Seismic reflection profiling and basement topography in the Somali Basin: Possible fracture zones between Madagascar and Africa
Article first published online: 20 SEP 2012
Copyright 1977 by the American Geophysical Union.
Journal of Geophysical Research
Solid Earth and Planets
Volume 82, Issue 33, pages 5305–5311, 10 November 1977
How to Cite
1977), Seismic reflection profiling and basement topography in the Somali Basin: Possible fracture zones between Madagascar and Africa, J. Geophys. Res., 82(33), 5305–5311, doi:10.1029/JB082i033p05305., and (
- Issue published online: 20 SEP 2012
- Article first published online: 20 SEP 2012
- Manuscript Accepted: 8 JUL 1977
- Manuscript Received: 4 APR 1977
Continuous seismic profiling in the western Somali Basin reveals basement topography aligned approximately north to south. We interpret three buried ridges, approximately 50 km apart, approximately parallel to the Davie Ridge in the Mozambique Channel, as fracture zones along which Madagascar moved away from Africa. These data therefore support the northern paleopositions of Madagascar suggested by du Toit  and Smith and Hallam . The ridges seem to provide an eastern barrier to sedimentation. The basement topography forming these fracture zones has a different origin from that of Chain Ridge.