The Cappahayden Formation is an

Ediacaran The Ediacaran ( ) is a geological period of the Neoproterozoic geologic era, Era that spans 96 million years from the end of the Cryogenian Period at 635 Million years ago, Mya to the beginning of the Cambrian Period at 538.8 Mya. It is the last ...

formation cropping out in

Newfoundland Newfoundland and Labrador is the easternmost province of Canada, in the country's Atlantic region. The province comprises the island of Newfoundland and the continental region of Labrador, having a total size of . As of 2025 the population ...

. It comprises fine grey sandstones/siltstones with very fine black parallel laminations, rarely with crossbedding.

References

{{Canada-geologic-formation-stub Ediacaran Newfoundland and Labrador Geologic formations of Newfoundland and Labrador Siltstone formations of Canada