Magdalen Islands

The Magdalen Islands (French: Îles de la Madeleine, pronounced [il də la madlɛn]) are a Canadian archipelago in the Gulf of St. Lawrence.

Both sandstones were formed in the Permian period when the island was a desert, and in 2026 were found to preserve fossils of plants and tracks and burrows of burrowing animals.

Both sandstones were formed in the Permian period when the island was a desert, and in 2026 were found to preserve fossils of plants and tracks and burrows of burrowing animals.

Where volcanic effusions have come into contact with sandstones, large masses of gypsum are found.

The Magdalen Islands (French: Îles de la Madeleine, pronounced [il də la madlɛn]) are a Canadian archipelago in the Gulf of St. Lawrence

Finally, volcanic actions created rounded, symmetrical domes like breasts, which were given the name of Demoiselles (or "young ladies"), though this is disputed.

They are subject to rapid erosion (often more than 1 metre, 3 ft 3 in per year) due to the action of frost, ice, waves and sea spray that make numerous openings while undermining their base.