 | | Book | | .......................................... 203 Guyana .................................................croperthitic orth oclase, lesser andesine, aegirine-augite, a rfvedsonitic amphi bole, biotite and m...feldspar. perth i te, nepheline, aegiri ne/aeg i rine-augite, bluish amp h i bole, b ioti te, sodali te, which...ultramafic, the rock consi s ting of 40% olivine, 25% Ti-augite, together with very minor antiperth i te, interÂ...consisting of about 35% antiperthite, 25-30% Ti-augite rimmed by green sodic pyroxene and blue sodic amphibole |  | | Report (volume) | | Formation, Canaima National Park in the Gran Sabana region of Estado Bolfvar, Venezuela. View is southsoutheast...Northeastern South America including Venezuela, Guyana, Suriname, and Northern Brazil.............. 1...America and includes parts of Venezuela, Colombia, Guyana, Brazil, Suriname, and French Guiana. The Guapore...Proterozoic craton in South America. It underlies most of Guyana, Suriname, and French Guiana, as well as parts...constitutes the southern margin of the vast plains region referred to as Los Llanos; the Gran Sabana makes |  | | Report (Issue volume) | | additional light on the occurrence of diamonds in this region. Gold, native copper, chalcopyrite, molybdenite...'Gaylussite-bearing clays from the Lake Amboseli region of Kenya' ; November, 1 965. No. 2 1 3 : 'Samples...rougl1 tracks and wadi beds. The economy of the region was originally based upon pearling, fishing, goat...Geology The first clear outline of the geology of the region as a whole was given by Lees ( 1 928) ; detailed...Trucial States. For the purpose of this account the region may be divided into three parts : ,. PLA fE |
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