Trepassey Formation

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Trepassey Formation
Stratigraphic range: Ediacaran 565–560 Ma
↓
TypeFormation
Unit ofSt John's Group[1][2]
Sub-unitsPort Union and Catalina Members [3]
UnderliesFermeuse Formation[2]
OverliesMistaken Point Formation[4][2]
Thickness300 m (984 ft)
Lithology
PrimaryGray Sandstone[2]
OtherShale, Tuff[2]
Location
RegionNewfoundland
CountryCanada
File:Trepassey formation map.svg
Occurrence in southeast NL

The Trepassey Formation is a geologic formation that crops out in Newfoundland, which consists of gray sandstones and tuffaceous rocks.[2] It preserves fossils dating back to the Ediacaran period.

Paleobiota

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Like the other overlying and underlying formations, the Trepassey Formation represents a rare deep-marine paleoenviroment, situated on a slope,[5] which was home to various sessile forms, like the petalonamids Fractofusus and Trepassia, and even rare examples of life, like the staurozoan cnidarian Mamsetia, previously the paratype of Haootia.[6]

Color key
Taxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon Ootaxon Morphotaxon
Notes
Uncertain or tentative taxa are in small text; crossed out taxa are discredited.

Petalonamae

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Genus Species Notes Images
Arborea[7]
  • A. spinosa
 Sessile frondose organism, A. spinosa was previously described as a species of Charniodiscus.[8]
File:Charniodiscus arboreus (TMP 1993.140.0001), Royal Tyrrell Museum, Drumheller, Alberta, 2025-07-13.jpg
Avalofractus[9][10]
  • A. abaculus
 Sessile frondose organism.
Beothukis[9][10]
  • B. mistakensis
 Sessile frondose organism.
Bradgatia[10][8]
  • B. linfordensis
 Sessile frondose organism.
File:Bradgatia.svg
Charnia[9][10][8]
  • C. masoni
 Sessile frondose organism.
File:Charnia.png
Charniodiscus[10][8]
  • Charniodiscus sp.
  • C. procerus
 Sessile frondose organism.
File:Charniodiscus.png
Fractofusus[8]
  • F. andersoni
 Sessile spindle-like frondose organism.
File:Fractofusus misrai.jpg
Primocandelabrum[8]
  • Primocandelabrum sp.
 Sessile frondose organism.
File:Primocandelabrum.jpg
Trepassia[9][10]
  • T. wardae
 Sessile frondose organism.
File:Trepassia wardae fossil.png
Vinlandia[11]
  • V. antecedens
 Sessile frondose organism, previously reported as a species of Charnia.[8]

Cnidaria

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Genus Species Notes Images
Haootia[12]
  • H. quadriformis
 Staurozoan cnidarian.
File:Haootia reconstruction 2024.jpg
Mamsetia[6]
  • M. manunis
 Staurozoan cnidarian.

incertae sedis

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Genus Species Notes Images
Aspidella[8][13]
  • A. terranovica
 Enigmatic discoidal fossil.
File:Aspidella surface.jpg
Hadrynichorde[8]
  • H. catalinensis.
 Sea Whip-like frondose organism.
Palaeopascichnus[1][14]
  • Palaeopascichnus sp.
 Palaeopascichnid organism.
File:Palaeopascichnus CU21.png

Ivesheadiomorphs

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Genus Species Notes Images
Ivesheadia[8]
  • I. lobata
 Poorly preserved organism.
Blackbrookia[8]
  • Blackbrookia sp.
 Poorly preserved organism.

Ichnogenera

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Genus Species Notes Images
Neonereites[14]
  • Neonereites sp.
 Burrows.
File:Neonereites uniserialis Punta San García 01.JPG

See also

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References

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  1. ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).[dead link]
  2. ^ a b c d e f Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  3. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  4. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  5. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  6. ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  7. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  8. ^ a b c d e f g h i j k Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  9. ^ a b c d Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  10. ^ a b c d e f Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  11. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
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  13. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  14. ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  • Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
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