Manuels River Formation is a Middle Cambrian (Drumian) geological formation cropping out in the Random Island area of Newfoundland[1] and elsewhere?.

Its black/dark brown, finely laminated mudstones and thicker-bedded siltstones are occasionally interrupted by thin yellowish silty limestone horizons.

Recorded fossils include Clarella venusta (Billings, 1872) and Mawddachites hicksii (Salter, 1864).

[1] Inlet Group This article about a specific Canadian geological feature is a stub.

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