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The Suq al Jum'ah Palaeowadi, an Example of a Plio-Quaternary Palaeo-valley from the Jabal Nafusah, Northwest Libya

Published online by Cambridge University Press:  03 March 2015

S. M. Ghellali  and
J. M. Anketell
S. M. Ghellali
Affiliation:
Faculty of Earth Science, Al Fateh University, Tripoli, S.P.L.A.J.
J. M. Anketell
Affiliation:
Department of Geology, Manchester University
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Abstract

Study of borehole data in the foothill region of the Jabal Nafusah shows that the Suq al Jum'ah palaeowadi, which cuts the jabal east of Gharyan, comprised a major drainage channel which extended in the subsurface far out from the jabal into the southern part of the Jifarah Plain. The channel is filled with sands and gravels. Basalt lava flows, channelled along the valley in outcrop for 36 km, extend for a further 48 km in the subsurface. The palaeowadi was possibly initiated in the Pliocene and appears to have been completely filled and abandoned by the end of the Pleistocene. During Holocene rejuvenation of the drainage system, the Wadi al Majanin developed as the major wadi in the region. It did not, however, excavate the palaeowadi but instead followed a different but roughly parallel northward trend.

Type
Articles
Information
Libyan Studies , Volume 22 , 1991 , pp. 1 - 6
Copyright
Copyright © Society for Libyan Studies 1991

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References

Anketell, J. M. and Ghellali, S. M. 1988. Stratigraphy of the Qasr Al Haj Formation, Tripolitani S.P.L.A.J. Libyan Studies 19:123–32.CrossRefGoogle Scholar
Anketell, J. M. and Ghellali, S. M. 1991a. In the press. Quaternary sediments of the Jifarah Plain — stratigraphy and sedimentary history. Third Symposium of the Geology of Libya. Tripoli 1987.Google Scholar
Anketell, J. M. and Ghellali, S. M. 1991b. In the press. A palaeographic map of the pre-Tertiary surface in the region of the Jifarah Plain and its implication to the structural history of northern Libya. Third Symposium of the Geology of Libya. Tripoli1987.Google Scholar
El Hinnawy, M. and Cheshitev, G. 1975. Geological Map of Libya. Tarabulus (NI33-13). Explanatory Booklet, Industrial Research Centre S.P.L.A.J.Google Scholar
GEFLI (1974). Bir At Tarfass Project, Southern Azizia; Choice of Options. 2, Water resources – Detailed Study. Unpublished Rep., Agric. Dev. Council, Tripoli.Google Scholar
GEFLI (1976). Survey for Agricultural Development; Wadi Hira, Wadi Abu Shaybah and Gharyan Project. 1–3, Water Resources, Section 4: Hydrogeology. Unpublished Rep., Agric. Dev. Council, Tripoli.Google Scholar
Ghellali, S. M. 1977. On the Geology of the eastern Gefara Plain, North West Libya. Ph.D. Thesis. Univ. Manchester, England.Google Scholar
Vail, P. R., Mitchum, R. M., Todd, R. G., Widmier, J. M., Thompson, S., Sangree, J. B., Bubb, J. N. and Hatledid, W. G. 1977. Seismic Stratigraphy and Global Changes in Sea Level. In: Seismic Stratigraphy-applications to Hydrocarbon Exploration, (ed. Payton, C. E..) Amer. Assoc. Petrol. Geol. Mem. 26: 49–212.Google Scholar
Vail, P. R. and Mitchum, R. M. 1978. Global cycles of relative changes in sea level from seismic stratigraphy. Am. Assoc. Petr. Geol. Mem. 29:469–472.Google Scholar
Wiman, S. K. 1980. Stratigraphic and Micropalaeontologic Expression of the Mediterranean Late Miocene (Messinian) Regression and Early Pliocene (Zanclean) Transgression in Northeastern Tunisia. In: The Geology of Libya Vol. III. ed. Salem, S. M. and Busrewil, M. T..Google Scholar