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Turbidity events observed in situ along the Congo submarine channel ArchiMer
Vangriesheim, Annick; Khripounoff, Alexis; Crassous, Philippe.
As part of the multidisciplinary programme BIOZAIRE devoted to studying deep-sea benthic ecosystems in the Gulf of Guinea, particulate input and its relationship with near-bottom hydrodynamics were monitored using long-term moorings from 2000 to early 2005. Particular attention was given to material input through the Congo (ex-Zaïre) submarine channel that extends 760 km from the Congo River mouth to the abyssal plain (>5100 m) near 6°S. Due to its direct connection to the Congo River, the Congo canyon and channel system are characterised by particularly active recent sediment transport. During this first in situ long-term monitoring along the channel, an energetic turbidity event was observed in January 2004 at three locations along the channel from...
Tipo: Text Palavras-chave: Suspended sediment transport; Turbidity current; Deep current; Congo canyon; Zaïre; Gulf of Guinea.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-6738.pdf
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Notes on Micractaeon, a monotypic genus of African land snails (Gastropoda Pulmonata: Ferussaciidae?) Naturalis
Bruggen, A.C. van; Winter, A.J. de.
Micractaeon kakamegaensis Verdcourt, 1993 (type loc. Kenya, Kakamega Forest), is a synonym of Pseudopeas koptawelilense Germain, 1934 (type loc. Kenya, Mt. Elgon); the proper name is therefore Micractaeon koptawelilensis (Germain, 1934). New anatomical data are supplied, more or less confirming classification in the family Ferussaciidae. The shell is subject to some considerable variation in size, shape and sculpture. The species appears to be widely distributed in various types of forest in tropical Africa (Ghana, Cameroon, eastern and south-eastern Zaïre, Kenya, Malawi, and eastern Zambia); hypsometrical distribution is generally from c. 950 m to c. 2300 m, although in Ghana it has been collected at altitudes of between < 250 and c. 700 m.
Tipo: Article / Letter to the editor Palavras-chave: Gastropoda; Pulmonata; Ferussaciidae; Micractaeon; Africa; Ghana; Cameroon; Zaïre; Kenya; Zambia; Mala?i; Taxonomy; Distribution; 42.73.
Ano: 1995 URL: http://www.repository.naturalis.nl/record/319133
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