MARIANNE

Marianne is just under 2 kilometres long and 700 metres wide and is located about 7 km east of La Digue and 3.8 km from Felicite Island. Marianne Island is the twelfth largest (94.7 HA) granitic island in the Seychelles.

The highest peak of the island is the Morne Estel with 130 meters. A second lower peak (about 85 m) appears in the south. The largest part of the island is slightly sloping land below 50 m.
The island consists of porphyric granite, which is slightly different from the other islands of the Praslin / La Digue group. To the northwest, the island is crossed by a dike of densely structured metadolerite rock. On the northern slopes of the island brown earthy rocks appear, which are formed by the deposition of guano on granite soils. On the west side of the island there is a small "plateau" with a fringing reef. The plateau consists of newer calcareous sediments and swamp deposits. The gentle slopes of the island have allowed red soil to accumulate everywhere, with the exception of some coastal areas where little or no soil is present.

The fresh water on the island is limited, especially during the dry season. On the site of the former main settlement (La Cour) there are two shallow wells. A large part of the plateau is covered with swamp vegetation (mainly sedge and ludia).