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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

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
Avalofractus[7][8]
  • A. abaculus
Sessile frondose organism.
Beothukis[7][8]
  • B. mistakensis
Sessile frondose organism.
Bradgatia[8]
  • Bradgatia sp.
Sessile frondose organism.
Charnia[7][8]
  • C. masoni
Sessile frondose organism.
Charniodiscus[8]
  • C. procerus
Sessile frondose organism.
Fractofusus[9]
  • Fractofusus sp.
Sessile spindle-like frondose organism.
Trepassia[7][8]
  • T. wardae
Sessile frondose organism.

Cnidaria

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Genus Species Notes Images
Haootia[10]
  • H. quadriformis
Staurozoan cnidarian.
Mamsetia[6]
  • M. manunis
Staurozoan cnidarian.

incertae sedis

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Genus Species Notes Images
Aspidella[9][11]
  • A. terranovica
Enigmatic discoidal fossil.
Hadrynichorde[9]
  • H. avlonica.
Sea Whip-like frondose organism.
Palaeopascichnus[1][12]
  • Palaeopascichnus sp.
Palaeopascichnid organism.

Ivesheadiomorphs

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Genus Species Notes Images
Ivesheadia
  • Ivesheadia sp.
Poorly preserved organism.

Ichnogenera

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Genus Species Notes Images
Neonereites[12]
  • Neonereites sp.
Burrows.

See also

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References

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  1. ^ a b A.G. Liu; D. McIlroy (September 2014). "Horizontal Surface Traces from the Fermeuse Formation, Ferryland (Newfoundland, Canada), and their Place within the Late Ediacaran Ichnological Revolution" (PDF). Geological Association of Canada - Special Paper (9).[dead link]
  2. ^ a b c d e f "GEOLOGY OF THE AVALON PENINSULA, NEWFOUNDLAND" (PDF).
  3. ^ Liu, Alexander G.; Matthews, Jack J.; McIlroy, Duncan (January 2016). "The B eothukis / C ulmofrons problem and its bearing on E diacaran macrofossil taxonomy: evidence from an exceptional new fossil locality". Palaeontology. 59 (1): 45–58. doi:10.1111/pala.12206.
  4. ^ "Newfoundland and Labrador Map". Geoscience Atlas. Retrieved 2024-07-22.
  5. ^ Wood, Donald A; Dalrymple, Robert W; Narbonne, Guy M; Gehling, James G; Clapham, Matthew E (1 October 2003). "Paleoenvironmental analysis of the late Neoproterozoic Mistaken Point and Trepassey formations, southeastern Newfoundland". Canadian Journal of Earth Sciences. 40 (10): 1375–1391. doi:10.1139/e03-048.
  6. ^ a b McIlroy, D.; Pasinetti, G.; Pérez-Pinedo, D.; McKean, C.; Dufour, S. C.; Matthews, J. J.; Menon, L. R.; Nicholls, R.; Taylor, R. S. (September 2024). "The Palaeobiology of Two Crown Group Cnidarians: Haootia quadriformis and Mamsetia manunis gen. et sp. nov. from the Ediacaran of Newfoundland, Canada". Life. 14 (9): 1096. Bibcode:2024Life...14.1096M. doi:10.3390/life14091096. ISSN 2075-1729. PMC 11432848. PMID 39337880.
  7. ^ a b c d Narbonne, Guy M.; Laflamme, Marc; Greentree, Carolyn; Trusler, Peter (July 2009). "Reconstructing a lost world: Ediacaran rangeomorphs from Spaniard's Bay, Newfoundland". Journal of Paleontology. 83 (4): 503–523. doi:10.1666/08-072R1.1.
  8. ^ a b c d e f Mckean, Christopher; Taylor, Rod S.; Mcilroy, Duncan (December 2023). "New taphonomic and sedimentological insights into the preservation of high-relief Ediacaran fossils at Upper Island Cove, Newfoundland". Lethaia. 56 (4): 1–17. doi:10.18261/let.56.4.2.
  9. ^ a b c Hofmann, H. J.; O'Brien, S. J.; King, A. F. (January 2008). "Ediacaran biota on Bonavista Peninsula, Newfoundland, Canada". Journal of Paleontology. 82 (1): 1–36. doi:10.1666/06-087.1.
  10. ^ Liu, Alexander G.; Matthews, Jack J.; Menon, Latha R.; McIlroy, Duncan; Brasier, Martin D. (22 October 2014). "Haootia quadriformis n. gen., n. sp., interpreted as a muscular cnidarian impression from the Late Ediacaran period (approx. 560 Ma)". Proceedings of the Royal Society B: Biological Sciences. 281 (1793): 20141202. doi:10.1098/rspb.2014.1202. PMC 4173675.
  11. ^ Gehling, James G.; Narbonne, Guy M.; Anderson, Michael M. (September 2000). "The first named Ediacaran body fossil, Aspidella Terranovica". Palaeontology. 43 (3): 427–456. doi:10.1111/j.0031-0239.2000.00134.x.
  12. ^ a b Liu, Alexander G.; Kenchington, Charlotte G.; Mitchell, Emily G. (June 2015). "Remarkable insights into the paleoecology of the Avalonian Ediacaran macrobiota". Gondwana Research. 27 (4): 1355–1380. doi:10.1016/j.gr.2014.11.002.