 | | Journal (article/letter/editorial) | | Printed in The Netherlands 55 THE S A G A T U RIDGE DIKE SWARM, E T H I O P I A N R I F T M A R G I...ABSTRACT Mohr, P.A. and Potter, E.C., 1976. The Sagatu Ridge dike swarm, Ethiopian rift margin. J. Volcanol...55--71. A swarm of dikes forms the core of the Sagatu Ridge, a 70 km long topographic feature elevated to...the level of the Eastern (Somalian) plateau. The ridge trends NNE and lies about 50 km east of the northeasterly...the flood-lava pile, largely hawaiitic but with trachyte preponderant in the final stages, occurred during |  | | Journal (article/letter/editorial) | | (flood na phonolites in Kenya, rhyolites in Ethiopia) dominated the landscape until ca. 12 Ma. From...(Mid-Miocene Resurgence Phase) impacted the entire region from the Afar margin to Kenya, though activity...Turkana may relate to the Mesozoic rifting in that region which modified the continental lithosphere. Keywords:...Keywords: Rift, magmatism, East Africa, Kenya, Ethiopia, East African Rift System of 1. INTRODUCTION...boundary of the Afar Depression to central Kenya. This region is dominated by the Main Ethiopian Rift and Kenya |  | | Journal (article/letter/editorial) | | o/-normative trachyandesite -* alkali trachyte -* qtz-normative trachyte The high-K and K series correspond...(latite) alkalitrachyte alkalitrachyte Qtz-trachyte Qtz-trachyte 7.2 24.0 13.5 7.8 22.4 22.9 12.9 53.9 12...trlchflndesile I I.~,. b.,,l, l ~ = i l , *Ikll~lrlchyle trachyte bll.lI/ICil, lephrill P. . . . . . . . . . ...be made with other rocks of the Roman Comagmatic Region (Vollmer, 1976; Vollmer and Hawkesworth, 1980)...2). Relative to mafic rock types from the Roman Region, the Roccamonfina primitive tephrites exhibit similar |  | | Journal (article/letter/editorial) | | barely explored desert sink of northeastern Ethiopia, that region has become a mecca for detailed and integrated...modification and diffusion of the typical mid-oceanic ridge-rift process, though in extreme eastern and northern...Along the southern side of Afar, the denudation zone between the Afar floor and the ca 2600-m crest of...system on the Somalian plateau. Afar itself is a region of internal drainage. The eastern margin of Afar...elucidated. Granites within the "Basement Complex" of Ethiopia have yielded K-Ar ages in the range 975--41 5 |  | | Book | | rocks of Weiser (W). The cratonic margin (suture zone) is shown, and the Klamath-Blue Mountains Lineament...Orchards; Wc = Weissenfels Ridge, Cloverdale flow; Wt = Weissenfels Ridge, Tenmile Creek flow; Porn =...elongate basin between the uplift and the suture zone to the north while the Troy syncline formed a basin...normal faults (LKF = Linlekiln Fault), but with a zone of relatively intense deformation close to and trending...= Asotin, WL = Wiessenfels Ridge Lewiston Orchards, WS = Weissenfels Ridge Slippery Creek, E = Esquatzel |  | | Book | | extending mostly between Sudan, Egypt and W. Ethiopia. The potential contributors approached (J. R....Mafic-Ultramafic Magmatism in the Southwest Uganda Region of the African Rift: Implications from Experimental.... . . ... 3 The Crust Under the Canary Islands Region ............. 4 Network of Fractures and Identity...Identity of Vertical Movements in the Canary Islands Region ........................... 4.1 Transoceanic and...elongated troughs located on, or near, the suture zone of the trans-Saharan belt, either on the eastern |
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