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{{Short description|Geological formation in the United States of America}}
{{Infobox Rockunit
{{Infobox Rockunit
| name = Mooreville Chalk
| name = Mooreville Chalk
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The '''Mooreville Chalk''' is a geological [[Formation (geology)|formation]] in [[North America]], within the [[United States|U.S.]] states of [[Alabama]] and [[Mississippi]]. The strata date back to the early [[Santonian]] to the early [[Campanian]] [[Stage (stratigraphy)|stage]] of the [[Late Cretaceous]].<ref name="cretaceousdistribution" /> The [[chalk]] was formed by [[pelagic sediments]] deposited along the eastern edge of the [[Mississippi embayment]]. It is a unit of the [[Selma Group]] and consists of the upper Arcola Limestone Member and an unnamed lower member.<ref name="NEWBIRD">{{cite journal |last=Chiappe |first=Luis |year=2002 |title=New enantiornithine bird from the marine Upper Cretaceous of Alabama|journal=Journal of Vertebrate Paleontology |volume=22 |issue=1 |pages=170–174 |url=http://www.bioone.org/doi/full/10.1671/0272-4634(2002)022%5B0170%3ANEBFTM%5D2.0.CO%3B2 |accessdate=2009-02-07 |doi=10.1671/0272-4634(2002)022[0170:NEBFTM]2.0.CO;2 |last2=Lamb |first2=James P. |last3=Ericson |first3=PER G. P. }}</ref> [[Dinosaur]], [[mosasaur]], and primitive [[bird]] remains are among the fossils that have been recovered from the Mooreville Chalk Formation.<ref name="cretaceousdistribution">Weishampel, David B; et al. (2004). "Dinosaur distribution (Late Cretaceous, North America)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 574-588. {{ISBN|0-520-24209-2}}.</ref><ref name="NEWBIRD"/><ref name="STRAT">{{cite journal |last=Kiernan |first=Caitlin R. |year=2002 |title=Stratigraphic distribution and habitat segregation of mosasaurs in the Upper Cretaceous of western and central Alabama, with an historical review of Alabama mosasaur discoveries |journal=Journal of Vertebrate Paleontology |volume=22 |issue=1 |pages=91–103 |url=http://www.bioone.org/doi/full/10.1671/0272-4634(2002)022%5B0091%3ASDAHSO%5D2.0.CO%3B2 |accessdate=2009-02-02 |doi=10.1671/0272-4634(2002)022[0091:SDAHSO]2.0.CO;2 }}</ref>
The '''Mooreville Chalk''' is a geological [[Formation (geology)|formation]] in [[North America]], within the [[United States|U.S.]] states of [[Alabama]] and [[Mississippi]], which were part of the subcontinent of [[Appalachia (Mesozoic)|Appalachia]]. The strata date back to the early [[Santonian]] to the early [[Campanian]] [[Stage (stratigraphy)|stage]] of the [[Late Cretaceous]].<ref name="cretaceousdistribution" /> The [[chalk]] was formed by [[pelagic sediments]] deposited along the eastern edge of the [[Mississippi embayment]]. It is a unit of the [[Selma Group]] and consists of the upper Arcola Limestone Member and an unnamed lower member.<ref name="NEWBIRD">{{cite journal |last=Chiappe |first=Luis |year=2002 |title=New enantiornithine bird from the marine Upper Cretaceous of Alabama|journal=Journal of Vertebrate Paleontology |volume=22 |issue=1 |pages=170–174 |doi=10.1671/0272-4634(2002)022[0170:NEBFTM]2.0.CO;2 |last2=Lamb |first2=James P. |last3=Ericson |first3=PER G. P. }}</ref> [[Dinosaur]], [[mosasaur]], and primitive [[bird]] remains are among the fossils that have been recovered from the Mooreville Chalk Formation.<ref name="cretaceousdistribution">Weishampel, David B; et al. (2004). "Dinosaur distribution (Late Cretaceous, North America)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 574-588. {{ISBN|0-520-24209-2}}.</ref><ref name="NEWBIRD"/><ref name="STRAT">{{cite journal |last=Kiernan |first=Caitlin R. |year=2002 |url=https://www.researchgate.net/publication/254314199 |title=Stratigraphic distribution and habitat segregation of mosasaurs in the Upper Cretaceous of western and central Alabama, with an historical review of Alabama mosasaur discoveries |journal=Journal of Vertebrate Paleontology |volume=22 |issue=1 |pages=91–103 |doi=10.1671/0272-4634(2002)022[0091:SDAHSO]2.0.CO;2 }}</ref>


==Fish==
==Fish==
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''[[Cretalamna]]''
''[[Cretolamna]]''
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''C. appendiculata''<ref name="STRAT"/>
''C. appendiculata''<ref name="STRAT"/>
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''[[Albula (genus)|Albula]]''
''[[Albula (fish)|Albula]]''
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''A. dunklei''<ref name="SELMA"/>
''A. dunklei''<ref name="SELMA"/>
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A [[Tselfatiiformes|tselfatiiform]]
A [[Tselfatiformes|tselfatiform]]
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An [[Aulopiformes|aulopiform]]
A [[Salmonidae|salmoniform]]
|-
|-
| rowspan="2" |
| rowspan="2" |
''[[Enchodus]]''
''[[Enchodus]]''
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''E. petrosus''<ref name="SELMA"/>
''E. petrosus''<ref name="SELMA"/><ref name="STRAT"/>
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An [[Aulopiformes|aulopiform]]
[[Salmonidae|Salmoniforms]]
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''E. saevus''<ref name="SELMA"/>
''E. saevus''<ref name="SELMA"/>
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A [[Trachichthyiformes|trachichthyiform]]
A [[Beryciformes|beryciform]]
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A [[Tselfatiiformes|tselfatiiform]]
An [[Elopiformes|elopiform]]
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A [[Crossognathiformes|crossognathiform]]
An [[Elopiformes|elopiform]]
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''[[Protosphyraena]]''
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''P. gladius''<ref name="STRAT"/>
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A [[pachycormid]]
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An [[Alepisauriformes|alepisauriform]]
An [[Aulopiformes|aulopiform]]
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===Dinosaurs===
===Dinosaurs===
Indeterminate hadrosaurid, nodosaurid, dinosaur egg, and ornithomimmosaur fossils are known from Mooreville Chalk outcrops in Alabama.<ref name="cretaceousdistribution" />
Indeterminate hadrosaurid, nodosaurid, dinosaur egg, and ornithomimosaur fossils are known from Mooreville Chalk outcrops in Alabama.<ref name="cretaceousdistribution" /> The nodosaurid remains most likely belong to a new taxon.<ref name=":0">{{Cite journal|last=Brownstein|first=Chase D.|date=2018-02-08|title=The biogeography and ecology of the Cretaceous non-avian dinosaurs of Appalachia|url=https://palaeo-electronica.org/content/2018/2123-appalachia-biogeography|journal=Palaeontologia Electronica|language=English|volume=21|issue=1|pages=1–56|doi=10.26879/801|issn=1094-8074|doi-access=free}}</ref>
{{paleobiota-key-compact}}
{{paleobiota-key-compact}}
{| class="wikitable" align="center" width="100%"
{| class="wikitable" align="center" width="100%"
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|style="background:#fbdddb;" |
|style="background:#fbdddb;" |
''A. antecessor'' was originally described as ''Plegadornis antecessor'', but the generic name ''Plegadornis'' was preoccupied, so the genus ''Angelinornis'' was erected to contain the species. It was later demonstrated that ''Angelinornis'' was a junior synonym of ''[[Ichthyornis]]'', although the new combination ''I. antecessor'' was held to be valid for a while following the sinking of ''Angelinornis'' into ''Ichthyornis''. Later the species would later be considered a junior synonym of the Ichthyornis type species, ''I. dispar''.<ref name="cretaceousdistribution" />
''A. antecessor'' was originally described as ''Plegadornis antecessor'', but the generic name ''Plegadornis'' was preoccupied, so the genus ''Angelinornis'' was erected to contain the species. It was later demonstrated that ''Angelinornis'' was a junior synonym of ''[[Ichthyornis]]'', although the new combination ''I. antecessor'' was held to be valid for a while following the sinking of ''Angelinornis'' into ''Ichthyornis''. Later the species would later be considered a junior synonym of the Ichthyornis type species, ''I. dispar''.<ref name="cretaceousdistribution" />
| rowspan="100" |[[File:Eotrachodon NT small.jpg|thumb|center|200px|''Eotrachodon'']]
| rowspan="99" |
[[Image:Ichthyornis BW.jpg|thumb|center|200px|''Ichthyornis dispar'']]
[[Image:Ichthyornis restoration.jpeg|thumb|center|200px|''Ichthyornis dispar'']][[File:Saurornitholestes digging Burrows wahweap.jpg|thumb|''Saurornitholestes'']]


<!-- Deleted image removed: [[File:Lophorhothon atopus.jpg|thumb|center|200px|''[[Lophorhothon atopus]]'']] -->
<!-- Deleted image removed: [[File:Lophorhothon atopus.jpg|thumb|center|200px|''[[Lophorhothon atopus]]'']] -->
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''L. atopus''<ref name="cretaceousdistribution" /><ref name="STRAT"/>
''L. atopus''<ref name="cretaceousdistribution" /><ref name="STRAT"/>
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* [[Alabama]].<ref name="cretaceousdistribution" />
* [[Alabama]].<ref name="cretaceousdistribution" />
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A primitive species [[hadrosaurid]] known from only a few skull fragments.<ref name="cretaceousdistribution" />
A primitive species of [[hadrosaurid]] known from only a few skull fragments.<ref name="cretaceousdistribution" />
|-
|''[[Saurornitholestes]]''<ref name=":0" />
|''S.'' sp.
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|A [[Dromaeosauridae|dromaeosaurid]].
|-
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|style="background:#fbdddb;" |
|style="background:#fbdddb;" |
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[[Mosasaurine]]s
[[Mosasaurine]]s
| rowspan="99" |
| rowspan="100" |
[[Image:Clidastes proph1DB.jpg|thumb|center|200px|''Clidastes prophyton'']]
[[Image:Clidastes proph1DB.jpg|thumb|center|200px|''Clidastes propython'']]
[[Image:Eonatator BW.jpg|thumb|center|200px|''Eonatator sternbergii'']]
[[Image:Eonatator BW.jpg|thumb|center|200px|''Eonatator sternbergii'']]
[[Image:GlobidensDB2.jpg|thumb|center|200px|''Globidens alabamaensis'']]
[[Image:GlobidensDB2.jpg|thumb|center|200px|''Globidens alabamaensis'']]
<!-- [[Image:Tylosaurus proriger12DB.jpg|thumb|center|200px|''Tylosaurus proriger'']] -->
[[File:Platecarpus tympaniticus.jpg|thumb|center|200px|''Platecarpus tympaniticus'']]
[[File:Selmasaurus life.png|thumb|center|200px|''Selmasaurus russelli'']]
[[Image:Bunker tylosaur22.jpg|thumb|center|200px|''Tylosaurus proriger'']]
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''C. propython''<ref name="SELMA"/>
''C. propython''<ref name="SELMA"/><ref name="STRAT"/>
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|''[[Ectenosaurus]]''
|''E. shannoni''<ref>{{Cite journal |last=Kiernan |first=Caitlin R. |last2=Ebersole |first2=Jun A. |date=2023 |title=Two new plioplatecarpine mosasaurs (Mosasauridae; Plioplatecarpinae) of the genus Ectenosaurus from the Upper Cretaceous of North America |url=https://escholarship.org/uc/item/6jk04749 |journal=PaleoBios |language=en |volume=40 |issue=13 |doi=10.5070/P9401362375 |issn=0031-0298|doi-access=free }}</ref>
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|A [[plioplatecarpine]]
|-
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| rowspan="2" |
| rowspan="2" |
''[[Eonatator]]''
''[[Eonatator]]''
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''E. sternbergi'' ([[sic]])<ref name="STRAT"/><ref>{{cite journal|author1=Kejiri, T.|author2=Ebersole, J.A.|author3=Blewitt, H.L.|author4=Ebersole, S.M.|year=2013|url=https://www.researchgate.net/publication/272508435|title=An Overview of Late Cretaceous Vertebrates from Alabama|journal=Bulletin of the Alabama Museum of Natural History|volume=31|issue=1|pages=46–71}}</ref>
''E. sternbergii''<ref name="STRAT"/><ref name="BARDET">{{cite journal |year=2002 |title=A new species of ''Halisaurus'' from the Late Cretaceous phosphates of Morocco, and the phylogenetical relationships of the Halisaurinae (Squamata: Mosasauridae) |journal=Zoological Journal of the Linnean Society|volume=143 |pages=447–472 |url=http://www.ingentaconnect.com/content/bsc/zoj/2005/00000143/00000003/art00005 |accessdate=2009-02-10 |vauthors=Bardet N, Suberbiola P, Iarochene M, Bouyahyaoui F, Bouya B, Amaghzaz M |doi=10.1111/j.1096-3642.2005.00152.x |issue=3 }}</ref>
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A [[halisaurine]]
A [[halisaurine]]
''E. sternbergii'' was formerly classified as ''[[Halisaurus|Halisaurus sternbergii]]''<ref name="BARDET">{{cite journal |year=2005 |title=A new species of ''Halisaurus'' from the Late Cretaceous phosphates of Morocco, and the phylogenetical relationships of the Halisaurinae (Squamata: Mosasauridae) |journal=Zoological Journal of the Linnean Society|volume=143 |pages=447–472 |vauthors=Bardet N, Suberbiola P, Iarochene M, Bouyahyaoui F, Bouya B, Amaghzaz M |doi=10.1111/j.1096-3642.2005.00152.x |issue=3 |doi-access=free }}</ref>
''E. sternbergii'' was formerly classified as ''[[Halisaurus|Halisaurus sternbergii]]''
|-
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''E. zangerli ''<ref>https://www.academia.edu/3725966/The_relationships_of_Alabama_halisaurine_mosasaurs</ref>
''E. zangerli''<ref>{{Cite web|url=https://www.academia.edu/3725966/The_relationships_of_Alabama_halisaurine_mosasaurs|title=The relationships of Alabama halisaurine mosasaurs|website=Academia.edu|access-date=10 December 2021}}</ref>
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A [[plioplatecarpine]]
A [[plioplatecarpine]]
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| rowspan="2" |
''[[Prognathodon]]''
''[[Prognathodon]]''
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[[Mosasaurine]]s
A [[mosasaurine]]
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''P. solvayi''<ref name="STRAT"/>
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===Plesiosaurs===
===Plesiosaurs===
Very rare [[elasmosaur]]s are present in this formation.<ref name="STRAT"/>
{| class="wikitable" align="center" width="100%"
{| class="wikitable" align="center" width="100%"
|-
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[[Pteranodontidae|Pteranodontid]]s.
[[Pteranodontidae|Pteranodontid]]s.
| rowspan="99" |
| rowspan="99" |
[[Image:Pteranodon hharder.jpg|thumb|center|200px|''Pteranodon'' sp.]]
[[Image:Pteranodon longiceps mmartyniuk wiki.png|thumb|center|200px|''Pteranodon'' sp.]]
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|}
|}
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A [[Pelomedusidae|pelomedusid]].
A [[Pelomedusidae|pelomedusid]].
| rowspan="99" |
| rowspan="99" |
[[Image:Protostega gig1DB.jpg|thumb|center|200px|''Protostega gigas'']]
[[Image:Protostega gigas.jpg|thumb|center|200px|''Protostega gigas'']]
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== See also ==
== See also ==
{{Portal|Cretaceous|Dinosaurs|Earth sciences|Paleontology}}
{{Portal|Dinosaurs|Paleontology}}
* [[List of dinosaur-bearing rock formations]]
* [[List of dinosaur-bearing rock formations]]
* [[List of fossil sites]]
* [[List of fossil sites]]

Latest revision as of 04:23, 1 September 2024

Mooreville Chalk
Stratigraphic range: Upper Cretaceous
TypeGeological formation
Unit ofSelma Group
Sub-unitsArcola Limestone Member
UnderliesDemopolis Chalk Formation
OverliesEutaw Formation
Lithology
PrimaryChalk
Location
RegionAlabama, Mississippi
CountryUnited States

The Mooreville Chalk is a geological formation in North America, within the U.S. states of Alabama and Mississippi, which were part of the subcontinent of Appalachia. The strata date back to the early Santonian to the early Campanian stage of the Late Cretaceous.[1] The chalk was formed by pelagic sediments deposited along the eastern edge of the Mississippi embayment. It is a unit of the Selma Group and consists of the upper Arcola Limestone Member and an unnamed lower member.[2] Dinosaur, mosasaur, and primitive bird remains are among the fossils that have been recovered from the Mooreville Chalk Formation.[1][2][3]

Fish

[edit]

Cartilaginous fish

[edit]
Cartilaginous fish of the Mooreville Chalk Formation
Genus Species Location Stratigraphic position Abundance Notes Images

Cretolamna

C. appendiculata[3]

A lamniform

Cretoxyrhina mantelli
Squalicorax sp.

Cretoxyrhina

C. mantelli[3]

A lamniform

Edaphodon

E. barberi[4]

Chimaeriforms

E. mirificus[4]

Ischyodus

I. williamsae[4]

A chimaeriform

Odontaspis

O. cuspidata

A lamniform

Propenser

P. hewletti[4]

Lamniformes

Ptychodus

P. mammillaris[4]

?Neoselachian incertae sedis

P. mortoni[3]

P. polygyrus[4]

Pseudocorax

P. affinis[4]

Lamniformes

P. laevis[3]

Serratolamna

S. serrata[3]

A lamniform

Scapanorhynchus

S. rhaphiodon[4]

Lamniformes

S. texanus[3]

Squalicorax

S. falcatus[4]

Lamniformes

S. kaupi[3]

Bony fish

[edit]
Bony fish of the Mooreville Chalk Formation
Genus Species Location Stratigraphic position Abundance Notes Images

Albula

A. dunklei[4]

An albuliform

Enchodus petrosus
Saurodon leanus
Xiphactinus audax

Bananogmius

B. crieleyi[4]

A tselfatiiform

Cimolichthys

C. nepaholica[4]

An aulopiform

Enchodus

E. petrosus[4][3]

An aulopiform

E. saevus[4]

Hoplopteryx

Hoplopteryx sp.[4]

A trachichthyiform

Ichthyodectes

I. ctenodon[4]

An ichthyodectiform

Moorevillia

M. hardi[4]

A tselfatiiform

Pachyrhizodus

P. caninus[4]

A crossognathiform

Protosphyraena

P. gladius[3]

A pachycormid

Saurodon

S. leanus[4]

An ichthyodectiform

Stratodus

S. apicalis[4]

An aulopiform

Xiphactinus

X. audax[4]

An ichthyodectiform

Reptiles

[edit]

Dinosaurs

[edit]

Indeterminate hadrosaurid, nodosaurid, dinosaur egg, and ornithomimosaur fossils are known from Mooreville Chalk outcrops in Alabama.[1] The nodosaurid remains most likely belong to a new taxon.[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.
Dinosaurs reported from the Mooreville Chalk Formation
Genus Species Location Stratigraphic position Material Notes Images

Angelinornis

A. antecessor

A. antecessor was originally described as Plegadornis antecessor, but the generic name Plegadornis was preoccupied, so the genus Angelinornis was erected to contain the species. It was later demonstrated that Angelinornis was a junior synonym of Ichthyornis, although the new combination I. antecessor was held to be valid for a while following the sinking of Angelinornis into Ichthyornis. Later the species would later be considered a junior synonym of the Ichthyornis type species, I. dispar.[1]

Eotrachodon
Ichthyornis dispar
Saurornitholestes

Eotrachodon[6]

E. orientalis

A hadrosaurid known from a nearly complete skeleton and nearly complete skull.

Halimornis[1][2]

H. thompsoni[1][2]

"Vertebrae and limb elements."[7]

An enantiornithine

Ichthyornis[1][2]

I. antecessor

The species I. antecessor was made the type species of the genus Angelinornis in 1962. Later, I. antecessor and Angelinornis were shown to be junior synonyms of the Ichthyornis type species, I. dispar[1]

I. dispar[1][2]

An ichthyornithine.

Lophorhothon[1][3]

L. atopus[1][3]

A primitive species of hadrosaurid known from only a few skull fragments.[1]

Saurornitholestes[5] S. sp. A dromaeosaurid.

Plegadornis

P. antecessor

The name Plegadornis antecessor was applied to a fossil believed to represent a new bird species, but the generic name Plegadornis was preoccupied, so the genus Angelinornis was erected to contain the "new" species. It was later demonstrated that Angelinornis was a junior synonym of Ichthyornis, although the new combination I. antecessor was held to be valid for a while following the sinking of Angelinornis into Ichthtyornis. Later the species would later be considered a junior synonym of the Ichthyornis type species, I. dispar.[1]

Mosasaurs

[edit]
Mosasaurs of the Mooreville Chalk Formation
Genus Species Location Stratigraphic position Abundance Notes Images

Clidastes

C. liodontus[4]

Mosasaurines

Clidastes propython
Eonatator sternbergii
Globidens alabamaensis
Platecarpus tympaniticus
Selmasaurus russelli
Tylosaurus proriger

C. "moorevillensis"[3]

C. propython[4][3]

Ectenosaurus E. shannoni[8] A plioplatecarpine

Eonatator

E. sternbergi (sic)[3][9]

A halisaurine E. sternbergii was formerly classified as Halisaurus sternbergii[10]

E. zangerli[11]

Globidens

G. alabamaensis[3]

A mosasaurine

Mosasaurus

M. missouriensis[3]

A mosasaurine

Platecarpus

P. tympaniticus[3]

A plioplatecarpine

Prognathodon

P. rapax[4]

A mosasaurine

Selmasaurus

S. russelli[3]

A plioplatecarpine

Tylosaurus

T. proriger[4]

A tylosaurine

Plesiosaurs

[edit]

Very rare elasmosaurs are present in this formation.[3]

Plesiosaurs of the Mooreville Chalk Formation
Genus Species Location Stratigraphic position Abundance Notes Images

Trinacromerum

Trinacromerum sp.[3]

Polycotylids

Trinacromerum sp.

Pterosaurs

[edit]
Pterosaurs of the Mooreville Chalk Formation
Genus Species Location Stratigraphic position Abundance Notes Images

Pteranodon

Pteranodon sp.[3]

Pteranodontids.

Pteranodon sp.

Turtles

[edit]
Turtles of the Mooreville Chalk Formation
Genus Species Location Stratigraphic position Abundance Notes Images

Bothremys

B. barberi[3]

A pelomedusid.

Protostega gigas

Corsochelys

C. haliniches

A dermochelyid.

Protostega

P. gigas[3]

A protostegid.

Toxochelys

T. moorevillensis[3]

A toxochelyid.

See also

[edit]

References

[edit]
  1. ^ a b c d e f g h i j k l m n o p Weishampel, David B; et al. (2004). "Dinosaur distribution (Late Cretaceous, North America)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 574-588. ISBN 0-520-24209-2.
  2. ^ a b c d e f Chiappe, Luis; Lamb, James P.; Ericson, PER G. P. (2002). "New enantiornithine bird from the marine Upper Cretaceous of Alabama". Journal of Vertebrate Paleontology. 22 (1): 170–174. doi:10.1671/0272-4634(2002)022[0170:NEBFTM]2.0.CO;2.
  3. ^ a b c d e f g h i j k l m n o p q r s t u v w x y Kiernan, Caitlin R. (2002). "Stratigraphic distribution and habitat segregation of mosasaurs in the Upper Cretaceous of western and central Alabama, with an historical review of Alabama mosasaur discoveries". Journal of Vertebrate Paleontology. 22 (1): 91–103. doi:10.1671/0272-4634(2002)022[0091:SDAHSO]2.0.CO;2.
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