Briscal Formation

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Briscal Formation
Stratigraphic range: Ediacaran 574–570  Ma (approx)
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Type Formation
Unit of Conception Group
Underlies
Overlies Gaskiers Formation [1]
Thickness310 m - 1200 m(1,017 ft - 3,937 ft) [2] [3]
Lithology
Primary Sandstone [1]
Other Argillite, Siltstone, Shale [1]
Location
Region Newfoundland and Labrador
Country Canada
Briscal Formation map.svg
Outcrop occurrence

The Briscal Formation is a geologic formation in Newfoundland and Labrador. It preserves fossils dating back to the Ediacaran period.

Contents

Paleobiota

Like the other overlying and underlying formations, the Briscal Formation represents a rare deep-marine paleoenviroment, [4] and preserves a few fossils, like the large Frondophyllas, only known from incomplete material, some of which sits at over a meter in length. [5]

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

Petalonamae

GenusSpeciesNotesImages
Charniodiscus [3]
  • Charniodiscus sp.
Sessile frondose organism.
Charniodiscus.png
Culmofrons [6]
  • C. plumosa
Sessile frondose organism, junior synonym of Beothukis. [7]
Beothukis [7]
  • B. plumosa
Sessile frondose organism.
Fractofusus [3]
  • Fractofusus sp.
Sessile spindle-like frondose organism.
Fractofusus misrai.jpg
Frondophyllas [5]
  • F. grandis
Sessile tree-like frondose organism.
Primocandelabrum [3]
  • Primocandelabrum sp.
Sessile frondose organism.
Trepassia [3]
  • Trepassia sp.
Sessile frondose organism.
Trepassia wardae fossil.png

See also

References

  1. 1 2 3 4 5 "GEOLOGY OF THE AVALON PENINSULA, NEWFOUNDLAND" (PDF).
  2. ↑ Fitzgerald, Danielle M.; Narbonne, Guy M.; Pufahl, Peir K.; Dalrymple, Robert W. (June 2024). "The Mall Bay Formation (Ediacaran) and the protracted onset of the Gaskiers glaciation in Newfoundland, Canada". Precambrian Research. 405 107369. doi: 10.1016/j.precamres.2024.107369 .
  3. 1 2 3 4 5 "Wayback Machine" (PDF). www.gov.nl.ca.
  4. ↑ 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.
  5. 1 2 Bamforth, Emily L.; Narbonne, Guy M. (November 2009). "New ediacaran rangeomorphs from Mistaken Point, Newfoundland, Canada". Journal of Paleontology. 83 (6): 897–913. doi:10.1666/09-047.1.
  6. ↑ Laflamme, Marc; Flude, Lija I.; Narbonne, Guy M. (March 2012). "Ecological tiering and the evolution of a stem: the oldest stemmed frond from the Ediacaran of Newfoundland, Canada". Journal of Paleontology. 86 (2): 193–200. doi:10.1666/11-044.1.
  7. 1 2 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. hdl: 1983/605900ac-5976-4d0a-a4a7-dfc6aefd1566 .


Charnia masoni - MUSE.jpg

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