Corsica and killings culminated in the assassination of Prefect Claude Érignac in 1998. In 2013, Corsica hosted the first three stages of the 100th Tour de France, which passed through the island for the first time in the event's 110-year history. Corsica was formed about 250 million years ago with the uplift of a granite backbone on the western side. About 50 million years ago sedimentary rock was pressed against this granite, forming the schists of the eastern side. It is the most mountainous island in the Mediterranean, a "mountain in the sea". It is also the fourth largest island in
Corsica, Pennsylvania Corsica, Pennsylvania Corsica is a borough in Jefferson County, Pennsylvania, United States. The population was 357 at the 2010 census. It was named for the island of Corsica, birthplace of Napoleon Bonaparte. The mayor of the borough is Dave Leadbetter. Corsica is located in western Jefferson County at (41.181233, -79.202287). Its western border is the Clarion County line. U.S. Route 322 passes through the center of town as Main Street, and leads east to Brookville, the Jefferson county seat, and west to Clarion. Interstate 80 passes just north of the borough limits, with access from Exit 73 (Pennsylvania Route 949).