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- W2090250609 abstract "Abstract A variety of geomorphic features occurs on the continental shelf from Portuguese Guinea to Sierra Leone. On the north the Bissagos Delta, an ancient but active delta, reaches the shelf edge. pre-Holocene drowned subparallel channels are associated with two relict shelf edge deltas in the central portion but lead directly into submarine canyons on the south. A pre-Holocene drowned spit (St. Ann's Shoal) trends northwest from the Sierra Leone coast to the outer shelf. Major pre-Holocene and Holocene stillstands are indicated by remnant barrier spits, barrier island-lagoon complexes, and sea cliffs at −90, −80, −55, −45, −35, and −25-m levels. Irregular “V” shaped shelf edge features, the tops of which lie at the general depths of −90 and −80 m, appear to represent remnant lithified shoreline forms capped with calcareous algal accretions on favored exposures. An 18,750-year B.P. coral Porites bernardi ( Gravier ) contained in an algal rock broken from a 103–111 m exposure on the seaward slope of a shelf edge feature grew during the pre-Holocene regression or after an early advance of the Holocene transgression." @default.
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- W2090250609 title "Continental shelf geomorphic features off Portuguese Guinea, Guinea, and Sierra Leone (West Africa)" @default.
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