Event Mont Saint-Michel coastline

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The coastline of northern France changed in the last 2000 years. Mont Saint-Minchel, now an island, was surrounded by a forest in ancient Roman times.

Chronology

Interactive Chronologies with maps are available in the section Changes Navigation

  • January 251: Starting from the 3rd century, the ground level progressively lowered, and the sea slowly engulfed the forest: according to a 15th-century manuscript, a particularly violent equinoctial tide in 709 gave the final blow to the forest.
  • January 101: At the time of the Gauls, Mont Saint-Michel, as well as the Tombelaine rock, stood within the Scissy forest and the shore still extended up to over 48 km further away, incorporating the Chausey islands.
  • January 710: Starting from the 3rd century, the ground level progressively lowered, and the sea slowly engulfed the forest: according to a 15th-century manuscript, a particularly violent equinoctial tide in 709 gave the final blow to the forest.