Geologic and geomorphological conditions of mangrove coast development of the Guinea Republic

Abstract

General regularities are stated of the structure and formation of mangrove coasts of Guinea. Geomorphologic role of mangroves is noted which stabilize coasts, control tidal waves, favour accumulation of sand and clay and lessen sea abrasion. Mangroves have been known to exist since Paleogene, they developed during the periods of both considerable regressions (100-110 meters below the present-day sea level) and transgressions (up to 25-50 meters above the present-day sea level). Shift of the mangrove area during that time amounts to 100 kilometers and more.