Transport in the Gambia excellent condition. The Gambia River not only provides important internal transport but is also an international commercial link. Oceangoing vessels can travel 240 km upstream. In 2004 there were 390 km of total waterways. Banjul, the principal port, receives about 300 ships annually. Ferries operate across the river and between Banjul and Barra. With the construction of major all-weather roads on both sides of the Gambia River, the waterway has become less significant for passenger traffic. Waterways: 390 km (small ocean-going vessels can reach 190 km) (2008) <br>"country comparison to the world:" 90 Ports and harbours: Banjul, Gambia Ports Authority
Geology of the Central African Republic Southern Hemisphere as part of the supercontinents Gondwana and Pangaea. Many aspects of Central African Republic’s geologic history remain unknown. Along with the Brazilian state of Bahia, CAR is the only country known to host carbonados (black diamond aggregates), which some researchers have suggested may be connected to a Precambrian meteorite impact that could also have generated the Bangui magnetic anomaly. Up to 60% of bedrock beneath the Central African Republic dates to the Precambrian. Much of the country is situated in the Archean Congo Craton. The North Equatorial Fold Belt, Pan-African granulites and greenstone belts are found in the