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http://hdl.handle.net/1834/818
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| Title: | Preliminary investigation on the Pleistocene/Holocene Sea-Level Changes along the Coastline of Tanzania, with reference to Unguja and Pemba Islands |
| Authors: | Nyandwi, N.
Muzuka, A.N.N.
Shaghude, Y.W. |
| ASFA Terms: | Geology
Pleistocene
Holocene |
| Issue Date: | 2003 |
| Abstract: | Along the coast of Tanzania, coral reefs, marine terraces and beach ridges are among the
most important geomorphological features indicative of the Pleistocene/Holocene sea
level changes. Three major terrace units can easily be identified on the mainland coast,
namely, Mtoni (youngest), Tanga and Sakura (oldest). Three terrace units have also been
identified on the Islands of Unguja and Pemba. On the basis of the difference in the
terrace elevations between the two terrace systems it is postulated that the marine terraces
on the islands probably represent minor fluctuations of sea level, rather than major phases
of sea level fluctuation. A sand beach on the seaward side and several sand ridges on the
landward side represent the Recent phase. The oldest Palaeoshoreline is approximately 5
m above the present sea level, and extends landward to more than 1 km. Specific
localities around the two islands where Pleistocene/Holocene sea level changes has been
preserved in the form of marine terraces and/or beach ridges include Chwaka, Uroa,
Jambiani, Paje and Nungwi (Unguja island) and Vumawimbi and Kiuyu (Pemba island). |
| URI: | http://hdl.handle.net/1834/818 |
| Appears in Collections: | Miscellaneous
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