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| 61 GOVERNMENT OF KENYA MINISTRY OF COMMERCE AND INDUSTRY GEOLOGICAL SURVEY OF KENYA GEOLOGY OF THE ... AREA SOUTH OF MAGADI DEGREE SHEET 58, N.W. QUARTER (with coloured geological map) by B. H. BAKER, B...number concerned. GEOLOGY OF THE AREA SOUTH OF MAGADI DEGREE SHEET 58, N.W. QUARTER (with coloured geological...south of Magadi completes the account of the southern end of the Rift Valley as it occurs in Kenya. The Magadi...Magadi area itself was described by Mr. Baker in Report No. 42 (1958). During the mapping of the continuation |
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| COLONY AND PROTECTORATE OF KENYA GEOLOGICAL SURVEY OF KENYA OF THE MAGADI AREA DEGREE SHEET 51, S.W...item reference number concerned. GEOLOGY OF THE MAGADI AREA DEGREE SHEET 51, S.W. QUARTER (with two coloured...Sc, F.G.S. Geologist \Ç>5U5 FOREWORD The Magadi soda lake is one of the natural wonders of the world...as a whole. As the rocks of the area, apart from lake beds, consist almost entirely of late Tertiary and...mineral deposits was small. Yet Magadi has provided more mineral wealth for Kenya than any other part of the |
 | | Journal (article/letter/editorial) |
| Differentiation Trends in Tertiary to Recent Lavas of Kenya* By J. B. WRIGHT ABSTRACT The distribution of Tertiary...Tertiary to Recent lavas in part of south-west Kenya is outlined, and attention drawn to the predominance...Rift Valley, which contrasts with the Pliocene olivine basalt-trachytecomendite association predominating...extensive Pleistocene trachytes differentiated from an olivine basaltic parent. Plots of normative feldspathoid...feldspar versus silica, for analysed lavas from Kenya and Tanganyika, are used to illustrate the trends |
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| No. 90 REPUBLIC OF KENYA MINISTRY OF NATURAL RESOURCES Geological Surrey of Kenya GEOLOGY OF THE AMBOSELI...Volcanic Rocks 1. LOWER OLIVINE BASALTS 2. LOWER NEPHELINITES 3. UPPER OLIVINE BASALTS 4. UPPER NEPHELINITES...CORRELATION CHEMISTRY AND PETROGENESIS 3. Amboseli Lake Beds and Fluviatile Deposits 1. SINYA BEDS 2....setting of Kilimanjaro 3. Structures in the Amboseli Lake Beds (i) 64 64 69 69 VH GEOLOGICAL HISTORY ....through the lavas Fig. 3—Distribution of the Lower Olivine Basalts Fig. 4—Borehole sections in the lavas Fig |
 | | Report (chapter) |
| formed within the half grabens and, in these basins, lake sediments were deposited, often intercalated with...half graben rift basins in Lake Tangayika (Rosendahl 1987) and in parts of Kenya, the northern Tanzania basins...in its early stages was probably joined to the Magadi Basin to the north. The maximum depth of the basin...basement derived from seismic refraction data for the Magadi Basin (Birt et al. 1997). Much of the basin is...the Peninj Beds which were deposited in the palaeo-Lake Natron until c.1.2 Ma when the sedimentation was |
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| 67 GOVERNMENT OF KENYA MINISTRY OF NATURAL RESOURCES GEOLOGICAL SURVEY OF KENYA GEOLOGY OF THE KIJABE...covered by the south-east quarter of degree sheet 43 (Kenya) and is bounded by latitudes 0° 3(y and 1 ° 00'...1:250,000. Communications.—The railway line between Kenya and Uganda as well as the tarmacadamized road between...officers of the Provincial Administration and to the Kenya Police during the survey, in particular the latter...route to Mount Kenya and Lake Rudolf, and then in the following year on his return from Lake Rudolf crossed |
 | | Journal (article/letter/editorial) |
| EASTERN RIFT VALLEY IN KENYA COLONY. I. II. III. B. General. The Lake Baringo Basin. (a) Kamasian...Gamblian and later Deposits. Lake Rudolf. (a) The Losodok Hills. (6) The Lake Deposits, (e) Central Island...Island. (Evidence of Fluctuations of Lake Rudolf on Central Island.) (d) North Island. WESTERN RIFT IN...UGANDA. I. General. II. The Lake Edward Basin. (a) The Kaiso Deposits of the Lake Edward Basin. (i) The Kaiso...Kaiso Deposits East of Lake Edward, (ii) The Kaiso Deposits North of Lake Edward, (iii) The Kaiso Deposits |
 | | Journal (article/letter/editorial) |
| the road to Uganda, and came some days later to Lake Albert, the " yawning abyss " of Sir H. M. Stanley...approaches 7,000 feet. This difference is found between Lake Elmenteita and the highest peak of the Aberdare...75 : 1 for the whole region between Lake Baringo and Lake Magadi. It is most instructive to plot a section...from the Indian Ocean to Lake Victoria, crossing the deepest part of the Kenya rift-valley. The distance...000 feet. If a line is drawn on the section, from Lake Victoria (3,700 feet) to sea-level in the Indian |
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| ee 51 F.R. Boyd 63 The fine structure of the basalt-eclogite transition. .................... Keisuke...EVAPORITES Chemistry and origin of the brines of Lake Magadi, Kenya. 2.2.20... sas. esha onenes Hans P. Eugster...237 Saluceyetallizauon temperatures im cearles, Lake, Calitormia. (2 oo RS Ae gnu noedobuocvaunsuecnnermscnssse...kms, where pyroxene is dissolved by garnet, and olivine is transformed to a spinel-like phase. Eclogite...interested in the peridotites composed largely of olivine and pyroxenes. The alumina in these rocks is distributed |
 | | Journal (issue) |
| the Colonies With appende,d summary reports on: Kenya . Uganda • Tanganyika . • • • • • • Northern...Resources COLONIAL GEOLOGICAL ABSTRACTS Part I .-Kenya . • • • • •• Vll ••• Vlll CONTENTS PAGE...selection of these abstracts deals exclusively with Kenya. Papers published since 1950 have been abstracted...massive flows. The parent magma consists of olivine-basalt, usually aphyric or microphyric, but differentiation...abruptly from the surrounding lava plains. Olivine-basalt is the parent magma of both Early and Late |
 | | Journal (article/letter/editorial) |
| to those better known to British geologists in Kenya Colony, and in both areas have received a considerable...2 who described the occurrence of dykes of olivine-basalt, andesite, and phonolite with a bearing of...the coast in a straight line about 80 miles. In Kenya Colony at Mt. Jombo, about 20 miles inland, Gregory...volcanic events which built up Kilimanjaro and Kenya. The present contribution records the occurrence...the region—would pass close to the Jombo Hill in Kenya Colony, previously referred to, and about 15 miles |
 | | Report (chapter) |
| Extrusives (volcanoes characterized by extrusion of basalt) and the Younger Extrusives (formed by more alkaline...in the extreme north, immediately south of the Kenya border, where basaltic lavas from Oldoinyo Sambu...quartzites in the escarpment on the west shores of Lake Natron (Dundas & Awadalla, unpublished). One of...produced abundant alkali basalt lavas. Major extrusions of the alkali basalt –trachyte – phonolite association...Kirikiti and Olorgesaile basalts immediately north in Kenya, extruded at 5.0 to 1.0 Ma (Baker et al. 1972; Fairhead |
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| rift in northern Tanzania near the Kenya-Tanzania border, south of Lake Natron, and was considered for many...East African Rift Valley System, particularly in Lake Natron, that lies close to Oldoinyo Lengai. However...two primary magma types occur at Lengai, one an olivine nephelinite and the other a melilite nephelinite...Maasai, who limited Arab access to the interior of Kenya and northern Tanzania, knowledge of this part of...at the soda works at 10 J.B. Dawson et al. Magadi, 95 km NNE of Oldoinyo Lengai, from which Oldoinyo |
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| MINISTRY OF NATURAL RESOURCES GEOLOGICAL SURVEY OF KENYA GEOLOGY OF THE NAKURU-THOMSON'S FALLSLAKE HANNINGTON...is seen today. From evidence derived mainly from lake sediments intercalated with the volcanic rocks,...Valley (2) Drainage into Lake Baringo and Lake Hannington (3) Drainage into Lake Solai (4) Drainage into...into Lake Nakuru and the surrounding plain (6) Drainage into Lake Elmenteita (7) Drainage into Lake Naivasha...Basalts (i) Felspar-phyric basalts (ii) Augite- and olivine-phyric basalts (iii) Picrite-basalts (iv) Picrites |
 | | Journal (article/letter/editorial) |
| old lacustrine beds from the neighbourhood of Lake Magadi, on the borders of British and German East Africa;...Africa; and (6) specimens of soda and silica from the lake itself. The former consist of unconsolidated ash...some fault-scarps and forms narrow ridges in the lake itself. Downloaded from https://www.cambridge.org/core...Stainmoor. The occurrence of Shap Granite and olivine-basalt erratics is indicated on an accompanying map...throughout the Lake Temiskaming areas of crystalline rocks, in the iron-ore region of Lake Timagami, as |
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| unexpected difficulties of transport, a journey to Lake Rudolf, which was included in the Survey programm...Nyeri, thence, skirting the northern flanks of Mt. Kenya, to Meru and Archer's Post on the northern Uaso...southwards merges into the northern slopes of Mt. Kenya. The lower plain is broken to the north and west...'Valley, not far from the south-eastern corner of Lake Rudolf. App. C. • , Fig. a. The lava flows forming...n1arked gneiss hill region trending north-west towards Lake Rudolf are the most important features -of the western |
 | Sand, L. B., Mumpton, F. A. - Eds. (1978) Natural Zeolites - Occurrence, Properties, Use - A selection of papers presented at Zeolite, 76, an International Conference on the Occurrence, Properties, and Utilization of Natural Zeolites, Tucson, Arizona, June 1976. Pergamon Press, Oxford. | Book |
| Zeolites R. L. Hay Zeolites in Saline, Alkaline-lake Deposits R. C. Surdam and R. A. Sheppard Geological...constituents in the vugs and cavities of almost every basalt and trap rock formation. Here they form beautiful...MUMPTON Fig. 1. Typical occurrence of zeolites 1n a basalt vug. Chabazite from New Mexico. rruneral collectors...materials. Zeolites were sufficiently abundant in basalt cavities for experimental purposes, but there appeared...almost 100% of the entire rock. Hints of such non-basalt, non-igneous NATURAL ZEOLITES: A NEW lNDU STRIAL |
 | | Journal (article/letter/editorial) |
| Universit~t Witwatersrand, 1964. FROTH FLOWS IN KENYA ~y G. J. H. McCALL, University of Western Australia...- wie Phonolite und Trachyte - - finden sich in Kenya in zahlreichen kleinen Vorkommen. Die Vulkanite...a n d s. 1148 G. J. H. McCALL Froth flows in Kenya Der primate Prozel3, der zur heterogenen Ausbildung...zusammengefal3t werden. Abstract A field of volcanic rocks in Kenya includes numerous effusions of fragmental character...incroyable. L'anteur dit que les laves fragmentales de Kenya sent ,,froth-flows" - - des laves 6cumeux. Le proeessus |
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| MAGMATIC EVOLUTION OF THE SOUTHERN PART OF THE KENYA RIFT VALLEY B.H. Baker, R. Crossley and G.G. Goles...DEVELOPMENT OF THE KENYA RIFT L.A.J. Williams 101 SPATIAL AND TEMPORAL VARIATIONS IN BASALT GEOCHEMISTRY...GEOCHEMISTRY IN THE N. KENYA RIFT S.J. Lippard and P.H. Truckle 123 PALEORIFTS RIFT-ASSOCIATED IGNEOUS ACTIVITY...is the major factor with extrusion of tholeiitic basalt occurring near the assumed "center of underlying...fields around the topographic culmination of the Kenya rift (between volcanoes Menengai and Suswa). The |
 | | Book |
| similar to a closed system, as typified by the saline lake basins. The Green River formation, including some... Punchbowl, Manana Island, Ulupau Head and Salt Lake Tuff, natrolite occurs with thomsonite and gonnardite...Lipa (= Bohmisch Leipa), all Bohemia; - in the basalt from Puy de Marman, Puy-de-Dome, France (see also...diorite from Bergen Hill, New Jersey; at Copper Falls, Lake Superior; - in the eleolite-syenite from Magnet...in basic volcanics are: Germany: in the Tertiary basalt of Vogelsberg, Hessen (Hentschel and Vollrath 1977) |
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| Concentric structure in elongate pillows, Amador County, Calif., by W. A. Duffield._______________________________...________________ Ultramafic xenoliths in basalt, Nye County, Nev., by N. J. Trask___-____-__________...in Pliocene lacustrine rocks near Rome, Malheur County, Oreg., by R. A. Sheppard and A. J. Gude 3d. Twinning...Eocene age in the Spanish Peaks area, Las Animas County, Colo., by J. D. Vine_________________________...____________ 94 Structural geology The Second Lake anticline A major structure on the northwest limb |
 | | Book (edition) |
| calcareo-siliceous rocks” forming the crest of basalt-covered ridges. He noted (1) that these rocks were...rocks at Kaiserstuhl, Germany. ‘Either xenoliths of basalt or aggregates of silicate species. INTRODUCTION...field work on the Iron Hill complex of Gunnison County, Colorado, in 1912-1913. Although his final results...(1919, 1921) considered the calcite of the Laacher Lake Ausfwiirflinge to be magmatic and indeed called...Bildung analog den Pegmatiten.” Chilwa Island in Lake Chilwa, Nyasaland, was first examined geologically |
 | | Journal (article/letter/editorial) |
| Monchiquite, shonkinite, theralite, tinguaite, olivine jacupirangite TABLE 3. II 33 22 4 1 Petrographical...complexes can be represented by a series varying from olivine and pyroxene rich fractions through melteigite...intrusions and the widespread extrusive and intrusive basalt and dolerites usually referred to as the "Siberian...plugs or stocks corn- salt, dolerite, nepheline basalt, augitite and limburgite. The problem of the genetic...carbonatites there are present apatite-phlogopite-olivine rocks, which form a circular zone around the carbonatite |
 | | Book (edition) |
| opposite New York. (For face of the cliff is the " olivine ledge." description see page 147.) Frontisfiece\...amphibole family mica family tourmaline family olivine family ... g-arnet family ... epidote family...diorite Andesite Gabbro, anorthosite and diabase Basalt Perknite References ••• 268 269 273 274 278 279...(nON-FELDSPATHOIDAI.) ROCKS AND GENESIS —OCCURRENCE Olivine-gabbro and peridotite Peridotite and serpentine... CONTENTS PAGE 300 303 305 307 310 Dlivine-basalt Melilite-basalt Recks containing- lime-garnets Corundum |
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| activity and geology of the northern sector of the Kenya Rift Valley British Geological Survey Research...activity and geology of the northern sector of the Kenya Rift Valley P N Dunkley, M Smith, D J Allen and...activity and geology of the northern sector of the Kenya Rift Valley P N Dunkley, M Smith, D J Allen and...end of the Suguta Valley, looking south-west. The lake is strong ly alkaline and fed by hot springs along...along its western shores. Geographic index Kenya Suf>jecr index Geothermal exploration, geology, volcanism |
