Drook Formation

Drook Formation
Stratigraphic range: Ediacaran [1]
TypeFormation
Unit ofConception Group[2]
Sub-unitsClam Cove, Peter’s River, Biscay, Cape English, Torbay, Bauline Line and Broad Cove River Members[3]
Underlies
OverliesGaskiers Formation[2][3]
Thickness770 m (2,526 ft)
Lithology
PrimarySiliceous Siltstone[3]
OtherSandstone, Tuff[3]
Location
RegionNewfoundland and Labrador
CountryCanada

The Drook Formation is a geologic formation in Newfoundland and Labrador. It preserves fossils dating back to the Ediacaran period. It contains a stratum dated to 575.8 ± 0.5 million years ago.[2]

Paleobiota

Like the other overlying and underlying formations, the Drook Formation represents a rare deep-marine paleoenviroment, [4] and preserves a few fossils, like the large Trepassia.[5]

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

Genus Species Notes Images
Charnia[5]
  • C. masoni
 Sessile frondose organism.
Charniodiscus (?)[5]
  • Charniodiscus sp.
 Sessile frondose organism.
Trepassia[5]
  • T. wardae
 Sessile frondose organism.
Vinlandia[5]
  • V. antecedens
 Sessile frondose organism.

Ivesheadiomorph

Genus Species Notes Images
Ivesheadia[5][6]
  • Ivesheadia sp.
 Poorly preserved organism.
Blackbrookia[5]
  • Blackbrookia sp.
 Poorly preserved organism.

See also

References

  • Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.
  1. ^ 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.
  2. ^ a b c 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).
  3. ^ a b c d e f "GEOLOGY OF THE AVALON PENINSULA, NEWFOUNDLAND" (PDF).
  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. ^ a b c d e f g "Wayback Machine" (PDF). www.gov.nl.ca.
  6. ^ Liu, Alexander G.; Mcilroy, Duncan; Antcliffe, Jonathan B.; Brasier, Martin D. (May 2011). "Effaced preservation in the Ediacara biota and its implications for the early macrofossil record". Palaeontology. 54 (3): 607–630. doi:10.1111/j.1475-4983.2010.01024.x.


This article is issued from Wikipedia. The text is available under Creative Commons Attribution-Share Alike 4.0 unless otherwise noted. Additional terms may apply for the media files.