Number One Reef: An overstepped segmented lagoon complex on the KwaZulu-Natal continental shelf
South African Journal of Science
| Field | Value | |
| Title | Number One Reef: An overstepped segmented lagoon complex on the KwaZulu-Natal continental shelf | |
| Creator | Green, Andrew Leuci, Rio Thackeray, Zane Vella, Godfrey | |
| Description | This study of the bathymetry of the mid-shelf of the Durban Bight, KwaZulu-Natal revealed a series of previously undocumented seafloor features. These features were mapped using a high-resolution multibeam bathymetric echosounder and a detailed map of the seafloor topography was produced. We recognised several features that closely resemble features of contemporary segmented lagoon and lake systems: semicircular seafloor depressions, arcuate ridges, cuspate spits and prograding submerged barriers. Based on the striking similarity in morphology to Kosi Bay – a segmented lagoon system from the sandy northern KwaZulu-Natal coastal plain – a similar evolutionary model is proposed. This model is of an incised valley formed following a sea level lowering to the Last Glacial Maximum at about 18 000 BP. Thereafter, continued transgressive infilling occurred to a point where an extensive lagoon and back-barrier system was established. At this point, sea levels remained static, causing the net segmentation of the system and the slow closure of the tidal basins or circular depressions. This type of seafloor topography is rarely preserved and is the result of fortuitous cementation after deposition and the later removal of sediment that would ordinarily bury such features. | |
| Publisher | AOSIS | |
| Date | 2012-07-30 | |
| Identifier | 10.4102/sajs.v108i7/8.969 | |
| Source | South African Journal of Science; Vol 108, No 7/8 (2012); 5 Pages 1996-7489 0038-2353 | |
| Language | eng | |
| Relation |
The following web links (URLs) may trigger a file download or direct you to an alternative webpage to gain access to a publication file format of the published article:
https://journals.sajs.aosis.co.za/index.php/sajs/article/view/969/1316
https://journals.sajs.aosis.co.za/index.php/sajs/article/view/969/1372
https://journals.sajs.aosis.co.za/index.php/sajs/article/view/969/1374
https://journals.sajs.aosis.co.za/index.php/sajs/article/view/969/1373
https://journals.sajs.aosis.co.za/index.php/sajs/article/downloadSuppFile/969/2851
https://journals.sajs.aosis.co.za/index.php/sajs/article/downloadSuppFile/969/4109
https://journals.sajs.aosis.co.za/index.php/sajs/article/downloadSuppFile/969/4110
https://journals.sajs.aosis.co.za/index.php/sajs/article/downloadSuppFile/969/4111
https://journals.sajs.aosis.co.za/index.php/sajs/article/downloadSuppFile/969/4112
https://journals.sajs.aosis.co.za/index.php/sajs/article/downloadSuppFile/969/4113
|
|
ADVERTISEMENT
