Renews Head Formation
| Renews Head Formation | |
|---|---|
| Stratigraphic range: | |
| Type | Formation |
| Unit of | St John's Group[1] |
| Underlies |
|
| Overlies | Fermeuse Formation |
| Lithology | |
| Primary | Dark-gray Sandstone[3] |
| Other | Minor Shale[3] |
| Location | |
| Region | Newfoundland |
| Country | Canada |
Outcrop occurrence | |
The Renews Head Formation is a geologic formation in Newfoundland and Labrador. It preserves fossils dating back to the Ediacaran period.
Geology
The Renews Head Formation is primarily composed of laminated dark-gray silty sandstones which weathers to a rusty-brown, alongside thin to medium-bedded sandstones containing minor black shales throughout.[3][4] There are also thick, cross-bedded laminated gray sandstones, which are structureless in nature, and are inter-bedded with more black shales and thin sandstones.[4] With this, it has been suggested that these layers were deposited in a delta-front environment.[4]
It is overlain by the Cappahayden Formation near the town of Ferryland, and the Gibbett Hill Formation near the city of St. John's.[2] Meanwhile the formation is gradationally and conformably underlain by the Fermeuse Formation.[2][4][5]
Paleobiota
The Renews Head Formation is home to a small range of discoidal forms, like Aspidella, which have been noted to bear faint radial markings similar to Hiemalora.[4][6] There are also unnamed Sphaeromorph Acritarchs known from this formation.[7]
incertae sedis
| Genus | Species | Notes | Images |
|---|---|---|---|
| Aspidella[4] |
|
Enigmatic discoidal fossil. Specimens from this formation have faint Hiemalora-like radial markings. |
Microorganisms
| Genus | Species | Notes | Images |
|---|---|---|---|
| Sphaeromorph Acritarchs[7] |
|
Acritarchs. |
See also
Bibliography
- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Archived from the original on 19 August 2022. Retrieved 17 December 2021.
References
- ^ A.G. Liu; D. McIlroy (September 2014). "Horizontal Surface Traces from the Fermeuse Formation, Ferryland (Newfoundland, Canada), and their Place within the Late Ediacaran Ichnological Revolution" (PDF). Geological Association of Canada - Special Paper (9).
- ^ a b c d "Geoscience Atlas". Geological Survey Division of the Department of Natural Resources, Government of Newfoundland and Labrador.
- ^ a b c "GEOLOGY OF THE AVALON PENINSULA, NEWFOUNDLAND" (PDF).
- ^ a b c d e f Hofmann, H. J.; O'Brien, S. J.; King, A. F. (January 2008). "Ediacaran biota on Bonavista Peninsula, Newfoundland, Canada". Journal of Paleontology. 82 (1): 1–36. doi:10.1666/06-087.1.
- ^ Gehling, James G.; Narbonne, Guy M.; Anderson, Michael M. (September 2000). "The first named Ediacaran body fossil, Aspidella Terranovica". Palaeontology. 43 (3): 427–456. Bibcode:2000Palgy..43..427G. doi:10.1111/j.0031-0239.2000.00134.x.
- ^ Gehling, James G.; Narbonne, Guy M.; Anderson, Michael M. (September 2000). "The first named Ediacaran body fossil, Aspidella Terranovica". Palaeontology. 43 (3): 427–456. doi:10.1111/j.0031-0239.2000.00134.x.
- ^ a b O’Brien, S.J.; King, A.F. "EDIACARAN FOSSILS FROM THE BONAVISTA PENINSULA (AVALON ZONE), NEWFOUNDLAND: PRELIMINARY DESCRIPTIONS AND IMPLICATIONS FOR REGIONAL CORRELATION" (PDF). Newfoundland Department of Mines and Energy. Geological Survey.