Drook Formation

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]

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

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