Redmond Formation
The Redmond Formation is a geologic formation in Newfoundland and Labrador. It preserves fossils dating back to the Cretaceous period. It was a thin (up to 1.5 metres (4.9 ft) thick) and restricted unit traced for 152 metres (499 ft) in a single mine (Redmond No. 1) in Labrador, overlying Paleoproterozoic rocks, with large amounts of rubble, probably as a result of graben subsidence within the Labrador trough. Argillite facies within the formation have produced a diverse flora and insect assemblage.[1]
| Redmond Formation Stratigraphic range: Early Cenomanian 99.7–94.3 Ma | |
|---|---|
 Geologic map and outcrops of Redmond Formation | |
| Type | Formation |
| Underlies | Glacial deposits |
| Overlies | Sokoman Formation |
| Thickness | Up to 1.5 m (4.9 ft) |
| Lithology | |
| Primary | Argillite |
| Location | |
| Coordinates | 54.7°N 66.8°W |
| Approximate paleocoordinates | 46.4°N 27.3°W |
| Region | Newfoundland and Labrador |
| Country | .svg.png){kind=small} |
| Extent | Redmond Basin |
| Type section | |
| Named for | Redmond No. 1 mine |
  Redmond Formation (Canada) | |
Fossil content
Mesoraphidiidae
- Alloraphidia dorfi
Palaeoleontidae
- Palaeoleon ferrogeneticus
Susumaniidae
- Palaeopteron complexum
Coleoptera
- Coleoptera indet.
Labradorocoleidae
- Labradorocoleus carpenteri
Cupedidae
- Cupedidae indet.
- Haliplidae indet.
- Peltodytes sp.
Tettigarctidae
- Maculaferrum blaisi[2]
Isoptera
- Cretatermes carpenteri
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References
- Demers Potvin & Larsson, 2019
- Demers Potvin et al., 2020
Bibliography
- Demers Potvin, Alexandre; Jacek Szwedo; Cassia Paragnani, and Hans Larsson. 2020. First North American occurrence of hairy cicadas discovered in a Late Cretaceous Cenomanian exposure from Labrador, Canada. Acta Palaeontologica Polonica 65. 85–98. Accessed 2020-07-31.
- Demers Potvin, Alexandre V., and Hans C.E. Larsson. 2019. Palaeoclimatic reconstruction for a Cenomanian‐aged angiosperm flora near Schefferville, Labrador. Palaeontology 62. 1027–1048. doi:10.1111/pala.12444 ISSN 0031-0239
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