| Fermeuse Formation | |
| Type: | Formation |
| Period: | Ediacaran |
| Region: | Newfoundland and Labrador |
| Country: | Canada |
| Unitof: | St John's Group[1] |
| Underlies: | Renews Head Formation[2] |
| Overlies: | Trepassey Formation |
| Map: | Fermeuse Formation map.svg |
The Fermeuse Formation is a fossil-bearing Ediacaran geologic formation in Newfoundland.
On Avalon Peninsula[1] there is low diversity, and includes rare trace fossils, Palaeopascichnus,[3] and Aspidella discs, sometimes in great concentrations.[4]
On Bonavista Peninsula there is higher diversity, including more fronds (rangeomorphs) and better preserved than on Avalon Peninsula.[1]
On Bonavista Peninsula the depositional environment was a slope and outer shelf–below photic zone Turbidites probably were the dominant sediment transporters.[4]
It is predominantly silts and sands, in contrast to underlying Trepassey Formation, which is mostly dark grey shales. There is a coarsening up sequence throughout the two formations, such that the top of the Fermeuse is predominantly sandstones.[4]
On Avalon Peninsula there were much shallower waters, particularly than in underlying Mistaken Point Formation and Trepassey Formation.[1] It is indicated by sandy channel fills, slumping, occasional silts.[1] There is a possible delta front and shallow slope setting.[1]