 | | Journal (article/letter/editorial) | | COMPOSITION OF ANORTHOCLASE AND NEPHELINE IN MOUNT KENYA PHONOLITE AND KILIMANJARO TRACHYTE, AND CRYSTAL–GLASS...for anorthoclase and glass in phonolite from Mount Kenya and trachyte from the Kibo cone of Kilimanjaro...Kilimanjaro, and for nepheline in the Mount Kenya specimen. With the exception of Ba and Sr in anorthoclase, Eu...from Pantelleria and the western U.S.A. In the Mount Kenya phonolite, nepheline concentrates Li, Be, Mg...nepheline, glass, trace-element partitioning, Mount Kenya, Kilimanjaro, East Africa. Sommaire Nous présentons |  | | Journal (article/letter/editorial) | | The Mineralogy and Petrology of Mount Suswa, Kenya by W. P. NASH, I. S. E. CARMICHAEL, and R. W. JOHNSON...sodalitebearing, undersaturated lavas from Mount Suswa in Kenya; it is a complement to a second publication...thesis to the University of London (Johnson, 1966). Mount Suswa is a Quaternary, central-type volcano situated...situated on the floor of the Rift Valley of Kenya (Fig. la) and is composed predominantly of trachytic and...flows which, in the arid climate of this part of Kenya, are fresh and ideal for chemical study. Specimens |  | | Journal (article/letter/editorial) | | phonolites and trachytes from the summit region of Mt. Kenya R.C. Price 1, R.W. Johnson 2, C.M. Gray 1, and F...summit region of the Plio-Pleistocene volcano, Mr. Kenya. Most of the samples are moderately or strongly...suite of samples from the summit region of Mt. Kenya. The suite covers a range of phonolitic and trachytic...alkalic compositions. Geological setting. Mr. Kenya, which reaches a summit of 5,200 m is a central...some to be Offprint requests to: R.C. Price oUT KENYA XO5% ,'~)Ab erdare Range I ~)1 Esakut & OI Esayeti |  | | Journal (article/letter/editorial) | | nomenclature for the sapphirine group (formerly aenigmatite group) makes extensive use of precedent, but...two largest M sites, namely, sapphirine (Mg), aenigmatite (Na), and rhönite (Ca). Classification at the...which the dominant cation is most often Ti (aenigmatite, rhönite, makarochkinite), Fe3+ (wilkinsonite...not recommended. K EY WORDS : nomenclature, aenigmatite, sapphirine, surinamite, chain silicates. Statement...meteorite. We have chosen sapphirine rather than aenigmatite to name the supergroup and larger group therein |  | | 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 |  | | Report (issue) | | 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 |  | | Report (volume) | | 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...on the peralkaline silicic central volcanoes of Kenya and also favours an origin by crystal fractionation |  | | Book | | carbonatitic-alkaline province outcropping on the Kenya-Uganda border which have recently received significant...Ring-Complexes ........................ . . .. 4.1 Mount Bana ..................................... 4.2 Nda......... 5.5 Mount Etinde ................. . . . . . . . . . . . . . . . . . .. 5.6 Mount Cameroon .....domain characterized East Africa from Madagascar and Kenya-Ethiopia to northeastern Sudan. It represents the...Popoff 1988a). Like the Atlantic Benue trough, the Kenya-Sudan Mesozoic trends could correspond to a failed |  | | Book | | accessory constituents such as astrophyllite and aenigmatite not found in the other granitic rocks. Textures...at the eastern edge of the figure, accessory aenigmatite surrounded by aegirine; X 24. Peralkaline granites...irregular prisms and large anhedra. Aegirine and aenigmatite are present among the accessory constituents...primary muscovite. Peralkaline rhyolites have aenigmatite as their most constant ferro¬ magnesian phenocryst...more prominent in the groundmass and include aenigmatite, aegirine, arfvedsonite and riebeckite. Accessory |  | | Report (issue) | | A354V65 2011 551.21096—dc22 2011006982 Cover: (Top) Mount Meru (4566 m high), Tanzania, from the western side...upper-mantle low-velocity anomaly beneath Ethiopia, Kenya, and Tanzania: Constraints on the origin of the...Resources for Development, P.O. Box 632, 00618 Nairobi, Kenya ABSTRACT Assessments of the extension directions...upper-mantle low-velocity anomaly beneath Ethiopia, Kenya, and Tanzania: Constraints on the origin of the...to broadband seismic data recorded in Tanzania, Kenya, and Ethiopia. (1) Joint inversions of receiver |  | | Book (edition) | | field work on the Iron Hill complex of Gunnison County, Colorado, in 1912-1913. Although his final results...1955), L. J. Fick and C. van der Heyde (1959). Kenya: B. H. Baker (1953), G. L. Coetzee and C...Tanganyika. b. In generally unaltered rocks: Ravalli County, Montana, and Verity, British Columbia. Similar...iron, fixed in sodic pyroxenes, amphiboles, or aenigmatite, not as oxide species. 1 na, k, al = relative...significant elements. Aegirine, Na amphibole and/or aenigmatite Biotite, diopside, augite, Main foids: Nepheline |  | | Book | | kaersutite kataphorite arfedsonite riebeckite aenigmatite (syn. cossyrite) cummingtonite Composition 3...greatly. The large well-documented Osceola mudflow at Mount Rainier (Crandell and Mullineaux, 1967) travelled...Vesuvius after the eruption of A . D . 79, and that of Mount St. Helens after the eruption of 1980. Catastrophic...Crater Lake, Oregon, on the site of the ancestral Mount Mazama is a familiar example. Caldera formation...during the century or so of European observation. Mount Rainier in the state of Washington, one of the High |  | | Book (edition) | | end-members of yet another variable series, and aenigmatite, formerly termed cossyrite, and the only Triclinic...arfvedsonite in the groundmass. Finally we note aenigmatite, probably the most distinctive of the brown amphiboles;...very abundant aenigmatite. Some varieties of peralkaline syenites also contain aenigmatite, associated...:Fe203 is the reverse of that of kaersutite. Aenigmatite demands for its formation high Ti02, high Na20...vary as much as do the different species: only aenigmatite appears to be reasonably constant in this respect | | | Book (edition) | | end-members of yet another variable series, and aenigmatite, formerly termed cossyrite, and the only Triclinic...arfvedsonite in the groundmass. Finally we note aenigmatite, probably the most distinctive of the brown amp...very abundant aenigmatite. Some varieties of peralkaline syenites also contain aenigmatite, associated...Fe2 O3 is the reverse of that of kaersutite. Aenigmatite demands for its formation high Ti0 2, high Na...vary as much as do the different species: only aenigmatite appears to be reasonably constant in this respect |  | | Book | | northern portion in northern Tanzania, western Kenya, and eastern Uganda where the Nyanzian System, composed...through Rhodesia, Mozambique, Malawi, Tanzania and Kenya, and is characterised by ages of 400-700 m.y. (Cahen...rejuvenated antique sequences: the Nyanzian of Kenya (Sanders, 1965); the Bulawayan of Rhodesia (Johnson...and the Mozambique Belt in western Kenya. Bull. geol. Surv. Kenya, 7. ScureIner, G. D. L., and VAN NIgkERK...North-east Uganda; 8, West Suk, Kenya; 9, Baragoi, Kenya; 10, Machakos, Kenya; 11, Uluguru Mountains, Tanzania; |  | | Book (edition) | | The largest groups of new terms have been U.S. county names; rock-formation names (mostly North American);...Thesaurus. These include local geographic terms, U.S. county names, rock-formation names, and fossil names....term must be a name unique to one area. Lincoln County is not assigned coordinates in the Thesaurus, because...North America from the broader terms of Hanover County. There is no reciprocal entry for each broader...counties of the United States; e.g., Chautauqua County may have a broader term Kansas or New York. BX |  | | Book | | albite. (Turner, 1896, p.728; Meadow Valley, Plumas County, 51 California, USA; Tröger 169; Johannsen v.3...although it does describe the type rock; Amherst County, Virginia, USA; Tröger 294; Tomkeieff p.22) AMIATITE...fayalite (3.6%) and accessory magnetite, apatite, aenigmatite, hastingsite and cancrinite. (Andrade, 1954;...amphiboles and containing sodic pyroxene and aenigmatite. (Osann, 1896, p.402; Apache (now Davis) Mts...(Adams & Barlow, 1908, p.67; Dungannon, Renfrew County, Ontario, Canada; Tröger 550; Johannsen v.4, p |  | | Book (edition) | | the total of 4,284 new Terms were United States county and city Terms. Counties and Cities in the United...States Earlier editions had Terms such as Washington County and Portland for counties and cities of the United...for example: Washington County Arkansas and Portland Maine. Each new county Term can now autopost its...to counties was a major task. The scope of U.S. county and city Terms can now be clear even when they...For example, whenever an in¬ dexer uses Atchison County Kansas the Terms Kan¬ sas, Midwest, and United |  | | Report (issue) | | outside bodies but including two overseas visits, to Kenya and Bolivia to conduct assess ments, and the testing...tial assi gnments in Bolivia, Botswana, Colombia, Kenya, Indonesia, Malawi, Peru, Solomon Islands, Sri Lanka... Ecuador, E gypt , Gibraltar, Honduras, India, Kenya, Malaysia, Malawi, Pakistan , Philippines, Solomon...Hydrogeology Unit, Geophysics and Hydrogeology Division . Kenya The Samburu - Marsabit Geological Mapping and Mineral...Rift Valley to the west, and the massifs of Mount Kenya and the Nyambeni Range to the south: rock types |  | | Book (volume) | | 1908, 207. Also in U.S.G.S., P.P. 99, 351. Park county, Montana. Jour. Geol., 74 A DESCRIPTIVE PETROGRAPHY...norites example .31. It from EHzabethtown, Essex County, in Osann's classification, gives the values ... A peralkaline group, characterized lyte, aenigmatite, etc., by soda-p5a'oxenes and by the virtual...Miller: Geology of the North Creek quadrangle, Warren county, New York. Bull. N.Y. State Museum, No. 170, 1914...relation of the titaniferous magnetite ores of ton county, Ontario, to the associated scapolitic gahhros |  | | Book (volume) | | the seat of a bishop; and chief town of the ami (county) of its name, on the south bank of the Limf jord...AALESUND, a seaport of Norway, in Romsdal ami (county), 145 m. N. by E. from Bergen. Pop. (1900) 11,672...(Mellingen, Muri, Villmergen, and Bremgarten), with the county of Baden, were ruled as " subject lands" by all...largest town in the kingdom, and capital of the ami (county) of Aarhus. Pop. (1901) 51,814. The district is...sent by Yahweh (Jehovah) to meet Moses at the " mount of God (Horeb, Ex. iv.27), he plays only a secondary |
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