Ma and ~2480 Ma. Mainly igneous rocks of the Arabian– Saudi Arabia Nubian Shield are suggested to be the most prominent sources for the Ediacaran to middle Tonian zircon grains. Palaeoproterozoic and Archaean grains may be xenocrystic zircons or Author for correspondence: Guido Meinhold, Email: [email protected] they have been recycled from older terrigenous sediment.
    [Show full text]
  • Applications of Orbital Imaging Radar for Geologic Studies in Arid Regions: the Saharan Testimony
    Applications of Orbital Imaging Radar for Geologic Studies in Arid Regions: The Saharan Testimony Mohamed G. Abdelsalam, Cordula Robinson, Farouk Elgaz, and Robert J. Stem Abstract can penetrate dry sand and collect images of shallow sub-sur- The multi-frequency and multi-polarization Shuttle Imaging face features in arid regions such as the eastern Sahara. The arid Radar (SIR)-C/X Synthetic Aperture Radar (SAR) data collected climate prevents development of extensive soil and vegetation in 1994 aboard two flights of the Shuttle Endeavour constitute cover which otherwise obscures the returning radar signal from a milestone in imaging of deserts from space. The data are geologic features. Furthermore, the absence of moisture maxi- here used to explore the eastern Saham, including lithological mizes the depth of radar penetration in the well-sorted sand and structural mapping, geomorphological studies, and min- cover and enables imaging of shallow (up to 2 m) sub-surface eral exploration. The SIR-C/X-SAR images in this environment features. are generally found to be (1) less useful for lithological This presentation discusses the importance of orbital mapping than orbital visible and near infrared (VNLA)images, imaging radar in geologic studies in arid regions based on our except where rock types weather differently to produce varying experience in the eastern Sahara of North Africa. First, we out- roughness levels; (2) superior to orbital vm images for line the evolution of orbital imaging radar systems and summa- structural mapping in areas of subdued relief or where rize concepts that are important in understanding and inter- structures are partially covered by dry sand, as well as in preting radar images.
    [Show full text]
  • Angelika Lohwasser Tracks in the Bayuda Desert. the Project 'Wadi
    Originalveröffentlichung in: Frank Förster und Heiko Riemer (Hg.), Desert Road Archaeology in Ancient Egypt and Beyond (Africa Parehistorica 27), Köln 2013, S. 425-435 Angelika Lohwasser Tracks in the Bayuda desert. The project 'Wadi Abu Dom Itinerary' (W.A.D.I.) Abstract From the archaeological point of view, the Bayuda desert is an unknown part of the northern Sudan. The pro­ ject 'Wadi Abu Dom Itinerary' focuses on the investigation of the so­called 'King's Road' between the two capitals of the kingdom of Kush, Meroe and Napata. The journey between these two centres is repeatedly mentioned in Napatan royal texts, and the road is considered to be the major trade route through the Bayuda 2 as well. Having now the survey data of altogether 70 km along the road, we began to recognise a pattern in site distribution. The permanent and seasonal settlement sites are concentrated at the wadi banks. Here the four known stone structures, namely Umm Ruweim I and II, Quweib and Umm Khafour, are situated. Al­ though they used to be interpreted as caravansaries, their function is as yet unknown. Near the wadi banks we found remains of huts and sites which we would explain as camp sites of nomads. In the hinterland, the archaeologically discernible human activity is restricted to travelling: we found tethering stones at camel and donkey tracks, sometimes with small fireplaces nearby. In the overall pattern we can very clearly distinguish the 'land for settling' from the 'land for crossing'. Keywords: archaeological survey, 'King's Road', shortcut, trade route, stone structure, northern Sudan, Kush, Napatan period, Meroitic period 1.
    [Show full text]
  • This Report Is Preliminary and Has Not Been Reviewed for Conformity with the U.S
    DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY NEW INFORMATION RESOURCES OF THE U.S. GEOLOGICAL SURVEY LIBRARY SYSTEM NUMBER 23 March 1988 OPEN-FILE REPORT 88-400-C This report is preliminary and has not been reviewed for conformity with the U.S. Geological Survey editorial standards 1988 INTRODUCTION New Information Resources is a list of new earth science materials recently acquired and cataloged by the U.S. Geological Survey. It is based on the accessions list acquired through our participation in the national OCLC on-line cataloging system. Due to technical reasons two separate lists are created. The first is an alphabetical list by main entry. These entries were assigned unique USGS subject headings that do not print in the OCLC system. They are therefore arranged alphabetically by main entry. The second list is by subject heading. It is subarranged by main entry. Each entry usually consists of four elements: subject, author/titie, imprint, and call number. EXAMPLE: Subject : EARTHQUAKES TENNESSEE COVINGTON. Author/title: Metzger, Ann Garrecht. Covington, TN earthquake, February, 1981 . Imprint: Memphis : Tennessee Earthquake Information Center, Memphis State University, 1981. Call number: S(239) Sp32 no. 5 Call numbers prefixed with "M" indicate an item is part of the map collection: M(410)4 B148s Call numbers ending with D only, MP only, or F only, indicate that one of these regional libraries, Denver, Menlo Park, or Flagstaff, is the sole holder of an item: 210(252) H178m D only Occasionally an item will not be assigned a call number, receiving instead an alpha abbreviation, such as PAM, i.e pamphlet, or qPAM indicating an oversize pamphlet.
    [Show full text]
  • Desert Road Archaeology in Ancient Egypt and Beyond
    “Long-range desert travel by donkey or camel was a daring venture in the ancient world, and losing your way could prove just as fatal as losing your waterskin ...” Recent exploration has revealed an amazing network of ancient roads and paths crossing the forbidding Saharan desert. This evidence broadens scientific horizons and launches a fascinating new field of archaeological research. Frank Förster & Heiko Riemer (eds.) Desert Road Archaeology in Ancient Egypt and Beyond AFRICA PRAEHISTORICA 27 Köln: Heinrich-Barth-Institut, 2013 584 pages, hardcover and half-linen-bound ISBN 978-3-927688-41-4 Price 78.- Euro, plus package and postage order from our www.hbi-ev.uni-koeln.debookshop Foreword by Steven E. Sidebotham Introduction Heiko Riemer & Frank Förster Ancient desert roads: Towards establishing Stan Hendrickx, Frank Förster & Merel Eyckerman The Pharaonic potery of a new field of archaeological research the Abu Ballas Trail: ‘Filling stations’ along a desert highway Methods, approaches, and historical perspectives András Zboray Prehistoric trails in the environs of Karkur Talh, Jebel Uweinat Olaf Bubenzer & Andreas Bolten Top down: New satellite data and ground- truth data as base for a reconstruction of ancient caravan routes. Exam- Heinz-Josef Thissen Donkeys and water: Demotic ostraca in Cologne as ples from the Western Desert of Egypt evidence of desert travel between Oxyrhynchos and Bahariya Oasis Heiko Riemer Lessons in landscape learning: The dawn of long-distance Per Storemyr, Elizabeth Bloxam, Tom Heldal & Adel Kelany Ancient desert travel and navigation in Egypt’s Western Desert from prehistoric to Old and quarry roads on the west bank of the Nile in the First Cataract region Kingdom times Angelika Lohwasser Tracks in the Bayuda desert.
    [Show full text]
  • In Muslim Sudan
    Downloaded from Nile Basin Research Programme www.nile.uib.no through Bergen Open Research Archive http://bora.uib.no Trade and Wadis System(s) in Muslim Sudan Intisar Soghayroun Elzein Soghayroun FOUNTAIN PUBLISHERS Kampala Fountain Publishers P. O. Box 488 Kampala - Uganda E-mail: [email protected] [email protected] Website: www.fountainpublishers.co.ug © Intisar Soghayroun Elzein Soghayroun 2010 First published 2010 All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means electronic, mechanical, photocopying, recording or otherwise without the prior written permission of the publisher. ISBN: 978-9970-25-005-9 Dedication This book is dedicated to my father: Soghayroun Elzein Soghayroun, with a tremendous debt of gratitude. iii Contents Dedication..................................................................................................... iiv List.of .Maps..................................................................................................vi List.of .plates..................................................................................................vii Preface.......................................................................................................... viii Acknowledgement.........................................................................................xiii 1 The Land, its People and History ...................................... 1 The Physiographic Features of the Country ......................................1
    [Show full text]
  • Sr, Nd Isotopes and Geochemistry of the Bayuda Desert High-Grade
    Precambrian Research 109 (2001) 1–23 www.elsevier.com/locate/precamres Sr, Nd isotopes and geochemistry of the Bayuda Desert high-grade metamorphic basement (Sudan): an early Pan-African oceanic convergent margin, not the edge of the East Saharan ghost craton? Dirk Ku¨ster 1, Jean-Paul Lie´geois * Section of Isotope Geology, Africa Museum, 3080 Ter6uren, Belgium Received 20 January 2000; accepted 30 October 2000 Abstract The high-grade metamorphic basement of the Bayuda Desert is situated at the inferred transition between the juvenile Neoproterozoic mainly greenschist facies Arabian–Nubian Shield (ANS) and the pre-Neoproterozoic mainly amphibolite facies domain of the East Saharan Ghost Craton. New geochemical and Sr–Nd isotope data reveal that this basement in Bayuda constituted a Neoproterozoic oceanic convergent margin succession with limited and probably late input of old material. Within this series, garnet amphibolites and epidote–biotite gneisses have geochemical characteristics of HFSE-depleted tholeiitic basalts and low- to medium-K dacites and rhyodacites, indicating magmatism in an oceanic island arc or back-arc basin environment. This magmatism occurred at 806919 Ma (Sm–Nd 11 WR isochron), similar in age to arc magmatism in the ANS. Leucocratic gneisses, muscovite schists and garnet–biotite schists form the dominant meta-sedimentary rocks of the study area. They were primarily derived from two different sources: volcanogenic sediments from a Neoproterozoic island arc (TDM Nd model ages between 790 and 900 Ma) and terrigeneous sediments from an older continental source (TDM Nd model ages up to 2100 Ma). The volcanosedimentary succession was metamorphosed under amphibolite facies conditions prior to 670 Ma, probably at approximately 700 Ma.
    [Show full text]
  • Desert Locust.Pdf
    No. 515 3 SEPTEMBER 2021 General situation during August 2021 Desert Locust Bulletin Forecast until mid-October 2021 WESTERN REGION: CALM SITUATION. Scattered adults and small-scale breeding in Chad. FORECAST. Small-scale breeding in the northern Sahel of Mauritania, Mali, Niger, and Chad. CENTRAL REGION: THREAT SITUATION. Control operations declined against a Bands likely in inaccessible areas of NE Ethiopia few remaining immature swarms in northern Somalia A few small immature swarms persisted in northern Somalia (11 985 ha treated); no access in northeast Ethiopia where control operations declined. Although small-scale (Afar) where laying, hatching and band formation likely, a breeding was underway in Sudan, Chad and Yemen, no few bands form in the north; scattered adults in Djibouti. breeding was detected in other summer breeding areas Scattered adults and small-scale breeding in Sudan in West Africa and along the Indo-Pakistan border despite with a few groups; scattered adults in western Eritrea. good rains. The primary concern remains in northeast Breeding in Yemen interior and southern coast with Ethiopia where hopper bands are likely to be forming few hopper bands forming; scattered adults elsewhere. but breeding areas cannot be accessed by ground and Isolated adults in Egypt. aerial teams due to insecurity. Similarly, limited breeding FORECAST. A few immature swarms likely to persist in is likely to be underway in parts of northern Ethiopia, but northern Somalia. Band and swarm formation expected limited access has hampered widespread fi eld operations. in northeast Ethiopia and perhaps southern Djibouti Consequently, swarms are likely to start forming in with swarms moving to Eritrea, eastern Ethiopia, and northeast Ethiopia at the end of September and continue northern Somalia for maturation and breeding in October.
    [Show full text]
  • The Small Mounds of Bayuda Region
    The small mounds of Bayuda region Amelia Carolina Sparavigna Dipartimento di Fisica, Politecnico di Torino Corso Duca degli Abruzzi 24, Torino, Italy Abstract : The Great Bend of the river Nile contains the Bayuda region with its volcanic core. Along the river, a fertile strip of land has attracting human settlement for thousands of years and is then rich of archaeological sites. The distribution of the sites near the Nile can be detected using Google Maps imagery. We can see many area covered by small mounds, probably burial sites. Some of the archaeological places are currently under the water of the Merowe Dam. With the satellite imagery, we have a portrait of the area close the dam before the closing of its gates. Keywords : Satellite maps, Landforms, Artificial landforms, Image processing, Archaeology For most of its course, the river Nile flows south to north, but in the heart of the Sahara desert, it turns southwest and flows away from the sea before resuming its northward journey, creating the so-called Great Bend. This turn of the river’s flow is due to the tectonic activity of the Nubian Swell, which is a geologic structural uplift in the northern Africa that trends east-west [1]. This structure is separating the Nile of Egypt from the Sudanese basin of the river. The Nubian Swell has some of its parts that are still active. The river passes the uplift through geologic fractures and faults: four of the six Cataracts of the Nile occur during this passage. The first part of the Great Bend of the river, approximately from the Fourth to the Sixth Cataract, is confining the desert region of Bayuda.
    [Show full text]
  • First Note on the Discovery of a Stratified Palaeolithic Site from the Bayuda Desert (N-Sudan) Within MAG Concession
    2010 Aus der Archäologie Mirosław Masojć First note on the discovery of a stratified Palaeolithic site from the Bayuda Desert (N-Sudan) within MAG concession This communiqué presents the circumstances of the of the Basement Complex. The predominating ele- discovery of a well–preserved Palaeolithic site during ment of the desert’s geological structure is volcanism, this year’s reconnaissance in the Bayuda Desert in especially in its northern part built from Mesozoic Sudan (2010), when initial prospection of the site and basalt rocks of volcanic origin as well as from grani- its vicinity was carried out and preliminary probing tes, gneisses and amphibolites (Rahaba Series). The was made. southern part of the Bayuda (south of the Mero- The site was discovered in the Bayuda Desert we – Atbara line) is made from Cretaceous Nubi- by the team from the Archaeological Museum in an Sandstone Formation2 with numerous volcanic Gdańsk, Poland (MAG) led by Henryk Paner. The cones still visible in the landscape. Due to abundance prospection in the Bayuda began in 2009, following and easy accessibility of volcanic and sedimentary the concession granted by the Director General of rock the Bayuda was a perfect source of raw material the National Corporation for Antiquities and Muse- for prehistoric communities. ums (NCAM), Sudan. The concession covers an area of some 140,000 km2, excluding all the sites situated in the Nile Valley and at its edges, as well as any sites or areas earlier allotted to other expeditions. The aim of the project’s first phase is to con- duct an initial reconnaissance of the region in order to gain a general picture of its settlement history.
    [Show full text]
  • Symbolism and Their Meanings in the Little Prince a Thesis
    SYMBOLISM AND THEIR MEANINGS IN THE LITTLE PRINCE A THESIS By: Tiffany Yunita Student Number: 13.80.0044 ENGLISH DEPARTMENT FACULTY OF LANGUAGE AND ARTS SOEGIJAPRANATA CATHOLIC UNIVERSITY SEMARANG 2017 SYMBOLISM AND THEIR MEANINGS IN THE LITTLE PRINCE A Thesis Presented as a Partial Fulfillment of the Requirement to Obtain the Bachelor Degree in the English Literature Study Program By: Tiffany Yunita Student Number: 13.80.0044 ENGLISH DEPARTMENT FACULTY OF LANGUAGE AND ARTS SOEGIJAPRANATA CATHOLIC UNIVERSITY SEMARANG 2017 Gravity explains the motions of the planets, but it cannot explain who sets the planets in motion -Isaac Newton- v ACKNOWLEDGEMENT Good life is one peaceful inside. Life is about karma. So, first of all, I should be thankful to the Universe which leads every movement in my life, and to the nature which gives me a good life. I just want to say to this to everyone who reads this shabby thesis: Love each other since the time and the place where we live right now is a messy world, a world which is full of hatred and prejudice. This personal message and selfish point of view are things that encourage me to finish writing this thesis. Secondly, I would thank my family that gives me the happiest moment in my life, especially to my loveable nephews: Dylan, Darryl, Reynard, and my only one niece Gwen. You all, with your small smiles and hands have shown me how colorful the world is. You make me want to be a great aunty for you. I would also extend my sincere gratitude to B.
    [Show full text]