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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...permission of the Commissioner of Mines, Nairobi, Kenya. 68 W. Pulfrey— The frame of the intrusions—Basement |
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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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| 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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| 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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| 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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| 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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| March 17, 2015 Palaeolimnology of Lake Bogoria (Kenya) during the 4500 BP high lacustrine phase A. Vincens...SUMMARY: Lake Bogoria (altitude 990 m) lies within the Kenya Rift Valley (0°15'N, 36°10'E). A high lake stage...half-graben at the foot of the eastern flank of the Kenya Rift Valley, just N of the equator (0°15'N, 36°10'E)...i.e. higher than the isotopic composition of a calcite deposited in equilibrium with atmospheric CO2 at...March 17, 2015 Palaeolimnology of Lake Bogoria (Kenya) 325 M A J I MOTO i 1100 '!i:iiii:!;:i:iiii:ii~ii |
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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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| 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 |
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| Cl measured in 122 boulders from moraines on Mount Kenya and Kilimanjaro. The oldest deposits sampled...in calendar years, cal. kyr or cal. yr). On Mount Kenya, the oldest moraines give ages of 355^420 kyr...on either mountain. The Liki II moraines on Mt. Kenya and moraines of the Fourth Glaciation on Kilimanjaro...readvances that occurred during the late glacial. On Mt. Kenya, these deposits date to 14.6 þ 1.2 kyr (Liki IIA)...and timing of climate change in the tropics. On Mount * Corresponding author. Tel.: +1-520-621-4072; |
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| 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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| in Commonwealth Countries United Kingdom Ghana Kenya Malawi Rhodesia Sierra Leone Tanzania Uganda Zambia...nepheline-bearing rocks in parts of Uganda and Kenya page 62 Figure 6 Nepheline-syenite occurrences...are crucial as transportation costs can quickly mount up to a prohibitive level. Although some dark-coloured...attacks only the feldspathoids and any trace of calcite present. The surface is then coated with silver...replacement by cancrinite, nepheline may be replaced by calcite or 8 NEPHELINE-SYENITE AND PHONOLITE altered |
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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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| 273 BAKER, B. H. Outline of the petroIogy of the Kenya rift alkaline province 293 MACDONALD,R. Quaternary...peralkaline silicic rocks and caldera volcanoes of Kenya 313 WOOLLEY, A. R. & JONES, G. C. The petrochemistry...on the peralkaline silicic central volcanoes of Kenya and also favours an origin by crystal fractionation...pyroclastic deposits around central volcanoes in Kenya often show striking variations in the abundance...evolves at low pressure towards the more common calcite carbonatite (s6vite) by loss of alkalis to the |
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| the microscope to occur as discrete grains of calcite, is derived from the Chalk. Small calcareous rootlet...for the formation of loesslike material on Mt. Kenya (Zeuner, 1949). V. THE ORIENTATION OF THE PEBBLES...Ray Society, London. • 1949. Frost soils on Mount Kenya. Soil Science, i, 20. DEPARTMENT OF GEOLOGY, |
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| either be camouflaged in early species (Ba in calcite) or be represented by their own minerals (late...the nepheline rocks are often also very rich in calcite, which in many varieties of these rocks forms graphic...silicates. Other evidence also proves that the calcite and the limestone have really formed part of a...field work on the Iron Hill complex of Gunnison County, Colorado, in 1912-1913. Although his final results...there, concluding from the textural relations of calcite to silicate species in thin section “that the carbonates |
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| will influence the replacement of its shell as calcite or aragonite—in other words, their distribution...lie before Mount Kenya, on the west coast of the Hed Sea also, and more to the north on Mount Lebanon and |
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| 59 GOVERNMENT OF- KENYA MINISTRY OF NATURAL RESOURCES GEOLOGICAL SURYEY OF KENYA OF THE NORTH--MA€HÄKOS-l4EIIKA•...an area of about 1,200 square miles of central Kenya in the Central and Southern Provinces, about thirty...report covers the quarter degree sheet 52 N.W. (Kenya) (Directorate of Overseas Surveys sheet No. 149)...extent and lies partly in the Southern Province of Kenya, administered from Machakos, and partly in the Central...height from 4,000 feet to 7,000 feet. Throughout Kenya erosion bevels have been recorded on the Basement |
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| (except in bearing leucite) with the kenyites of Mount Kenya,1 and belong to the family of trachy-dolerites...pseudobrookite, analcite, and other zeolites, calcite, and Iryalite occur. According as nepheline or |
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| emplacement of the phonolitic Yatta lava flow, Kenya 285 vi CONTENTS MAHANEY, W. C., BARENDREGT...Neogene volcanics and interbedded palaeosols near Mount Kenya 301 CAPITANIO, F. A., FACCENNA, C., FUNICIELLO...characteristics of a 350 km long middle Miocene lava in Kenya to determine a minimum slope required for its outflow...determine a minimum elevation of the source region in Kenya in middle Miocene times of 1400 m. Mahaney et al...2 Ma palaeosols preserved between lavas near Mt Kenya. They use these palaeosols to infer the continental |
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| Conca and Astor (1987) Granite Alaska, USA calcite Yoshikawa et al. (2006) Gypsum Spain lichen...oxide, calcite, quartz McBride and Picard (2004) Sandstone Nevada, USA kaolinite, calcite Conca...Weathering rinds: archives of paleoenvironments on Mount Kenya, East Africa. Journal of Geology 120: 591-602...Okura Y, Autier V, Ishimaru S (2006) Secondary calcite crystallization and oxidation processes of granite |
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| f Cretaceous. 3. Conducia and Monapo Beds. 2. Mount Meza Beds. 1. Fern,5() Velloso Beds. Pre-Cambrian...fel- Mount Meza and spathic,with calcareous the adjoining bands. district, i Monapo Beds. " Mount Meza...were collected by Mr. Reid during a journey to Mount Meza. In the case of three of his specimens, the...containing rusty amygdales partly occupied by calcite. Both in the composition of the amygdale minerals...is the p h o n o l i t e , and it also contains calcite as the chief occupant of the vesicles. At the top |
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| continents. Field work was conducted in Chad, Ethiopia, Kenya, Malawi, Nigeria, Sudan, Tanzania and Uganda. However...Baker, B.FL Tectonics and volcanism of the southern Kenya Rift Valley and its influence on rift sedimentation...structures, salic volcanism and sedimentation in the Kenya Rift from the equator northwards to Lake Turkana...landtorm evolution in a rift valley basin, northern Kenya. Frostick, L.E. & Reid, I. Evolution and sedimentary...ephemeral rivers in the Turkana basin, northern Kenya. Cohen, A.S., Ferguson, D.S., Gram, P.M., Hubler |
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| Report No. 45 COLONY AND PROTECTORATE OF KENYA MINISTRY OF COMMERCE Ä N D INDUSTRY GEOLOGICAL SURVEY...of South Nyanza, in the south-western corner of Kenya. It is a most important area as in its northern...1,400 square miles of South Nyanza, in western Kenya, on the shore of Lake Victoria! The land area is...part of the south-west quarter of Degree Sheet 41 (Kenya), corresponding with the Directorate of Colonial...dissected volcano, of even larger areal extent than Mount Elgon. The slopes are steep, traversed by numerous |
