Merrimack Formation

{{Infobox rockunit

| name = Merrimack Formation

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| type = Geological formation

| age = Silurian

| period = Silurian

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| region = {{Flag|Quebec}}

| country = {{CAN}}

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| underlies = Gun River Formation{{Cite journal |last1=Copper |first1=Paul |last2=Long |first2=Darrel G. F. |last3=Jin |first3=Jisuo |date=2012 |title=The Early Silurian Gun River Formation of Anticosti Island, eastern Canada: A key section for the mid-Llandovery of North America |url=https://www.academia.edu/20175056 |journal=Newsletters on Stratigraphy |volume=45 |issue=3 |pages=263 |doi=10.1127/0078-0421/2012/0024 |issn=0078-0421}}

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

Fossil content

class="wikitable" align="center"
colspan="6" align="center" \| Brachiopods
Genus	Species	Presence !Material	Notes	Images
style="background:#E6E6E6;"\|Cerasina \|style="background:#E6E6E6;"\|C. pycnata \|style="background:#E6E6E6;"\|Near Merrimack Point, northeastern coast of Anticosti Island.{{Cite journal \|last=Copper \|first=Paul \|date=September 1995 \|title=Five new genera of Late Ordovician-Early Silurian brachiopods from Anticosti Island, eastern Canada \|url=https://ur.booksc.me/book/47912531/7f1efd \|journal=Journal of Paleontology \|volume=69 \|issue=5 \|pages=846–862 \|doi=10.1017/s0022336000035526 \|s2cid=132079646 \|issn=0022-3360\|url-access=subscription }} \|style="background:#E6E6E6;"\|More than 200 specimens. \|style="background:#E6E6E6;"\|Genus renamed to Cerasinella.{{Cite journal \|last=Copper \|first=Paul \|date=September 2015 \|title=Cerasinella, A replacement name for the Silurian brachiopod genus Cerasina Copper 1995, Anticosti Island \|url=https://www.cambridge.org/core/journals/journal-of-paleontology/article/abs/cerasinella-a-replacement-name-for-the-silurian-brachiopod-genus-cerasina-copper-1995-anticosti-island/E22B234D1544D12C36C7E2C3F2CF6CBE \|journal=Journal of Paleontology \|language=en \|volume=89 \|issue=5 \|pages=894 \|doi=10.1017/jpa.2015.55 \|s2cid=130558774 \|issn=0022-3360\|url-access=subscription }} \|style="background:#E6E6E6;"\|
Cerasinella \|C. pycnata \|Near Merrimack Point, northeastern coast of Anticosti Island. \|More than 200 specimens. \| An atrypoid originally named Cerasina. \|
rowspan=2\|Fenestrirostra \|F. glacialis \|Middle and upper beds of the formation.{{Cite journal \|last1=Jin \|first1=Jisuo \|last2=Caldwell \|first2=W. G. E. \|last3=Copper \|first3=Paul \|date=March 1990 \|title=Evolution of the Early Silurian rhynchonellid brachiopod Fenestrirostra in the Anticosti Basin of Quebec \|url=https://www.researchgate.net/publication/266477153 \|journal=Journal of Paleontology \|volume=64 \|issue=2 \|pages=214–222 \|doi=10.1017/s0022336000018370 \|s2cid=132248649 \|issn=0022-3360}} \| \|A rhynchonellid also found in the lowermost Gun River Formation. \|
F. primaeva \|Lower part of the middle Merrimack Formation. \| \|A rhynchonellid. \|
Stricklandia \|S. sp. \| \|"A22=C683 (2 broken shells); A1242 (15, broken); A1329 (1 broken dorsal valve)".{{Cite journal \|last1=Jin \|first1=Jisuo \|last2=Copper \|first2=Paul \|title=Late Ordovician and Early Silurian pentamerid brachiopods of Anticosti Island, Québec, Canada \|url=https://www.academia.edu/20175090 \|journal=Palaeontographica Canadiana}} \|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)". \| \|

class="wikitable" align="center"

colspan="6" align="center" | Brachiopods

Genus

Species

Presence

!Material

Notes

Images

style="background:#E6E6E6;"|Cerasina

|style="background:#E6E6E6;"|C. pycnata

|style="background:#E6E6E6;"|Near Merrimack Point, northeastern coast of Anticosti Island.{{Cite journal |last=Copper |first=Paul |date=September 1995 |title=Five new genera of Late Ordovician-Early Silurian brachiopods from Anticosti Island, eastern Canada |url=https://ur.booksc.me/book/47912531/7f1efd |journal=Journal of Paleontology |volume=69 |issue=5 |pages=846–862 |doi=10.1017/s0022336000035526 |s2cid=132079646 |issn=0022-3360|url-access=subscription }}

|style="background:#E6E6E6;"|More than 200 specimens.

|style="background:#E6E6E6;"|Genus renamed to Cerasinella.{{Cite journal |last=Copper |first=Paul |date=September 2015 |title=Cerasinella, A replacement name for the Silurian brachiopod genus Cerasina Copper 1995, Anticosti Island |url=https://www.cambridge.org/core/journals/journal-of-paleontology/article/abs/cerasinella-a-replacement-name-for-the-silurian-brachiopod-genus-cerasina-copper-1995-anticosti-island/E22B234D1544D12C36C7E2C3F2CF6CBE |journal=Journal of Paleontology |language=en |volume=89 |issue=5 |pages=894 |doi=10.1017/jpa.2015.55 |s2cid=130558774 |issn=0022-3360|url-access=subscription }}

|style="background:#E6E6E6;"|

Cerasinella

|C. pycnata

|Near Merrimack Point, northeastern coast of Anticosti Island.

|More than 200 specimens.

| An atrypoid originally named Cerasina.

rowspan=2|Fenestrirostra

|F. glacialis

|Middle and upper beds of the formation.{{Cite journal |last1=Jin |first1=Jisuo |last2=Caldwell |first2=W. G. E. |last3=Copper |first3=Paul |date=March 1990 |title=Evolution of the Early Silurian rhynchonellid brachiopod Fenestrirostra in the Anticosti Basin of Quebec |url=https://www.researchgate.net/publication/266477153 |journal=Journal of Paleontology |volume=64 |issue=2 |pages=214–222 |doi=10.1017/s0022336000018370 |s2cid=132248649 |issn=0022-3360}}

|A rhynchonellid also found in the lowermost Gun River Formation.

F. primaeva

|Lower part of the middle Merrimack Formation.

|A rhynchonellid.

Stricklandia

|S. sp.

|"A22=C683 (2 broken shells); A1242 (15, broken); A1329 (1 broken dorsal valve)".{{Cite journal |last1=Jin |first1=Jisuo |last2=Copper |first2=Paul |title=Late Ordovician and Early Silurian pentamerid brachiopods of Anticosti Island, Québec, Canada |url=https://www.academia.edu/20175090 |journal=Palaeontographica Canadiana}}

|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)".

References

{{cite web|title= Fossilworks: Gateway to the Paleobiology Database|author= ((Various Contributors to the Paleobiology Database))|url= https://www.fossilworks.org|access-date= 17 December 2021}}

Category:Silurian Quebec

Category:Silurian southern paleotropical deposits

Merrimack Formation

Fossil content

See also

References