Drook Formation

Drook Formation
Stratigraphic range: Ediacaran 579.88–574 Ma PreꞒ Ꞓ O S D C P T J K Pg N [1]
Type	Formation
Unit of	Conception Group[2]
Sub-units	Clam Cove, Peter’s River, Biscay, Cape English, Torbay, Bauline Line and Broad Cove River Members[3]
Underlies	Briscal Formation[3] Mistaken Point Formation[3]
Overlies	Gaskiers Formation[2][3]
Thickness	770 m (2,526 ft)
Lithology
Primary	Siliceous Siltstone[3]
Other	Sandstone, Tuff[3]
Location
Region	Newfoundland and Labrador
Country	Canada

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

• Earth sciences portal
• Canada portal
• Paleontology portal

• List of fossiliferous stratigraphic units in Newfoundland and Labrador

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.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]}
3. "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. "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.