Merrimack Formation

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

Merrimack Formation
Stratigraphic range: Silurian
TypeGeological formation
UnderliesGun River Formation[1]
Location
Region Quebec
Country Canada

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
GenusSpeciesPresence MaterialNotesImages
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

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.


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