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Redmond Formation
Stratigraphic range: Early Cenomanian 99.7–94.3 Ma PreꞒ Ꞓ O S D C P T J K Pg N
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°42′N 66°48′W / 54.7°N 66.8°W / 54.7; -66.8
Approximate paleocoordinates	46°24′N 27°18′W / 46.4°N 27.3°W / 46.4; -27.3
Region	Newfoundland and Labrador
Country	Canada
Extent	Redmond Basin
Type section
Named for	Redmond No. 1 mine
Redmond Formation (Canada)

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.

Fossil content

Mesoraphidiidae

• Alloraphidia dorfi

Ephemeroptera

• Alatuscapillus icarus
• Cruscolli sheppardae
• Protoligoneuria borealis

Palaeoleontidae

• Palaeoleon ferrogeneticus

Susumaniidae

• Palaeopteron complexum

Coleoptera

• Coleoptera indet.

Labradorocoleidae

• Labradorocoleus carpenteri

Cupedidae

• Cupedidae indet.
• Haliplidae indet.
• Peltodytes sp.

Tettigarctidae

• Maculaferrum blaisi

Dictyoptera

• Cretatermes carpenteri
• Labradormantis guilbaulti

See also

• List of fossiliferous stratigraphic units in Newfoundland and Labrador

References

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

• Demers Potvin, Alexandre; Szwedo, Jacek; Paragnani, Cassia; Larsson, Hans (2020), "First North American occurrence of hairy cicadas discovered in a Late Cretaceous Cenomanian exposure from Labrador, Canada" (PDF), Acta Palaeontologica Polonica, 65: 85–98, retrieved 2020-07-31
• Demers Potvin, Alexandre V.; Larsson, Hans C.E. (2019), "Palaeoclimatic reconstruction for a Cenomanian-aged angiosperm flora near Schefferville, Labrador", Palaeontology, 62 (6): 1027–1048, Bibcode:2019Palgy..62.1027D, doi:10.1111/pala.12444, ISSN 0031-0239

• Geologic formations of Newfoundland and Labrador
• Cretaceous Newfoundland and Labrador
• Cenomanian Stage
• Shale formations
• Shallow marine deposits
• Paleontology in Newfoundland and Labrador