The Redmond Formation is a geologic formation in Newfoundland and Labrador. It preserves fossils dating back to the mid-Cretaceous (Cenomanian). 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
TypeFormation
UnderliesGlacial deposits
OverliesSokoman Formation
ThicknessUp to 1.5 m (4.9 ft)
Lithology
PrimaryArgillite
Location
Coordinates54°42′N 66°48′W / 54.7°N 66.8°W / 54.7; -66.8
Approximate paleocoordinates46°24′N 27°18′W / 46.4°N 27.3°W / 46.4; -27.3
RegionNewfoundland and Labrador
Country Canada
ExtentRedmond Basin
Type section
Named forRedmond No. 1 mine
Redmond Formation is located in Canada
Redmond Formation
Redmond Formation (Canada)

Fossil content

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Susumaniidae

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  • Coleoptera indet.

Labradorocoleidae

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See also

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References

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  1. ^ Demers Potvin & Larsson, 2019
  2. ^ Mueller, André S.; Demers-Potvin, Alexandre V. (2024-06-01). "New Late Cretaceous (Cenomanian) fossil mayfly nymphs (Oligoneuriidae, Heptageniidae, Hexagenitidae) from the Redmond Formation, Labrador, Canada". Canadian Journal of Earth Sciences. 61 (6): 712–722. Bibcode:2024CaJES..61..712M. doi:10.1139/cjes-2023-0133. ISSN 0008-4077.
  3. ^ Demers Potvin et al., 2020

Bibliography

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