Martinique
Relief

The terrain is mountainous on this island of volcanic origin. The oldest areas correspond to the volcanic zones at the southern end of the island and towards the peninsula of La Caravelle to the east. The island developed over the last 20 million years according to a sequence of movements and volcanic eruptions to the north.

The volcanic activity is due to the subduction fault located here, where the South American Plate slides beneath the Caribbean Plate. Martinique has eight centres of volcanic activity. The oldest rocks are andesitic lavas dated to about 24 million years ago, mixed with tholeiitic magma containing iron and magnesium. Mount Pelée, the island's most dramatic feature, formed about 400,000 years ago. Pelée erupted in 1792, 1851, and twice in 1902. The eruption of 8 May 1902, destroyed Saint-Pierre and killed 28,000 people in 2 minutes; that of 30 August 1902, killed nearly 1,100, mostly in Le Morne-Rouge and Ajoupa-Bouillon.

The east coast, coast of the wind or of the islands, has been called in the Caribbean " cabesterre ". This term in Martinique designates more specifically the area of La Caravelle. This windward coast, bordered by the Atlantic Ocean, is directly exposed to the trade winds and the sea bottom. The northern part of the Grand River in Sainte-Marie is basically surrounded by cliffs, with very few mooring points; access to maritime navigation is limited to inshore fishing with small traditional Martinique boats.
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