 | | Book | | Democratic Republic of the Congo Ethiopia Guinea Libya Malagasy Republic Mali Republic Morocco iti Contents...identify. In addition to marginal replacement by cancrinite, nepheline may be replaced by calcite or 8...nosean and haiiyne are typically found in lavas. Cancrinite crystallises in the hexagonal system and has...with carbonate, chlorine and sulphate radicals. Cancrinite occurs in coarse-grained rocks where it may be...locality in which the nepheline has been replaced by cancrinite and white mica, while malignite carries around |  | | Book | | chronology: Nubia (650 Ma), Iforas (560- 540 Ma), Uweinat (490), AIr (490-400 Ma), BaIche-Mangbai (425-384...(Cret.-Mioc.), Los (96 Ma), Red Sea Hills (90 Ma), Uweinat (60 Ma), Cameroon Line (60- 30 Ma and 30 Ma-Present)...isotropic mineral (? sodalite, hauyne, nosean, cubic cancrinite) which also occurs as microphenocrysts and as...Nepheline and leucite are the most common, but cancrinite and accessory sodalite can also be present. Complementing...if' Cope Verde Ahaggar ()-o ~ Tibesti cY Jebel Mora Tristan do Cunha Fig. 4. Africa-hot spot |  | | Report (issue) | | and South Midlands District. . . . . . . . East Anglia and South-East England District . . . . . South-Western...South-Western District . . . . . . . . . . . . Southern Wales and Welsh Marches District . . . . . London Drawing...and Wales North-Eastern District . . . . . . . . . . . . }Jorth Wales District . . . . . . . . . . . ... North-Western District . . . . . . . . . . . . Yorkshire and East Midlands District . . . . . . . Leeds...Highlands and Islands District . . . . . . . • • • }J orth Lovvlands District . . . . . . . . . • • • |
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