The Dinosaur Park Formation is the uppermost member of the Belly River Group (also known as the Judith River Group), a major geologic unit in southern Alberta. It was deposited during the Campanian stage of the Late Cretaceous, between about 76.5 and 74.4 million years ago.[3] It was deposited in alluvial and coastal plain environments, and it is bounded by the nonmarine Oldman Formation below it and the marine Bearpaw Formation above it.[4]
Dinosaur Park Formation | |
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Stratigraphic range: Late Cretaceous, Campanian, | |
![]() Dinosaur Park Formation exposed along the Red Deer River in Dinosaur Provincial Park, southeastern Alberta, Canada. | |
Type | Geological formation |
Unit of | Belly River Group |
Underlies | Bearpaw Formation |
Overlies | Oldman Formation |
Lithology | |
Primary | Sandstone (lower) Mudstone and siltstone (upper) |
Other | Bentonite and coal |
Location | |
Coordinates | 49°12′N 110°24′W / 49.2°N 110.4°W |
Approximate paleocoordinates | 56°24′N 75°48′W / 56.4°N 75.8°W |
Region | ![]() |
Country | ![]() |
Extent | Western Canadian Sedimentary Basin |
Type section | |
Named for | Dinosaur Provincial Park |
Named by | Eberth, D.A. and Hamblin, A.P.[1][2] |
Year defined | 1993 |
The Dinosaur Park Formation contains dense concentrations of dinosaur skeletons, both articulated and disarticulated, which are often found with preserved remains of soft tissues. Remains of other animals such as fish, turtles, and crocodilians, as well as plant remains, are also abundant.[5] The formation has been named after Dinosaur Provincial Park, a UNESCO World Heritage Site where the formation is well exposed in the badlands that flank the Red Deer River.[2]
Geological setting
editThe Dinosaur Park Formation is composed of sediments that were derived from the erosion of the mountains to the west. It was deposited on an alluvial to coastal plain by river systems that flowed eastward and southeastward to the Bearpaw Sea, a large inland sea that was part of the Western Interior Seaway. That sea gradually inundated the adjacent coastal plain, depositing the marine shales of the Bearpaw Formation on top of the Dinosaur Park Formation.[4]
The Dinosaur Park Formation is about 70 metres (230 ft) thick at Dinosaur Park. The lower portion of the formation was laid down in fluvial channel environments and consists primarily of fine- to medium-grained, crossbedded sandstones. The upper portion, which was deposited in overbank and floodplain environments, consists primarily of massive to laminated, organic-rich mudstones with abundant root traces, and thin beds of bentonite. The Lethbridge Coal Zone, which consists of several seams of low-rank coal interbedded with mudstones and siltstones, marks the top of the formation.[4]
The sediments of the Dinosaur Park Formation are similar to those of the underlying Oldman Formation and they were originally included in that formation. The two formations are separated by a regional disconformity, however, and are distinguished by petrographic and sedimentologic differences. In addition, articulated skeletal remains and bonebeds are rare in the Oldman Formation but abundant in the Dinosaur Park Formation.[2][4]
Biostratigraphy
editThe Dinosaur Park Formation can be divided into at least two distinct faunas. The lower part of the formation is characterized by the abundance of Corythosaurus and Centrosaurus. This group of species is replaced higher in the formation by a different ornithischian fauna characterized by the presence of Lambeosaurus and Styracosaurus.[6] The appearance of several new, rare species of ornithischian at the very top of the formation may indicate that a third distinct fauna had replaced the second during the transition into younger, non-Dinosaur Park sediments, at the same time an inland sea transgresses onto land, but there are fewer remains here. An unnamed pachyrhinosaur, Vagaceratops irvinensis, and Lambeosaurus magnicristatus may be more common in this third fauna.[7][8]
The timeline below follows a synthesis presented by Fowler (2017)[9] with additional information from Arbour et al. 2009,[10] Evans et al. 2009, and Penkalski, 2013.[11] Megaherbivore Assemblage Zones (MAZ) follow data presented by Mallon et al., 2012.[12]
![](http://upload.wikimedia.org/wikipedia/en/timeline/e4jvacssc9glr4tz7mh6i5yrfj8wt0l.png)
Amphibians
editRemains of the following amphibians have been found in the formation:[13]
Albanerpetontidae (extinct, salamander-like amphibians)
- Habrosaurus prodilatus
- Lisserpeton
- Opisthotriton kayi
- Scapherpeton tectum
- unnamed caudatan
- Two indeterminate caudatans
- Two unnamed salientans
- Tyrrellbatrachus brinkmani[14]
- Hensonbatrachus kermiti[15]
Dinosaurs
editRemains of the following dinosaurs have been found in the formation:[10][16]
Ornithischians
editRemains of the following ornithischians have been found in the formation:[17]
Ankylosaurs
editAnkylosaurs from the Dinosaur Park Formation | ||||||
---|---|---|---|---|---|---|
Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
Anodontosaurus | A. inceptus | Middle, 75.6 Ma ago | [Two] skulls with teeth, mandible, partially prepared skeleton, both cervical half-rings, and osteoderms.[18] | An ankylosaurine ankylosaurid | ||
Dyoplosaurus | D. acutosquameus | Lower, 76.5 Ma ago[10] | A partial skull and skeleton including pelvis, tail, and hindlimb with pes, and osteoderms.[18] | An ankylosaurine ankylosaurid | ||
Edmontonia | E. rugosidens | Lower, 76.5-75.9 Ma ago[10] | A partial skeleton including a skull, dorsal vertebrae, proximal, distal caudal, ribs, humerus, ulna, radius, manus, fragments of the pelvis, tibia, fibula?, osteoderms; anterior half of an articulated skeleton with in situ osteoderms, and paired first medial scutes. | A nodosaurine nodosaurid also known from the Horseshoe Canyon Formation and Two Medicine Formation | ||
Euoplocephalus | E. tutus | Lower to Middle, ~76.4-75.6 Ma ago[11] | [Four] skulls, mandible, cervical vertebrae, dorsal vertebrae, ribs, scapulae, humeri, radius, ulna, metacarpals, phalanx, ilium, ischium, femur, tibia, partial pes, sacrum, cervical half-rings, and osteoderms.[18] | An ankylosaurine ankylosaurid | ||
Panoplosaurus | P. mirus | Middle, 75.6 Ma ago[10] | Skull with lower jaws, isolated teeth, cervical vertebrae, dorsal vertebrae, sacral vertebrae, cervical ribs, dorsal ribs, scapulocoracoid, humerus, manus, tibia, fibula, ossified intersternal plate, a pair of ossified xiphoid processes, pes, and in situ osteoderms.[19] | A nodosaurine nodosaurid | ||
Platypelta | P. coombsi | Lower, 77.5-76.5 Ma ago[18] | A well-preserved skull, mandibles, teeth, cervical and dorsal vertebrae, ribs, complete pelvis, both scapulocoracoids, both humeri and radii, both cervical half-rings, and osteoderms.[18] | An ankylosaurine ankylosaurid | ||
Scolosaurus | S. cutleri | Lower, 76.5 Ma ago or more[11] | A nearly complete skeleton, a skull, cervical, dorsal, and caudal vertebrae, ribs, scapula, coracoid, humeri, radii, ilium, ischium, femur, tibia, fibula, [one] cervical half-ring, and osteoderms.[18] | An ankylosaurine ankylosaurid briefly thought to be synonymous with Euoplocephalus. It possibly came from the upper layers of the underlying Oldman Formation.[20] | ||
S. thronus | Upper, 75 Ma ago | A partial skeleton including a skull, dorsal vertebrae, ?complete synsacrum, sacral ribs, caudal vertebrae, scapula, partial ilia, humerus, cervical half-rings, osteoderms, and skin impressions.[18] | An ankylosaurine ankylosaurid |
Ceratopsians
editAn unnamed Pachyrhinosaurus-like taxon has been recovered from the formation.[21]
Ceratopsians from the Dinosaur Park Formation | ||||||
---|---|---|---|---|---|---|
Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
Centrosaurus | C. apertus | Middle, 76.2-75.5Ma ago[10] | "[Fifteen] skulls, several skeletons, all adult; abundant bone-bed material with rare juveniles and subadults."[22][23] C. nasicornis may be a synonym. | A centrosaurine ceratopsid | ||
Chasmosaurus | C. belli | Middle, 76–75.5Ma ago[10] | "[Twelve] skulls, several skeletons."[22] | A chasmosaurine ceratopsid | ||
C. russelli | Lower, 76.5-76Ma ago[10] | "[Six] complete or partial skulls."[24] | ||||
Mercuriceratops | M. gemini[25] | Lower, ~77Ma ago[25] | "one apomorphic squamosal"[25] | A chasmosaurine ceratopsid | ||
Monoclonius | M. lowei | A dubious centrosaurine ceratopsid. Possibly synonymous with Centrosaurus. | ||||
Pentaceratops[26] | P. aquilonius[26] | Uppermost, 74.8 MA[26] | two frill fragments[26] | A dubious chasmosaurine ceratopsid that may be the same species as Spiclypeus shipporum.[27] | ||
Spinops[28] | S. sternbergorum[28] | Lower, 76.5Ma[28] | "partial parietal bone, partial dentary, unidentifiable limb fragments, partial skull, and partial right squamosal."[28] | A centrosaurine ceratopsid.It may actually be from the upper Oldman Formation.[28] | ||
Styracosaurus | S. albertensis | Upper, 75.5-75.2Ma ago[10] | "[Two] skulls, [three] skeletons, additional material in bone beds."[22] | A centrosaurine ceratopsid | ||
Unescoceratops | U. koppelhusae | Partial lower jaw[29] | A leptoceratopsid thought to have been between one and two meters long and less than 91 kilograms. Its teeth were the roundest of all leptoceratopsids. | |||
Vagaceratops | V. irvinensis | Upper, 75Ma ago[10] | "[Three] skulls, skeleton lacking tail."[24] | A chasmosaurine ceratopsid species previously classified as a species of Chasmosaurus.[30] |
Ornithopods
editAt least one indeterminate thescelosaurid specimen has been recovered from the formation.
In a 2001 review of hadrosaur eggshell and hatchling material from the Dinosaur Park Formation, Darren H. Tanke and M. K. Brett-Surman concluded that hadrosaurs nested in both the ancient upland and lowlands of the formation's depositional environment.[31] The upland nesting grounds may have been preferred by the less common hadrosaurs, like Brachylophosaurus or Parasaurolophus. However, the authors were unable to determine what specific factors shaped nesting ground choice in the formation's hadrosaurs. They suggested that behavior, diet, soil condition, and competition between dinosaur species all potentially influenced where hadrosaurs nested.[32]
Sub-centimeter fragments of pebbly-textured hadrosaur eggshell have been reported from the Dinosaur Park Formation. This eggshell is similar to the hadrosaur eggshell of Devil's Coulee in southern Alberta as well as that of the Two Medicine and Judith River Formations in Montana, United States.[33] While present, dinosaur eggshell is very rare in the Dinosaur Park Formation and is only found in two different microfossil sites.[31] These sites are distinguished by large numbers of pisidiid clams and other less common shelled invertebrates like unionid clams and snails. This association is not a coincidence as the invertebrate shells would have slowly dissolved and released enough basic calcium carbonate to protect the eggshells from naturally occurring acids that otherwise would have dissolved them and prevented fossilization.[33]
In contrast with eggshell fossils, the remains of very young hadrosaurs are actually somewhat common. Darren Tanke has observed that an experienced collector could actually discover multiple juvenile hadrosaur specimens in a single day. The most common remains of young hadrosaurs in the Dinosaur Park Formation are dentaries, bones from limbs and feet, as well as vertebral centra. The material showed little or none of the abrasion that would have resulted from transport, meaning the fossils were buried near their point of origin.[34] Bonebeds 23, 28, 47, and 50 are productive sources of young hadrosaur remains in the formation, especially bonebed 50. The bones of juvenile hadrosaurs and fossil eggshell fragments are not known to have preserved in association with each other, despite both being present in the formation.[35]
Ornithopods from the Dinosaur Park Formation | ||||||
---|---|---|---|---|---|---|
Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
Corythosaurus | C. casuarius | Lower-Middle, 76.5-75.5Ma ago[10] | "Approximately [ten] articulated skulls and associated postcrania, [ten to fifteen] articulated skulls, isolated skull elements, juvenile to adult."[36] | A lambeosaurin lambeosaurine hadrosaur | ||
Gryposaurus | G. notabilis | Lower, 76.2-76Ma ago[10] | "Approximately [ten] complete skulls, [twelve] fragmentary skulls, associated postcrania."[37] | A kritosaurin saurolophine hadrosaur | ||
Lambeosaurus | L. lambei | Upper, 75.5-75Ma ago[10] | "Approximately [seven] articulated skulls with associated postcrania, [possibly ten] articulated skulls, isolated skull elements, juvenile to adult."[38] | |||
L. magnicristatus | Upper/Bearpaw Formation, 74.8Ma ago[10] | "[Two] complete skulls, one with associated, articulated postcrania."[38] | ||||
Parasaurolophus | P. walkeri | Lower, 76.5-75.3Ma ago[8] | "Complete skull and postcranial skeleton."[38] | A parasaurolophin lambeosaurine hadrosaur. | ||
Prosaurolophus | P. maximus | Upper, 75.5 – 74.8 Ma | "[Twenty to twenty-five] individuals, including at least [seven] articulated skulls and associated postcrania."[37] | A saurolophin saurolophine hadrosaur |
Pachycephalosaurs
editPachycephalosaurs from the Dinosaur Park Formation | ||||||
---|---|---|---|---|---|---|
Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
F. brevis |
Also present in the Oldman Formation |
Frontoparetal dome, various other skull fragments including juvenile and subadult material |
Once thought to be a species of Stegoceras |
|||
G. albertae |
"Frontoparietal dome."[39] |
Potentially synonymous with Stegoceras validum.[40] |
| |||
H. sternbergi |
Lower, also present in the Oldman Formation and Judith River Formation |
Potentially synonymous with Stegoceras validum.[40] |
| |||
S. lyonsi[41] |
Upper, 76.10 ± 0.5 Ma[41] |
Right squamosal[41] |
||||
S. validum |
Specimens including frontoparietal dome.[39] |
| ||||
A nomen nudum. |
Theropods
editIn the Dinosaur Park Formation, small theropods are rare due to the tendency of their thin-walled bones to be broken or poorly preserved.[42] Small bones of small theropods that were preyed upon by larger ones may have been swallowed whole and digested.[43] In this context, the discovery of a small theropod dinosaur with preserved tooth marks was especially valuable.[42] Possible indeterminate avimimid remains are known from the formation.
Ornithomimids
editOrnithomimids from the Dinosaur Park Formation | ||||||
---|---|---|---|---|---|---|
Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
Ornithomimus | O. sp.[44] | Type specimen | An ornithomimid, possibly a species of Struthiomimus.[45] | |||
Qiupalong | Q. sp.[46] | Several specimens | An ornithomimid, possibly a radiation of this genus from Asia.[46] | |||
Rativates | R. evadens | Type specimen | An ornithomimid, formerly a specimen of Struthiomimus.[47] |
Oviraptorosaurs
editColor key
|
Notes Uncertain or tentative taxa are in small text; |
Oviraptorosaurs from the Dinosaur Park Formation | ||||||
---|---|---|---|---|---|---|
Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
Caenagnathus | C. collinsi | Mandible, type specimen | A caenagnathid[48] which rivalled Anzu in size.[49] | |||
Chirostenotes | C. pergracilis | Several fragmentary specimens, type specimen | A mid-sized caenagnathid. | |||
Citipes | C. elegans[49] | Several fragmentary specimens, type specimen | Smallest caenagnathid from the formation.[49] | |||
Macrophalangia | M. canadensis | Junior synonym of Chirostenotes pergracilis |
Paravians
editA new taxon of troodontid based solely on teeth is known from the upper part of the formation.[50]
Paravians from the Dinosaur Park Formation | ||||||
---|---|---|---|---|---|---|
Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
cf. Baptornis | Indeterminate | A hesperornithine bird | ||||
cf. Cimolopteryx | Indeterminate | Partial coracoid | A possible charadriiform bird | |||
Dromaeosaurus | D. albertensis | Several specimens and teeth, type specimen | A dromaeosaurid | |||
Hesperonychus | H. elizabethae | Hip bones and partial toes and claws, type specimen | A dromaeosaurid or an avialan,[51][52] also found in the Oldman Formation | |||
Latenivenatrix | L. mcmasterae | Hip bones, pelvis, skull fragments, type specimen | A large troodontid measuring 3–3.5 m (9.8–11.5 ft). | |||
cf. Palintropus | Unnamed | Partial shoulder girdles | An ambiortiform bird | |||
cf. Paronychodon | cf. P. lacustris | Teeth | An indeterminate maniraptoran, also found in the Judith River | |||
cf. Pectinodon[53] | Indeterminate | Teeth | A troodont | |||
Polyodontosaurus | P. grandis | Dentary, type specimen | Nomen dubium. Possibly synonymous with Latenivenatrix. | |||
Richardoestesia | R. gilmorei | Mandible, type specimen | A dromaeosaurid | |||
R. isosceles[50] | Teeth | |||||
Saurornitholestes | S. langstoni | Incomplete skeleton and teeth, type specimen. A dentary referred to Saurornitholestes was discovered that preserved tooth marks left by a young tyrannosaur.[54] | A dromaeosaurid | |||
Stenonychosaurus | S. inequalis | Nearly complete skeleton and other partial skeletons, type specimen | A troodontid once thought to be a species of Troodon |
Tyrannosaurs
editTyrannosaurs from the Dinosaur Park Formation | ||||||
---|---|---|---|---|---|---|
Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
Daspletosaurus | D. wilsoni[55] | Middle-Upper, ~75 Ma ago[10] | Several specimens | A tyrannosaurine tyrannosaurid, also present in the Bearpaw Formation. | ||
Gorgosaurus | G. libratus | Lower-Middle, 76.5–75 Ma ago[10] | Numerous specimens, type specimen[56] | An albertosaurine tyrannosaurid whose fossils have been unearthed in the Judith River Formation and possibly the Two Medicine Formation. It was the most common large carnivore in the area.[57] |
Color key
|
Notes Uncertain or tentative taxa are in small text; |
Other reptiles
editChoristoderes
editChoristoderes, or champsosaurs, were aquatic reptiles. Small examples looked like lizards, while larger types were superficially similar to crocodilians. Remains of the following Choristoderes have been found in the formation:[58]
- Champsosaurus (at least 3 species)
- Cteniogenys sp. cf. antiquus (possibly another genus)
Crocodylians
editRemains of the following Crocodylians have been found in the formation:[59]
- Albertochampsa
- Leidyosuchus
- at least 1 unnamed taxon
Lizards
editRemains of the following lizards have been found in the formation:[60]
Plesiosaurs
editRemains of the following Plesiosaurs have been found in the formation:[61]
- Fluvionectes
- indeterminate polycotylids (shorter-necked)
Pterosaurs
editRemains of the following pterosaurs have been found in the formation:[62]
- Cryodrakon [63] (known from small and large specimens)
- 1 unnamed non-azhdarchid pterosaur
Turtles
editRemains of the following turtles have been found in the formation:[64]
- Adocus
- "Apalone"
- Aspideretoides (3 species)
- Basilemys
- Boremys
- Judithemys
- Neurankylus
- Plesiobaena
- 2 indeterminate taxa
Mammals
editRemains of the following mammals have been found in the formation:[65]
- Multituberculata
- Cimexomys sp.
- Cimolodon spp.
- Cimolomys clarki
- Meniscoessus major
- Mesodma primaeva
- unnamed multituberculates
- Metatherians
- Alphadon halleyi
- Eodelphis browni
- E. cutleri
- 5 species of "Pediomys"
- Turgidodon russelli
- T. praesagus
- Eutherians
- Cimolestes sp. (uncertain taxonomy)
- Gypsonictops lewisi
- Paranyctoides sternbergi
- Unknown therians: at least 1 species
Fish
editRemains of the following fish have been found in the formation:[66]
- Chondrichthyans
- Cretorectolobus olsoni (a carpet shark)
- Eucrossorhinus microcuspidatus (a carpet shark)
- Ischyrhiza mira (a sclerorhynchid)[67]
- Meristodonoides montanensis (a shark)
- Myledaphus bipartitus (a ray)
- Protoplatyrhina renae (a guitarfish)
- indeterminate orectolobid
- Acipenseriformes (sturgeons)
- "Acipenser albertensis"
- Anchiacipenser acanthaspis[68]
- unnamed sturgeon
- unnamed paddlefish
- Holostean fish
- Lepisosteus occidentalis (the gar)
- unnamed bowfin
- at least 2 other holosteans
- Teleost fish
- Belonostomus longirostris
- Cretophareodus (an osteoglossomorph)
- Coriops amnicolus
- Estesesox foxi (a pike)
- Oldmanesox (a pike)
- Paralbula (including Phyllodus)
- Paratarpon apogerontus (an elopomorph, like the tarpon)
- Primuluchara (a characin)[69][70]
- at least 8 other teleosts
Invertebrates
editRemains of the following invertebrates have been found in the formation:[71]
- Freshwater bivalves
- Freshwater gastropods
- Campeloma (2 species)
- Elimia
- Goniobasis (3 species)
- Hydrobia
- Lioplacodes (2 species)
Flora
editPlant body fossils
editThe following plant body fossils have been found in the formation:[72]
- various ferns
- Equisetum (Equisetaceae)
- Gymnosperms
- Platyspiroxylon (Cupressaceae)
- Podocarpoxylon (Podocarpaceae)
- Elatocladus (Taxodiaceae)
- Sequoia (Taxodiaceae)
- Sequoiaxylon (Taxodiaceae)
- Taxodioxylon (Taxodiaceae)
- Ginkgos
- Angiosperms
Palynomorphs
editPalynomorphs are organic-walled microfossils, like spores, pollen, and algae. The following palynomorphs have been found in the formation:[73]
- Unknown producers
- at least 8 species
- Fungi
- at least 35 taxa
- Chlorophyta (green algae and blue-green algae)
- at least 12 species
- Pyrrhophyta (dinoflagellates, a type of marine algae)
- unassigned cysts
- Bryophytes (mosses, liverworts, and hornworts)
- Anthocerotophyta (hornworts)
- at least 5 species
- Marchantiophyta (liverworts)
- at least 14 species
- Bryophyta (mosses)
- at least 5 species
- Anthocerotophyta (hornworts)
- Lycopodiophyta
- Lycopodiaceae (club mosses)
- at least 11 species
- Selaginellaceae (small club mosses)
- at least 6 species
- Isoetaceae (quillworts)
- at least 1 species
- Lycopodiaceae (club mosses)
- Polypodiophyta
- Osmundaceae (cinnamon ferns)
- at least 6 species
- Schizaeaceae (climbing ferns)
- at least 20 species
- Gleicheniaceae (Gleichenia and allies; coral ferns)
- at least 5 species
- Cyatheaceae (Cyathea and allies)
- at least 4 species
- Dicksoniaceae (Dicksonia and allies)
- at least 3 species
- Polypodiaceae (ferns)
- at least 4 species
- Matoniaceae
- at least 1 species
- Marsileaceae
- at least 1 species
- Osmundaceae (cinnamon ferns)
- Pinophyta (gymnosperms)
- Cycadaceae (cycads)
- at least 3 species
- Caytoniaceae
- at least 1 species
- Pinaceae (pines)
- at least 4 species
- Cupressaceae (cypresses)
- at least 3 species
- Podocarpaceae (Podocarpus and allies)
- at least 4 species
- Cheirolepidiaceae
- at least 2 species
- Ephedraceae (Mormon teas)
- at least 6 species
- Unknown gymnosperms: at least 3 species
- Cycadaceae (cycads)
- Magnoliophyta (angiosperms)
- Magnoliopsida (dicots)
- Buxaceae (boxwood)
- at least 1 species
- Gunneraceae (gunneras)
- at least 1 species
- Salicaceae (willows, cottonwood, quaking aspen)
- at least 1 species
- Droseraceae (sundews)
- at least 1 species
- Olacaceae (tallowwood)
- at least 2 species
- Loranthaceae (showy mistletoes)
- at least 1 species
- Sapindaceae (soapberry)
- at least 1 species
- Aceraceae (maples)
- at least 1 species
- Proteaceae (proteas)
- at least 9 species
- Compositae (sunflowers)
- at least 1 species
- Fagaceae (beeches, oaks, chestnuts)
- at least 2 species
- Betulaceae (birches, alders)
- at least 1 species
- Ulmaceae (elms)
- at least 1 species
- Chenopodiaceae (goosefoots)
- at least 1 species
- Buxaceae (boxwood)
- Liliopsida (monocots)
- Liliaceae (lilies)
- at least 6 species
- Cyperaceae (sedges)
- at least 1 species
- Sparganiaceae (bur-reeds)
- possibly 1 species
- Unknown angiosperms: at least 88 species
- Liliaceae (lilies)
- Magnoliopsida (dicots)
Timeline of new taxa
editThe following timeline displays valid taxa first discovered in the dinosaur park formation. Some species may have been referred to other genera subsequent to their initial description.
![](http://upload.wikimedia.org/wikipedia/en/timeline/dktnopbcj55rfisnytni9rh34zq3oyn.png)
See also
editFootnotes
edit- ^ Lexicon of Canadian Geologic Units: Dinosaur Park Formation Archived 2013-02-21 at archive.today
- ^ a b c Eberth, D.A.; Hamblin, A.P. (1993). "Tectonic, stratigraphic, and sedimentologic significance of a regional discontinuity in the upper Judith River Group (Belly River wedge) of southern Alberta, Saskatchewan, and northern Montana". Canadian Journal of Earth Sciences. 30 (1): 174–200. Bibcode:1993CaJES..30..174E. doi:10.1139/e93-016.
- ^ Ramezani, Jahandar; Beveridge, Tegan L.; Rogers, Raymond R.; Eberth, David A.; Roberts, Eric M. (2022-09-26). "Calibrating the zenith of dinosaur diversity in the Campanian of the Western Interior Basin by CA-ID-TIMS U–Pb geochronology". Scientific Reports. 12 (1): 16026. Bibcode:2022NatSR..1216026R. doi:10.1038/s41598-022-19896-w. ISSN 2045-2322. PMC 9512893. PMID 36163377.
- ^ a b c d Eberth, D.A. 2005. The geology. In: Currie, P.J., and Koppelhus, E.B. (eds), Dinosaur Provincial Park: A Spectacular Ancient Ecosystem Revealed. Indiana University Press: Bloomington and Indianapolis, p.54-82. ISBN 0-253-34595-2.
- ^ Currie, P.J., and Koppelhus, E.B. (eds), Dinosaur Provincial Park: A Spectacular Ancient Ecosystem Revealed. Indiana University Press: Bloomington and Indianapolis, p. 277-291. ISBN 0-253-34595-2.
- ^ Mallon, Jordan C.; S, Jason (2012). "Megaherbivorous dinosaur turnover in the Dinosaur Park Formation (upper Campanian) of Alberta, Canada". Palaeogeography, Palaeoclimatology, Palaeoecology. 350–352: 124–138. Bibcode:2012PPP...350..124M. doi:10.1016/j.palaeo.2012.06.024.
- ^ Ryan and Evans (2005).
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