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{{Short description|Geological formation in Malawi}}
{{Location map+ | Vatican City#Monaco#Nauru#Tuvalu#San Marino#Liechtenstein#Marshall Islands#Saint Kitts and Nevis#Maldives#Malta
{{Infobox rockunit
| name = Dinosaur Beds
| image =
| caption =
| type = [[Geological formation]]
| age = {{fossilrange|Barremian|Aptian}}
| period = Aptian
| prilithology = [[Sandstone]], [[siltstone]], [[mudstone]]
| otherlithology =
| namedfor =
| namedby =
| region = [[Northern Region, Malawi|Northern Region]]
| country = {{flag|Malawi}}
| unitof = [[Lupata Group]]
| subunits = Lower Member, Upper Member
| coordinates = {{Coord|10.28|S|34.04|E|display=inline}}
| underlies = Unconformity with [[Pliocene]] [[Chiwondo Beds]]
| overlies = [[Precambrian]] [[metamorphic]] [[Basement (geology)|basement]]
| thickness = Upper member is {{convert|210|m|ft|abbr=on}} thick in vicinity of CD-9 locality
| extent = [[Karonga District]]
| area =
| map = {{Location map+ | Malawi
| relief = 1
| relief = 1
| width = 250
| width = 250
Line 11: Line 33:
}}
}}
}}
}}
| map_caption =
}}
The '''Dinosaur Beds''' is a geological [[Formation (geology)|formation]] in Malawi whose strata date back to the [[Early Cretaceous]]. The age of the deposit is poorly constrained, but is likely to date from the [[Barremian]] to [[Aptian]].<ref>{{Cite journal|last1=Widlansky|first1=Sarah J.|last2=Clyde|first2=William C.|last3=O'Connor|first3=Patrick M.|last4=Roberts|first4=Eric M.|last5=Stevens|first5=Nancy J.|date=March 2018|title=Paleomagnetism of the Cretaceous Galula Formation and implications for vertebrate evolution|journal=Journal of African Earth Sciences|volume=139|pages=403–420|doi=10.1016/j.jafrearsci.2017.11.029|issn=1464-343X|doi-access=free|bibcode=2018JAfES.139..403W }}</ref> Dinosaurs, turtles and crocodylomorphs remains are among the fossils that have been recovered from the formation.<ref name="cretaceousdistribution">Weishampel, David B; et al. (2004). "Dinosaur distribution (Early Cretaceous, Africa)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 571-573. {{ISBN|0-520-24209-2}}.</ref> It is correlated with the [[Galula Formation]] in [[Tanzania]]. It consists of two members, a lower unfossiliferous member consisting of deep red stained sandstones, and an upper fossiliferous member consisting of white sands and grey to red mudstones and siltstones. The upper member is 210 m thick in the vicinity of the CD-9 locality.<ref>{{Cite journal|last1=WINKLER|first1=DALE A.|last2=GOMANI|first2=ELIZABETH M.|last3=JACOBS|first3=LOUIS L.|date=2000|title=COMPARATIVE TAPHONOMY OF AN EARLY CRETACEOUS SAUROPOD QUARRY, MALAWI, AFRICA|url=https://www.researchgate.net/publication/274082885|journal=Paleont. Soc. Korea Special Publication|volume=4|pages=99–114}}</ref>

== Fossil content ==

{{paleobiota-key-compact}}

=== Dinosaurs ===

==== Sauropoda ====
{| class="wikitable" align="center"
|-
! colspan="7" align="center" | [[Plesiosauria|Plesiosaurs]] of the Dinosaur Beds
|-
! Genus
! Species
! Location
! Stratigraphic position
! Material
! Notes
! Images
|-
| ''[[Karongasaurus]]''<ref>Gomani, E.M. 2005. Sauropod dinosaurs from the Early Cretaceous of Malawi, Africa: Palaeontologia Electronica 8 (issue 1 - n. 27a): 37 pages.</ref>
| ''K. gittelmani''
|
|
|
| A [[Titanosauria|titanosaurian]] [[Sauropoda|sauropod]].
|
|-
| ''[[Malawisaurus]]''<ref>{{cite journal | author = Jacobs L. D. Winkler, Gomani E. | year = 1993 | title = New material of an Early Cretaceous titanosaurid dinosaur from Malawi | journal = Palaeontology | volume = 36 | issue = 3| pages = 523–534 }}</ref>
| ''M. dixeyi''
|
|
|
| A [[Lithostrotia|lithostrotian]] [[Titanosauria|titanosaur]].
|
|-
|}

==== Theropoda ====
{| class="wikitable" align="center"
|-
! colspan="7" align="center" | [[theropods]] of the Dinosaur Beds
|-
! Genus
! Species
! Location
! Stratigraphic position
! Material
! Notes
! Images
|-
| [[Theropoda]] Indet.
| Indeterminate
|
|
|
|
|
|-
|}

=== Crocodyliformes ===
{| class="wikitable" align="center"
|-
! colspan="7" align="center" | [[Crocodyliformes]] of the Dinosaur Beds
|-
! Genus
! Species
! Location
! Stratigraphic position
! Material
! Notes
! Images
|-
| ''[[Malawisuchus]]''
| ''M. mwakasyungutiensis''
|
|
|
|
| A [[Candidodontidae|candidodontid]] [[Notosuchia|notosuchian]].
|-
|}

=== Turtles ===
{| class="wikitable" align="center"
|-
! colspan="7" align="center" | [[Turtle|Turtles]] of the Dinosaur Beds
|-
! Genus
! Species
! Location
! Stratigraphic position
! Material
! Notes
! Images
|-
| ''[[Platycheloides]]''
| ''P. nyasae''
|
|
|
| A [[Pelomedusidae|pelomedusid]] [[turtle]].
|
|-
|}


== Invertebrate fauna ==
=== Amphibians ===
{| class="wikitable" align="center"
|-
! colspan="7" align="center" | [[Amphibia|Amphibians]] of the Dinosaur Beds
|-
! Genus
! Species
! Location
! Stratigraphic position
! Material
! Notes
! Images
|-
| [[Anura]] Indet.
| Indetrminate
|
|
|
|
|
|-
|}


=== Crutaceans ===
* ''[[Hourcqia]]'' a non marine [[ostracod]]
{| class="wikitable" align="center"
|-
! colspan="7" align="center" | [[Crustacean|Crustaceans]] of the Dinosaur Beds
|-
! Genus
! Species
! Location
! Stratigraphic position
! Material
! Notes
! Images
|-
| ''[[Hourcqia]]''
| ''H. sp.''
|
|
|
|
| A non-marine [[Ostracod]].
|-
|}


== See also ==
== See also ==
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{{Reflist}}
{{Reflist}}


[[Category:Geologic formations of Malawi]]
[[Category:Cretaceous paleontological sites of Africa]]
[[Category:Cretaceous paleontological sites of Africa]]
[[Category:Lower Cretaceous Series of Africa]]
[[Category:Lower Cretaceous Series of Africa]]

Revision as of 17:22, 29 November 2024

Dinosaur Beds
Stratigraphic range: Barremian–Aptian
TypeGeological formation
Unit ofLupata Group
Sub-unitsLower Member, Upper Member
UnderliesUnconformity with Pliocene Chiwondo Beds
OverliesPrecambrian metamorphic basement
ThicknessUpper member is 210 m (690 ft) thick in vicinity of CD-9 locality
Lithology
PrimarySandstone, siltstone, mudstone
Location
Coordinates10°17′S 34°02′E / 10.28°S 34.04°E / -10.28; 34.04
RegionNorthern Region
Country Malawi
ExtentKaronga District
Dinosaur Beds is located in Malawi
Dinosaur Beds
Dinosaur Beds (Malawi)

The Dinosaur Beds is a geological formation in Malawi whose strata date back to the Early Cretaceous. The age of the deposit is poorly constrained, but is likely to date from the Barremian to Aptian.[1] Dinosaurs, turtles and crocodylomorphs remains are among the fossils that have been recovered from the formation.[2] It is correlated with the Galula Formation in Tanzania. It consists of two members, a lower unfossiliferous member consisting of deep red stained sandstones, and an upper fossiliferous member consisting of white sands and grey to red mudstones and siltstones. The upper member is 210 m thick in the vicinity of the CD-9 locality.[3]

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.

Dinosaurs

Sauropoda

Plesiosaurs of the Dinosaur Beds
Genus Species Location Stratigraphic position Material Notes Images
Karongasaurus[4] K. gittelmani A titanosaurian sauropod.
Malawisaurus[5] M. dixeyi A lithostrotian titanosaur.

Theropoda

theropods of the Dinosaur Beds
Genus Species Location Stratigraphic position Material Notes Images
Theropoda Indet. Indeterminate

Crocodyliformes

Crocodyliformes of the Dinosaur Beds
Genus Species Location Stratigraphic position Material Notes Images
Malawisuchus M. mwakasyungutiensis A candidodontid notosuchian.

Turtles

Turtles of the Dinosaur Beds
Genus Species Location Stratigraphic position Material Notes Images
Platycheloides P. nyasae A pelomedusid turtle.

Amphibians

Amphibians of the Dinosaur Beds
Genus Species Location Stratigraphic position Material Notes Images
Anura Indet. Indetrminate

Crutaceans

Crustaceans of the Dinosaur Beds
Genus Species Location Stratigraphic position Material Notes Images
Hourcqia H. sp. A non-marine Ostracod.

See also

References

  1. ^ Widlansky, Sarah J.; Clyde, William C.; O'Connor, Patrick M.; Roberts, Eric M.; Stevens, Nancy J. (March 2018). "Paleomagnetism of the Cretaceous Galula Formation and implications for vertebrate evolution". Journal of African Earth Sciences. 139: 403–420. Bibcode:2018JAfES.139..403W. doi:10.1016/j.jafrearsci.2017.11.029. ISSN 1464-343X.
  2. ^ Weishampel, David B; et al. (2004). "Dinosaur distribution (Early Cretaceous, Africa)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 571-573. ISBN 0-520-24209-2.
  3. ^ WINKLER, DALE A.; GOMANI, ELIZABETH M.; JACOBS, LOUIS L. (2000). "COMPARATIVE TAPHONOMY OF AN EARLY CRETACEOUS SAUROPOD QUARRY, MALAWI, AFRICA". Paleont. Soc. Korea Special Publication. 4: 99–114.
  4. ^ Gomani, E.M. 2005. Sauropod dinosaurs from the Early Cretaceous of Malawi, Africa: Palaeontologia Electronica 8 (issue 1 - n. 27a): 37 pages.
  5. ^ Jacobs L. D. Winkler, Gomani E. (1993). "New material of an Early Cretaceous titanosaurid dinosaur from Malawi". Palaeontology. 36 (3): 523–534.
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