Manuels River Formation

Manuels River Formation is a Middle Cambrian (Drumian) geological formation cropping out in the Random Island area of Newfoundland and elsewhere?. Its black/dark brown, finely laminated mudstones and thicker-bedded siltstones are occasionally interrupted by thin yellowish silty limestone horizons.
Fossil content.
Recorded fossils include "Clarella venusta" (Billings, 1872) and "Mawddachites hicksii" (Salter, 1864).