Earth:Redmond Formation

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Short description: Geologic formation in Newfoundland and Labrador, Canada
Redmond Formation
Stratigraphic range: Early Cenomanian
99.7–94.3 Ma
Geologic map of Redmond and Sokoman Formations, Canada with outcrops of Redmond Formation.jpg
Geologic map and outcrops of Redmond Formation
TypeFormation
UnderliesGlacial deposits
OverliesSokoman Formation
ThicknessUp to 1.5 m (4.9 ft)
Lithology
PrimaryArgillite
Location
Coordinates [ ⚑ ] : 54°42′N 66°48′W / 54.7°N 66.8°W / 54.7; -66.8
Paleocoordinates [ ⚑ ] 46°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)

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]

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

  • List of fossiliferous stratigraphic units in Newfoundland and Labrador

References

  1. Demers Potvin & Larsson, 2019
  2. Demers Potvin et al., 2020

Bibliography