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L''île Foch' is one of the
Kerguelen Islands situated near to the north coast of Grand Terre, the principal island.
It is separated from this main island only by a narrow sea arm, the Tucker strait. It borders
île Saint-Lanne Gramont at the northwest, which is separated by the
Baie de Londres. At the northeast point it borders
Mc Murdo and
Howe
It is the second largest island in the archipelago (206 km²). The highest point is named
la Pyramide Mexicaine, at 687 metres.
Since it is the largest island in the archipelago with no introduced species (no rabbits, cats, mice or rats), Île Foch is used as a reference as to the original ecosystem of Kerguelen Island. To prevent any accidental introduction of species, access is highly regulated, restricted to scientific missions only.