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pro vyhledávání: '"Wolela, Ahmed"'
Autor:
Wolela Ahmed
Publikováno v:
Bulletin of the Chemical Society of Ethiopia, Vol 22, Iss 1, Pp 67-84 (2008)
Inter-Trappean coal and oil shale-bearing sediments are widely distributed in the Delbi-Moye, Lalo-Sapo, Yayu, Sola, Chida, Chilga, Mush Valley, Wuchale and Nejo Basins. Coal and oil shale-bearing sediments were deposited in fluvio-lacustrine and pal
Externí odkaz:
https://doaj.org/article/3c6467a69aaa4d3b8f94412a0d2c441d
Autor:
Wolela Ahmed
Publikováno v:
Bulletin of the Chemical Society of Ethiopia, Vol 22, Iss 1, Pp 41-65 (2008)
Adigrat sandstone formation in the Blue Nile Basin is dominated by quartz arenite and subarkosicarenite, and cemented by carbonate, clay minerals and quartz overgrowths. Clay minerals in the Adigratsandstone formation are dominated by kaolinite, illi
Externí odkaz:
https://doaj.org/article/a832af38ab8545da942b320da9d8f86e
Autor:
Wolela Ahmed
Publikováno v:
Bulletin of the Chemical Society of Ethiopia, Vol 21, Iss 1, Pp 39-61 (2007)
The East Berlin formation consists mainly of alternating sequences of fluviatile, lacustrine and playa sediments. Diagenetic sequences reconstruction revealed the same range of authigenic minerals in the studied sandstones and the interbedded fine-gr
Externí odkaz:
https://doaj.org/article/9db0ffb885874d978c25d0cb1dc25465
Autor:
Wolela Ahmed
Publikováno v:
Bulletin of the Chemical Society of Ethiopia, Vol 16, Iss 1, Pp 9-35 (2002)
Beds of siltstone, mudstone and shale are interbedded in the Permo-Triassic sandstones of the Ulster Basin, UK, at different stratigraphic levels. The paragenetic sequences of authigenic minerals both in the sandy and fine-grained sediments (mudstone
Externí odkaz:
https://doaj.org/article/45d1420beef94696a14d1c345643e623
Autor:
Wolela Ahmed
Publikováno v:
Bulletin of the Chemical Society of Ethiopia, Vol 16, Iss 1, Pp 37-52 (2002)
Volcanic intrusions and hydrothermal activity have modified the diagenetic minerals. In the Ulster Basin, UK, most of the authigenic mineralization in the Permo-Triassic sandstones pre-dated tertiary volcanic intrusions. The hydrothermal fluids and h
Externí odkaz:
https://doaj.org/article/21bcdd3ddfec49ba9a0c2817aa475233
Publikováno v:
Bulletin of the Chemical Society of Ethiopia, Vol 6, Iss 2, Pp 59-73 (1992)
BuII. Chem. Soc. Ethiop. 1992, 6(2) 59-73.
Externí odkaz:
https://doaj.org/article/ee09067bf7724ccfa217fe62606a0e5e
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