Redmond Formation
{{Short description|Geologic formation in Newfoundland and Labrador, Canada}}
{{Infobox rockunit
| name = Redmond Formation
| image = Geologic map of Redmond and Sokoman Formations, Canada with outcrops of Redmond Formation.jpg
| caption = Geologic map and outcrops of Redmond Formation
| type = Formation
| age = Early Cenomanian
{{fossil range|99.7|94.3}}
| period = Cenomanian
| prilithology = Argillite
| otherlithology =
| namedfor = Redmond No. 1 mine
| namedby =
| year_ts =
| region = Newfoundland and Labrador
| country = Canada
| coordinates = {{coord|54.7|N|66.8|W|display=inline,title}}
| paleocoordinates = {{coord|46.4|N|27.3|W|display=inline}}
| unitof =
| subunits =
| underlies = Glacial deposits
| overlies = Sokoman Formation
| thickness = Up to {{convert|1.5|m|ft|abbr=on}}
| extent = Redmond Basin
| area =
| map = {{Location map+ | Canada
| relief = 1
| width = 300
| float = center
| places =
{{Location map~ | Canada
| lat_deg = 54.7
| lon_deg = -66.8
| mark = Lightgreen pog.svg
| marksize = 12
}}
}}
| map_caption =
}}
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 {{convert|1.5|m|ft}} thick) and restricted unit traced for {{convert|152|m|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.Demers Potvin & Larsson, 2019
Fossil content
= Animals =
== [[Mesoraphidiidae]] ==
== [[Mayfly|Ephemeroptera]] ==
- Alatuscapillus icarus
- Cruscolli sheppardae
- Protoligoneuria borealis{{Cite journal |last1=Mueller |first1=André S. |last2=Demers-Potvin |first2=Alexandre V. |date=2024-06-01 |title=New Late Cretaceous (Cenomanian) fossil mayfly nymphs (Oligoneuriidae, Heptageniidae, Hexagenitidae) from the Redmond Formation, Labrador, Canada |url=https://cdnsciencepub.com/doi/10.1139/cjes-2023-0133 |journal=Canadian Journal of Earth Sciences |language=en |volume=61 |issue=6 |pages=712–722 |doi=10.1139/cjes-2023-0133 |bibcode=2024CaJES..61..712M |issn=0008-4077|url-access=subscription }}
== [[Antlion|Palaeoleontidae]] ==
== Susumaniidae ==
== [[Beetle|Coleoptera]] ==
- Coleoptera indet.
== Labradorocoleidae ==
== [[Cupedidae]] ==
- Cupedidae indet.
- Haliplidae indet.
- Peltodytes sp.
== [[Tettigarctidae]] ==
== [[Dictyoptera]] ==
= Plants =
- Andromeda sp.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
- A. novaecaesarae
- A. parlatorii
- ‘Aralia’ groenlandica
- Araliopsoides cretacea
- Celastrophyllum sp.
- C. albaedomus
- C. brittonianum
- Cissites sp.
- Crassidenticulum sp.
- Daphnophyllum dakotense
- ‘Densinervum’ kauli
- Dicotylophyllum sp.
- Diospyros primaeva
- Dryandroides lanceolata
- Dryandroides sp.
- Ficus berthoudi
- Liriodendron simplex
- Liriodendropsis simplex
- Magnolia
- Magnolia sp.
- Magnolia amplifolia
- Menispermites sp.
- M. obtusiloba
- M. trilobatus
- Platanus sp.
- P. heerii
- P. shirleyensis
- Salix newberryana
- Sassafras acutilobum
- ‘Sterculia’ lugubris
See also
References
{{Reflist|2}}
= Bibliography =
- {{citation |last1=Demers Potvin |first1=Alexandre |last2=Szwedo |first2=Jacek |last3=Paragnani |first3=Cassia |last4=Larsson |first4=Hans |year=2020 |title=First North American occurrence of hairy cicadas discovered in a Late Cretaceous Cenomanian exposure from Labrador, Canada |url=https://www.app.pan.pl/archive/published/app65/app006692019.pdf |journal=Acta Palaeontologica Polonica |volume=65 |pages=85–98 |accessdate=2020-07-31}}
- {{citation |last1=Demers Potvin |first1=Alexandre V. |last2=Larsson |first2=Hans C.E. |year=2019 |title=Palaeoclimatic reconstruction for a Cenomanian-aged angiosperm flora near Schefferville, Labrador |url=https://onlinelibrary.wiley.com/doi/abs/10.1111/pala.12444 |journal=Palaeontology |volume=62 |issue=6 |pages=1027–1048 |doi=10.1111/pala.12444 |bibcode=2019Palgy..62.1027D |issn=0031-0239}}
Category:Geologic formations of Newfoundland and Labrador
Category:Cretaceous Newfoundland and Labrador
Category:Shale formations of Canada