Cape Verde Islands

The geological structure of these islands, there is an important feature: they are formed not only by volcanic products, as well as gneisses and other crystalline schists, ancient limestone, diorite, syenite and diabase. Hence it is natural to assume that the Cape Verde Islands represent the remainder of the disappeared continent. Some of them are huge cone on the other, apparently, has never manifested itself more or less strong volcanic activity. Among all the islands of Fogo has only one active volcano, all the rest belong to extinct. Finally, there are reports that the islands off the coast of Sierra Leone are volcanic in nature and that a few further south, at 7 ° C. sh. and the 4th century. forth from Ferro occurred in 1824 underwater eruption. In the western Atlantic Ocean, we find little volcanoes. Has been said that on the east coast of America and no traces of volcanic eruptions. Aside from the island of Fernando Noronyu lying 3 ° 50 'th. sh., 45 geographical miles from Cape St. Roch in Brazil, you have to explicitly point out the West Indian islands, as one of the volcanic areas. In 1837, 24 November underwater eruption occurred near the Bahamas. Particularly noteworthy are the volcanic Lesser Antilles, located in a curved series between Venezuela and Puerto Rico. With regard to ostrovov1 Granada, St. Vincent, Santa Lucia, Martinique, Dominica, Guadeloupe, Monferrato, Nevis, St. Christopher and St. Eustace, they all owe their origin to the latest volcanic eruptions on the islands as St. Vincent, St.Lucia, Martinique, Guadeloupe and St. Christopher erupts and during the last centuries. Especially intriguing Soufriere Hills volcano in Guadeloupe, he threw lava with selected quartz grains.