Almond Formation

{{Infobox rockunit

| name = Almond Formation

| image =

| caption =

| type = Geological formation

| age = Campanian–Maastrichtian
{{Fossil range|73.6|71.1}}

| period = Maastrichtian

| prilithology = Sandstone

| otherlithology = Siltstone, shale, coalb

| namedfor =

| namedby =

| region = Wyoming

| country = United States

| coordinates = {{WikidataCoord|display=inline,title}}

| unitof =

| subunits =

| underlies = Lewis Shale

| overlies = Ericson Formation

| thickness =

| extent =

| area =

| map = Southwestern Wyoming Upper Cretaceous Unit cross section.jpg

| map_caption = Southwestern Wyoming, incl. Almond formation

}}

The Almond Formation is a geological formation of Late Cretaceous (Late Campanian-Early Maastrichtian{{Cite journal|last=Fowler|first=Denver Warwick|date=2017-11-22|title=Revised geochronology, correlation, and dinosaur stratigraphic ranges of the Santonian-Maastrichtian (Late Cretaceous) formations of the Western Interior of North America|journal=PLOS ONE|volume=12|issue=11|pages=e0188426|doi=10.1371/journal.pone.0188426|issn=1932-6203|pmc=5699823|pmid=29166406|bibcode=2017PLoSO..1288426F|doi-access=free}}) age in Wyoming. It was deposited in marsh, deltaic, lagoonal, estuarine, and shallow marine environments along the western shore of the Western Interior Seaway. It consists primarily of fine- to medium-grained sandstone, siltstone, shale, and coal.Kieft, R.L., Hampton, G.J., Jackson, C.A.-L., and Larsen, E., 2011. Stratigraphic architecture of a net-transgressive marginal- to shallow-marine succession: Upper Almond Formation, Rock Springs Uplift, Wyoming, U.S.A. Journal of Sedimentary Research, vol. 81, p. 513-533. Fossils from the Almond Formation include remains of dinosaursWeishampel, 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}}. and plants.Stockey, R.A., Rothwell, G.W., and Johnson, K.R., 2007. Cobbania corrugata gen. et. comb. nov. (Araceae): A floating aquatic monocot from the Upper Cretaceous of western North America. American Journal of Botany, vol. 94, no. 4, p. 609-624.

Vertebrate paleofauna

=Dinosaurs=

class="wikitable" align="center" width="100%"
colspan="7" align="center" \|Dinosaurs of the Almond Formation
Genus ! Species ! Location ! Stratigraphic position ! Material ! Notes ! Images
style="background:#f3e9f3;" \| Anchiceratops \|style="background:#f3e9f3;" \| Indeterminate \|style="background:#f3e9f3;" \| \|style="background:#f3e9f3;" \| \|style="background:#f3e9f3;" \| \|style="background:#f3e9f3;" \| Represents a new genus and species of unnamed ceratopsid \| rowspan="100" \| File:Dromaeosaurus Restoration.png]] File:Edmontonia dinosaur.png]] File:Anatotitan BW.jpg]] File:Thescelosaurus filamented.jpg]] File:Almond Formation Ceratopsian.png
Dromaeosaurus"3.12 Wyoming, United States; 4. Almond Formation," in Weishampel, et al. (2004). Page 584. \| Indeterminate \| \| \| \|
Edmontonia \| Indeterminate \| \| \| \|
Edmontosaurus \| Indeterminate \| \| \| \|
Maiasaura \| Indeterminate \| \| \| \|
style="background:#E6E6E6;" \| Paronychodon \|style="background:#E6E6E6;" \| P. lacustris \|style="background:#E6E6E6;" \| \|style="background:#E6E6E6;" \| \|style="background:#E6E6E6;" \| \|style="background:#E6E6E6;" \|
Saurolophus{{Cite journal \|last=Gates \|first=T. A. \|last2=Farke \|first2=A. A. \|date=2009-10-01 \|title=Biostratigraphic and biogeographic implications of a hadrosaurid (Ornithopoda: Dinosauria) from the Upper Cretaceous Almond Formation of Wyoming, USA \|url=https://linkinghub.elsevier.com/retrieve/pii/S0195667109000536 \|journal=Cretaceous Research \|volume=30 \|issue=5 \|pages=1157–1163 \|doi=10.1016/j.cretres.2009.05.001 \|issn=0195-6671}} \|S. sp. \| \| \|One specimen (AMNH 3651) consisting of partial cranial and postcranial remains, as well as skin impressions \|
ThescelosaurusListed as "cf. Thescelosaurus sp." in "3.12 Wyoming, United States; 4. Almond Formation," in Weishampel, et al. (2004). Page 584. \| Indeterminate \| \| \| \|
Unnamed chasmosaurine ceratopsidListed as "?Anchiceratops sp." in "3.12 Wyoming, United States; 4. Almond Formation," in Weishampel, et al. (2004). Page 584. \| Unnamed \| \| \| \| Misidentified as Anchiceratops, it is actually a new species of Pentaceratops-like form that is the sister taxon to Bisticeratops.{{cite journal\|vauthors=Dalman SG, Jasinski SE, Lucas SG\|title=A new chasmosaurine ceratopsid from the Upper Cretaceous (Campanian) Farmington Member of the Kirtland Formation, New Mexico\|year=2022\|journal=New Mexico Museum of Natural History and Science Bulletin\|volume=90\|pages=127-153\|url=https://www.researchgate.net/publication/362680358_A_NEW_CHASMOSAURINE_CERATOPSID_FROM_THE_UPPER_CRETACEOUS_CAMPANIAN_FARMINGTON_MEMBER_OF_THE_KIRTLAND_FORMATION_NEW_MEXICO}} Holotype was discovered in 1937.

class="wikitable" align="center" width="100%"

colspan="7" align="center" |Dinosaurs of the Almond Formation

Genus

! Species

! Location

! Stratigraphic position

! Material

! Notes

! Images

style="background:#f3e9f3;" |

Anchiceratops

|style="background:#f3e9f3;" |

Indeterminate

|style="background:#f3e9f3;" |

Represents a new genus and species of unnamed ceratopsid

| rowspan="100" |

File:Dromaeosaurus Restoration.png]]

File:Edmontonia dinosaur.png]]

File:Anatotitan BW.jpg]]

File:Thescelosaurus filamented.jpg]]

File:Almond Formation Ceratopsian.png

Dromaeosaurus"3.12 Wyoming, United States; 4. Almond Formation," in Weishampel, et al. (2004). Page 584.

Indeterminate

Edmontonia

Indeterminate

Edmontosaurus

Indeterminate

Maiasaura

Indeterminate

style="background:#E6E6E6;" |

Paronychodon

|style="background:#E6E6E6;" |

P. lacustris

|style="background:#E6E6E6;" |

Saurolophus{{Cite journal |last=Gates |first=T. A. |last2=Farke |first2=A. A. |date=2009-10-01 |title=Biostratigraphic and biogeographic implications of a hadrosaurid (Ornithopoda: Dinosauria) from the Upper Cretaceous Almond Formation of Wyoming, USA |url=https://linkinghub.elsevier.com/retrieve/pii/S0195667109000536 |journal=Cretaceous Research |volume=30 |issue=5 |pages=1157–1163 |doi=10.1016/j.cretres.2009.05.001 |issn=0195-6671}}

|S. sp.

|One specimen (AMNH 3651) consisting of partial cranial and postcranial remains, as well as skin impressions

ThescelosaurusListed as "cf. Thescelosaurus sp." in "3.12 Wyoming, United States; 4. Almond Formation," in Weishampel, et al. (2004). Page 584.

Indeterminate

Unnamed chasmosaurine ceratopsidListed as "?Anchiceratops sp." in "3.12 Wyoming, United States; 4. Almond Formation," in Weishampel, et al. (2004). Page 584.

Unnamed

Misidentified as Anchiceratops, it is actually a new species of Pentaceratops-like form that is the sister taxon to Bisticeratops.{{cite journal|vauthors=Dalman SG, Jasinski SE, Lucas SG|title=A new chasmosaurine ceratopsid from the Upper Cretaceous (Campanian) Farmington Member of the Kirtland Formation, New Mexico|year=2022|journal=New Mexico Museum of Natural History and Science Bulletin|volume=90|pages=127-153|url=https://www.researchgate.net/publication/362680358_A_NEW_CHASMOSAURINE_CERATOPSID_FROM_THE_UPPER_CRETACEOUS_CAMPANIAN_FARMINGTON_MEMBER_OF_THE_KIRTLAND_FORMATION_NEW_MEXICO}} Holotype was discovered in 1937.

= Other vertebrates =

Non-dinosaur vertebrates found in the Almond Formation include crocodyliforms (indet.), turtles (Adocus cf. and Basilemys cf.), and ray-finned fish (Ichthyodectidae indet.).{{Cite journal |last=Cowgill |first=Ethan |last2=Ashurst-mcgee |first2=Logan |last3=Storrs |first3=Glenn |last4=Johnson |first4=Christopher L. |last5=Affolter |first5=Matthew D. |last6=Law |first6=Lane |last7=Hawkins |first7=Quinlan |last8=Tamez-Galvan |first8=Evan |last9=Kosowatz |first9=Luke |date=2021 |title=A PRELIMINARY REPORT ON NEW VERTEBRATE FOSSILS FROM THE LATE CRETACEOUS ALMOND FORMATION, WYOMING |url=https://gsa.confex.com/gsa/2021AM/webprogram/Paper371282.html |journal=Geological Society of America Abstracts with Programs |volume=53 |issue=6 |doi=10.1130/abs/2021AM-371282}}

Footnotes

References

Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. 861 pp. {{ISBN|0-520-24209-2}}.

Category:Cretaceous geology of Wyoming

Category:Maastrichtian Stage of North America

Almond Formation

Vertebrate paleofauna

=Dinosaurs=

= Other vertebrates =

See also

Footnotes

References