Overview
Silhouette Island lies 20 km northwest of Mahé in Seychelles. It is the third-largest granitic island in Seychelles.
Description
Silhouette lies 20 km north of Mahé and at 1,995ha it is the third-largest island of the granitic group and the fifth largest in Seychelles as a whole, yet the human impact is much less significant than elsewhere. Mount Dauban rises to 740 meters and is the second-highest summit in Seychelles. Though superficially similar to the other granitic islands, much of Silhouette (and North Island) is made up of younger rock called syenite and dated from 63 million years ago, compared to 750 million years for the other granitic islands. The silhouette may have been born in rapid and dramatic style, in a manner similar to the famous eruption of Mount St Helens that took place in the western United States in 1980. It is probable that the crater lies southeast of La Passe, now almost entirely eroded away and submerged.
Victoria La Digue
Seychelles
URL:
http://leisurecrew.com/place/location/seychelles/silhouette-island