Merrimack Formation

Merrimack Formation
Stratigraphic range: Silurian
Type	Geological formation
Underlies	Gun River Formation[1]
Location
Region	Quebec
Country	Canada

The Merrimack Formation is a geologic formation in Quebec. It preserves fossils dating back to the Silurian period.

Fossil content

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.

Brachiopods
Genus	Species	Presence	Material	Notes	Images
Cerasina	C. pycnata	Near Merrimack Point, northeastern coast of Anticosti Island.[2]	More than 200 specimens.[2]	Genus renamed to Cerasinella.[3]
Cerasinella	C. pycnata	Near Merrimack Point, northeastern coast of Anticosti Island.[2]	More than 200 specimens.[2]	An atrypoid originally named Cerasina.[3]
Fenestrirostra	F. glacialis	Middle and upper beds of the formation.[4]		A rhynchonellid also found in the lowermost Gun River Formation.
	F. primaeva	Lower part of the middle Merrimack Formation.[4]		A rhynchonellid.
Stricklandia	S. sp.		"A22=C683 (2 broken shells); A1242 (15, broken); A1329 (1 broken dorsal valve)".[5]	Also found in the Gun River Formation.
Virgiana	V. mayvillensis		"A505 (1 shell); A 739 (5, all broken); A 741 (33, most damaged); A842 (38, most damaged); A 1330 (12 shells)".[5]

See also

• List of fossiliferous stratigraphic units in Quebec

References

1. Copper, Paul; Long, Darrel G. F.; Jin, Jisuo (2012). "The Early Silurian Gun River Formation of Anticosti Island, eastern Canada: A key section for the mid-Llandovery of North America". Newsletters on Stratigraphy. 45 (3): 263. doi:10.1127/0078-0421/2012/0024. ISSN 0078-0421.
2. Copper, Paul (September 1995). "Five new genera of Late Ordovician-Early Silurian brachiopods from Anticosti Island, eastern Canada". Journal of Paleontology. 69 (5): 846–862. doi:10.1017/s0022336000035526. ISSN 0022-3360. S2CID 132079646.
3. Copper, Paul (September 2015). "Cerasinella, A replacement name for the Silurian brachiopod genus Cerasina Copper 1995, Anticosti Island". Journal of Paleontology. 89 (5): 894. doi:10.1017/jpa.2015.55. ISSN 0022-3360. S2CID 130558774.
4. Jin, Jisuo; Caldwell, W. G. E.; Copper, Paul (March 1990). "Evolution of the Early Silurian rhynchonellid brachiopod Fenestrirostra in the Anticosti Basin of Quebec". Journal of Paleontology. 64 (2): 214–222. doi:10.1017/s0022336000018370. ISSN 0022-3360. S2CID 132248649.
5. Jin, Jisuo; Copper, Paul. "Late Ordovician and Early Silurian pentamerid brachiopods of Anticosti Island, Québec, Canada". Palaeontographica Canadiana.

• Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.