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| occur in the carbonate-rich tufts and lavas of Mount Elgon; kaersutite-rich pyroxenites and a suite of...fenitized basement rocks in the caldera flows of Mount Meru, and apparently unique melanocratic hortonolite...nepheline syenites in the central foyaite plug of Mount Kenya. The sTSr/a6Sr ratios indicate mantle origin...elements such as St, Nb, and Zr. The xenoliths from Mount Kenya are cumulate equivalents of the glassy kenyte...kenyte lavas of the mountain; the pyroxenites of Mount Elgon are also cumulates whose predominant titanaugite |
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| Rocks from Kenya 67 A Suite of Hypersthene-bearing Plutonic Rocks in the Meru District, Kenya 1 By WILLIAM... WO years before the 1914-1918 war settlers in Kenya were attracted by an occurrence of mica-bearing...of hills in the southern Meru District, about 34 miles east of Mount Kenya. Interest continued during...Lateritic ironstone. U. TERTIARY Kenyte lavas of the Mount Kenya Suite. • great unconformity ("Mica pegmatites...bojites, biotite-schists and gneisses. There is no clue to the precise |
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| Sub-provinces in the Tertiary to Recent Volcanics of Kenya By J. B. WRIGHT ABSTRACT Three sub-provinces are...southern half of Kenya as follows :— (a) the Miocene phonolite sub-province, (b) the Mount Kenya phonolite/basanite...Available supporting evidence is discussed, both from Kenya and from similar volcanic provinces elsewhere. The...contrasted volcanic associations in southwestern Kenya :— (1) Miocene mela-nephelinites, nephelinites,...sub-provinces covering much of southern Kenya as far north as Mount Elgon :— The Miocene phonolite sub-province |
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| No. 33 COLONY AND PROTECTORATE OF KENYA GEOLOGICAL SURVEY OF KENYA GEOLOGY OF THE NORTH KITUI AREA...and Pleistocene vulcanicity connected with Mt. Kenya and the Nyambeni Range, the area is entirely occupied...Intrusives 2. Post-Basement System Rocks (1) Mt. Kenya Series (2) Tertiary Sediments—Massisini Series (3)...described in this report is situated in central Kenya and is bounded by the equator, latitude 0° 30' S...acid and basic intrusives; (2) rocks of the Mount Kenya series which are represented only by a small |
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| Special Publications Outline of the petrology of the Kenya rift alkaline province B.H. Baker Geological Society...October 28, 2014 Outline of the petrology of the Kenya rift alkaline province B. H. Baker S U M M A R Y...eastern branch of the E African rift system in Kenya and northern Tanzania contains nearly the whole...majority of wellstudied suites of alkaline rocks in Kenya, including some unpublished data. Apart from questions...the province The alkaline volcanic province in Kenya and northern Tanzania is associated with the development |
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| NATURAL RESOURCES GEOLOGICAL SURVEY OP KENYA GEOLOGY OF THE MOUNT KENYA AREA DEGREE SHEET 44 N.W. QUARTER...reference number concerned. GEOLOGY OF THE MOUNT KENYA AREA DEGREE SHEET 44 N.W. QUARTER (with coloured... FOREWORD The geological survey of the area around Mt. Kenya, a dissected volcano which forms Kenya's highest...earlier glaciers. Mr. Baker also shows that Mt. Kenya was formerly covered by an ice cap 400 sq. kms....Series .. .. ' Nyeri Tuff Laikipian Basalts The Mount Kenya Suite (1) The Main Eruptive Episode (a) The lower |
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| NOTE ON THE KAPITI PHONOLITES AND KENYTES OF KENYA COLONY W. CAMPBELL SMITH ROCKS COLLECTED BY W. THESIGER... NOTE ON THE KAPITI PHONOLITES AND KENYTES OF KENYA COLONY BY W. CAMPBELL SMITH WITH NEW CHEMICAL... NOTE ON THE KAPITI PHONOLITES AND KENYTES OF KENYA COLONY By W. CAMPBELL SMITH With new chemical...the strati graphically later (i.e. younger) Mt. Kenya Volcanic Suite. Under the microscope, however, it...Gregory for the lavas around the central plug of Mt. Kenya, of which black glass and large anorthoclase crystals |
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| whole rock isochrons for the Monchique and Mt. Kenya complexes, together with a series of 87Sr/86Sr ratios...lineage is represented in the present study by Mts. Kenya and Kilimanjaro, the "carbonatitic" lineage by Mt...Kisingiri (Rangwa), Jombo Hill, Ruri and Homa Mtn. Mt. Meru, like Moroto in Uganda, shows representatives of...Choice of Samples The samples from Monchique, Mt. Kenya and Jombo Hill include examples of all major rock-types... Rubie (1971) for Rangwa; Baker (1967) for Mt. Kenya, Searle (1952) for Mt. Elgon and Baker (1953) for |
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| minerals in a Quaternary paleosoi sequence, Mount Kenya, East Africa * W. C. MAa~Ey and **W. VOlmSCH...trece amounts of other minerals (e.g. nepheline, biotite, amphibole) are the dctrital components of the...Profile section TV23 (Fig. 1), located m a n end Mount Kenya, located at approxlmately 0°S, 37 ° moraine ridge...forest translUon zone on the western flank of Mount Kenya, East Africa. with extremes to + 19°C a n d -1...addition, a few grains of accessory minerals (e.g. biotite, garnet), were found Scanning electron microscopy |
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| No. 23 COLONY AND PROTECTORATE OF KENYA GEOLOGICAL SURVEY OF KENYA A GEOLOGICAL RECONNAISSANCE OF THE...of ancient rocks, extending between Meru, north-east of Mount Kenya, and Kitui. The quarter-degree areas...ultrabasic intrusives that are so prominent in the Embu-Meru area, and which it was anticipated would continue...Basement System, which are the oldest rocks known in Kenya. Apparently at present no economic significance...the Nyanzian or Kavirondian systems of Western Kenya, which have been valuable for the gold and silver |
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| Neogene volcanics and interbedded palaeosols near Mount Kenya W. C. MAHANEY1*, RENÉ W. BARENDREGT2, MIKE VILLENEUVE3...outcrop c. 40 km SW of Mount Kenya, near the Amboni River north of Mweiga, Kenya along the Nyeri/Thompson...principally trachyandesite and form the base of the Mount Kenya Volcanic Series which, in the early literature...palaeosol profiles are also documented on nearby Mount Kenya, where wellweathered lower palaeosol horizons...climate. Little is known of the volcanic pile of Mount Kenya (Mahaney 1990) apart from that outlined and discussed |
 | | Report (chapter) |
| in the extreme north, immediately south of the Kenya border, where basaltic lavas from Oldoinyo Sambu...Kirikiti and Olorgesaile basalts immediately north in Kenya, extruded at 5.0 to 1.0 Ma (Baker et al. 1972; Fairhead...Survey of Kenya). Straddling the border between Kenya and Tanzania, Shombole lies mainly within Kenya. It is...volcanoes, with its northern slopes descending into Kenya. From the west and east it appears a broad dome...trachybasalt and phonolite. Just to the south of the Kenya border, the lowest lavas rest upon basement quartzite |
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| Sillimanite as an Index of Metamorphic Grade in the Kenya Basement System 1 By L. D . SANDERS (PLATES I AND...in these circumstances its distribution in the Kenya Basement System is reviewed and the field relationships...and faserkiesel migmatites occurring in central Kenya are described. It is concluded that sillimanite...high-grade metamorphic conditions prevalent in Kenya during Basement System times were accompanied by...the Commissioner of Mines and Geology, Nairobi, Kenya. The Status of Sillimanite 145 however, caused |
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| ................. II. Physical Geography of Mount Kenya ..................... III. Petrography ........Stratigraphy of ]l~ount Kenya ........................ V. The Geological History of Mount Kenya .................. VI. Kenya and Kilima Njaro .................................... VII. Summary of Conclusions .........211 216 210 218 220 221 L INTRODUCTION. MOU~T KENYA, the greatest mountain in British East Africa, wa~...of Kitui. No suggestion as to the structure of Kenya was made until 1883, when Joseph Thomson, after |
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| NATURAL RESOURCES AND ENVIRONMENT Held at Nairobi, Kenya March 21 to April 3, 1974 / -<.... U.S. Geological...WITH THE / V. 5. Geological Survey GOVERNMENT OF KENYA OPEN FILE REPORT Thie report b preliminary and...natural resources and environment, held at Nairobi, Kenya, March 21 - April 3, 1974 s. Performing Org ani...resources and the environment held in ~airobi, Kenya, March 21 April 3, 1 974, attended by participants...and Document Analysis. 17o. Descriptors Training: Kenya, Ethiopia, Tanzania, Zanzibar, Malagasy, Nigeria |
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| ranging from the forested northern slopes of Mount Kenya, over 3300 m above sea level, northwards through...21 21 FIGURES 1 Generalised geological map of Kenya showing location of Samburu-Marsabit project area...exploration in the central part of the Phase One area. Kenya Geological Survey maps, on the scale of 1: 125 000...Falls- Lake Hannington area. Further north the Kenya Rift Valley Project of the East African Geological...Department, Machakos Road, PO Box 30009, Nairobi, Kenya. 18 SUDAN 36 ° 38 ° ETHIOPIA 40 ° . �---�- |
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| 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...feldspar versus silica, for analysed lavas from Kenya and Tanganyika, are used to illustrate the trends...nephelinitic lavas and carbonatite complexes in Kenya is discussed and the possibility mooted that the... INTRODUCTION THE Tertiary to Recent lavas of Kenya are a typical continental sodic alkaline suite, |
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| thence, skirting the northern flanks of Mt. Kenya, to Meru and Archer's Post on the northern Uaso Nyiro...southwards merges into the northern slopes of Mt. Kenya. The lower plain is broken to the north and west...of Somalis and rarely crossed by a European. From Meru northwards, through the centre of the Northern Frontier...flows, extending from the northern flank of Mt . . Kenya�form characteristic scenery. These flows are not...paJ:t of the Protectorate. The serTated mass of Kenya, so different from the almost perfect cone of the |
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| time into account with a comparison between Mount Kenya (tropical Afroalpine), the Dry Valleys of the...Gorges-age belt of moraine on the east flank of Mount Kenya (Mahaney 1990), were shown to have weathered...nearly 50/50 proportions (Mahaney 2015b). The Mount Kenya example also highlights a lithic mix of syenite...recovered from existing A1B horizons in paleosols on Mount Kenya and elsewhere may produce minimum coating thicknesses...coatings on grains from buried paleosols on Mount Kenya (pre-Olduvai) are likely locked into post-Pliocene-Pleistocene |
 | | Book |
| noted gemologist and geologist, Dr. Peter Keller. Kenya and Tanzania are revealed in their full mineralogical...of the 'Irelawney Collection of the Los Angeles County Museum of Natural History. ♦ Figures vii Foreword...Tanzania 32 Sapphire from Kenya 42 Ruby from Mangari, Tsavo West National Park, Kenya 44 Chapter 4. Emerald...Red Dravite Tourmaline from the Narok District, Kenya 99 Uvite-Dravite Chrome Tourmaline 99 Chapter 8...Appendix B. East African Gemstones in the Los Angeles County Museum of Natmal History Collections 138 Appendix |
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| No. 90 REPUBLIC OF KENYA MINISTRY OF NATURAL RESOURCES Geological Surrey of Kenya GEOLOGY OF THE AMBOSELI...of about 730 square miles situated in southern Kenya at the foot of Mt. Kilimanjaro. It is enclosed by...longitudes 37°00' and 37°30'E, latitude 2°30*S and the Kenya-Tanzania border. Hills in the north preserve relics...this report, the Amboseli area is defined as the Kenya part of the south-western quarter of Degree sheet...37°00' and 37°30'E, the parallel 2°30'S and the Kenya-Tanzania boundary. The area includes a large portion |
 | | Book (edition) |
| Commission for Africa. Formerly Government Demographer, Kenya. 41 6 PHYSICAL FEATURES by L. BERRY, b.sc., m...Formerly Chief Geologist, Geological Survey of Kenya. 67 8 SOILS 95 by R. M. SCOTT, b.sc. Commonwealth...Ministry of Agriculture, Kenya. 153 14 AGRICULTURE AND LAND TENURE IN KENYA by J. W. MAINA, M.sc., m...Director of Agriculture, Uganda. 199 17 FORESTRY IN KENYA by E. J. HONORIS, b.a. Formerly Chief Conservator...amphibolites and schists. 2a The summit of Mt. Kenya, composed of nepheline syenite and phonolite. 2b |
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| 12 – 9 Ma) is poorly represented in the Southern Kenya Rift, though magmatic activity is recorded in the...– 4 Ma) is particularly well-represented in the Kenya Rift. Large-scale magmatic events include: commencement...Divergence (NTD) and Mt. Kenya, Rungwe Volcanic Province, and the Southern Kenya Rift. The Stratoid Phase...magmatic events at ca. 3 to 2.5 Ma within the Southern Kenya Rift and NTD. This phase manifests as basalts and...that flood the newly formed graben in the Southern Kenya Rift. This phase also correlates with the main phase |
 | | Book (edition) |
| Commission for Africa. Formerly Government Demographer, Kenya. 6 PHYSICAL FEATURES by L. BERRY, B.SC., M.SC...Agriculture, Kenya. 14 AGRICULTURE by J. MAINA AND LAND WANJIGI, TENURE IN KENYA M.aA., M.SC...Director of Agriculture, Uganda. 199 17 FORESTRY IN KENYA by E. J. HONORE, B.a. 209 Formerly Chief Conservator...amphibolites and schists. 2a The summit of Mt. Kenya, composed of nepheline syenite and phonolite. 2b...the Mt. Kenya I.G.Y. expedition, on the Lewis Glacier. 3a Kilimanjaro. 3b Kasigau, near Voi, Kenya. An erosion |
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| close resemblance to the " Kapitian phonolites " of Kenya Colony, which Professor J. W. Gregory 2 regards...of iron oxides may represent altered amphibole. Biotite, probably secondary, occurs as minute flakes here...from the specimens collected by J. W. Gregory in Kenya Colony in 1892-3. These rocks, together with some...[N 416,417]. Rather similar rocks, phonolites (Kenya type), but richer in nepheline, were recorded in...they probably come very near to Prior's phonolite (Kenya type) .2 N 720, a flow-banded lava, is only a devitrified |
