Seismic stratigraphy and evolution of the Raggatt Basin, southern Kerguelen Plateau

Colwell, J.B., Coffin, M.F., Pigram, C.J., Davies, H.L., Stagg, H.M.J. and Hill, P.J. (1988) Seismic stratigraphy and evolution of the Raggatt Basin, southern Kerguelen Plateau. Marine and Petroleum Geology, 5 (1), 75-81. (doi:10.1016/0264-8172(88)90041-4).

Abstract

Six major seismic stratigraphic sequences in the Raggatt Basin on the southern Kerguelen Plateau overlie a basement complex of Cretaceous or greater age. The complex includes dipping reflectors which were apparently folded and eroded before the Raggatt Basin developed. The seismic stratigraphic sequences include a basal unit F, which fills depressions in basement; a thick unit, E, which has a mounded upper surface (volcanic or carbonate mounds); a depression-filling unit, D; a thick unit C which is partly Middle to Late Eocene; and two post-Eocene units, A and B, which are relatively thin and more limited in areal extent than the underlying sequences. A mid or Late Cretaceous erosional episode was followed by subsidence and basin development, interrupted by major erosion in the mid Tertiary. Late Cenozoic sedimentation was affected by vigorous ocean currents.

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