distance from its outer margin to the shore increases from
2 km in the north to 9 km in the south. The lagoon has an
average depth of 10 m, and is connected to the open ocean
in the north and south by channels 15 and 20 m deep
respectively (Pichon, 1971). Towards the south, small
fringing reefs occur between the mainland and Grand
Récif. Pichon (1964, 1978) distinguished seven reef zones
across Grand Récif, which are from west to east (1) outer
Indian Ocean Reefs, Figure 4 Map of Mayotte (from Zinke et al., 2001).
INDIAN OCEAN REEFS
589
2 km in the north to 9 km in the south. The lagoon has an
average depth of 10 m, and is connected to the open ocean
in the north and south by channels 15 and 20 m deep
respectively (Pichon, 1971). Towards the south, small
fringing reefs occur between the mainland and Grand
Récif. Pichon (1964, 1978) distinguished seven reef zones
across Grand Récif, which are from west to east (1) outer
Indian Ocean Reefs, Figure 4 Map of Mayotte (from Zinke et al., 2001).
INDIAN OCEAN REEFS
589