Redmond Formation

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
Geologic map and outcrops of Redmond Formation
TypeFormation
UnderliesGlacial deposits
OverliesSokoman Formation
ThicknessUp to 1.5 m (4.9 ft)
Lithology
PrimaryArgillite
Location
Coordinates54.7°N 66.8°W / 54.7; -66.8
Approximate paleocoordinates46.4°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

Mesoraphidiidae

  • Alloraphidia dorfi

Palaeoleontidae

  • Palaeoleon ferrogeneticus

Susumaniidae

  • Palaeopteron complexum

Coleoptera

  • Coleoptera indet.

Labradorocoleidae

  • Labradorocoleus carpenteri

Cupedidae

Tettigarctidae

  • Maculaferrum blaisi[2]

Dictyoptera

  • Cretatermes carpenteri
  • Labradormantis guilbaulti

See also

References

  1. Demers Potvin & Larsson, 2019
  2. 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(6). 1027–1048. . doi:10.1111/pala.12444 ISSN 0031-0239
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.