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Laramie

FormationLaramie
Age:66.0 - 56.0 Ma
Paleocene
IntervalLancian
Lithologymudstone/sandstone, mudstone, sandstone/coal, sandstone/"shale", sandstone, "shale"
Number of Collections39
Number of Occurrences158

Recorded Sample Locations

LocationRegionStratigraphic Name
Ken's SiteWeld County, Colorado, USALaramie
KJ9915 Elbert County, Colorado, USALaramie
Mount EvertsLaramie
Tuffaceous Lake Beds - western Bighorn BasinPark County, Wyoming, USALaramie
USGS locality 326 Mount CarbonJefferson County, Colorado, USALaramie
Hatcher SpringsConverse County, Wyoming, USALaramie
Middle ForkNiobrara County, Wyoming, USALaramie
Middle ForkNiobrara County, Wyoming, USALaramie
1.5 miles below U-L ranchConverse County, Wyoming, USALaramie
Lance CreekNiobrara County, Wyoming, USALaramie
3 miles southwest of Lightning CreekNiobrara County, Wyoming, USALaramie
west sideNiobrara County, Wyoming, USALaramie
Owl Creek Weld County, Colorado, USALaramie
Bijou Creek Routt County, Colorado, USALaramie
2 miles north of BriggsdaleWeld County, Colorado, USALaramie
East Bijou CreekAdams County, Colorado, USALaramie
Leyden Gulch Jefferson County, Colorado, USALaramie
Marshall tracksite Boulder County, Colorado, USALaramie
Hunter-Douglas ceratopsian siteBoulder County, Colorado, USALaramie
USGS locality 8187El Paso County, Colorado, USALaramie
Fossil Trace Golf CourseJefferson County, Colorado, USALaramie
12th Street tracksite Jefferson County, Colorado, USALaramie
Dog Pond Area Weld County, Colorado, USALaramie
Natural FortWeld County, Colorado, USALaramie
Ingrid's JawWeld County, Colorado, USALaramie
DMNH 2364Denver County, Colorado, USALaramie
DMNH locality 2300Douglas County, Colorado, USALaramie
12 miles northeast of BriggsdaleWeld County, Colorado, USALaramie

Associated Units

Stratigraphic NameAgeLithologyOccurrence Records
Denver66.0 - 56.0 Ma
Paleocene
shale/sandstone, mudstone, claystone/"shale", "shale"/claystone, claystone, sandstone, coal424
Fox Hills Sandstone72.1 - 66.0 Ma
Late/Upper Cretaceous
sandstone2
Lamar River48.6 - 37.2 Ma
Eocene
28
Sepulcher48.6 - 37.2 Ma
Eocene
189
Willwood50.3 - 46.2 Ma
Eocene
shale, siltstone/sandstone, mudstone, sandstone, wackestone, "limestone", "siliciclastic", wackestone/"carbonate", "siliciclastic"/mudstone, siltstone7242

Recorded Fossils

Accepted NameHierarchyAge
Sabalites sp.
genus
6Plantae : Tracheophyta : Liliopsida : Arecales : Arecaceae : Sabalites70.6 - 66 Ma
Late/Upper Cretaceous
Allantodiopsis erosa
species
7Allantodiopsis : Allantodiopsis erosa100.5 - 66 Ma
Late/Upper Cretaceous
Andromeda grayana
species
7Plantae : Tracheophyta : Magnoliopsida : Ericales : Ericaceae : Andromeda : Andromeda grayana72.1 - 66 Ma
Late/Upper Cretaceous
Anemia subcretacea
species
7Plantae : Tracheophyta : Polypodiopsida : Schizaeales : Anemiaceae : Anemia : Anemia subcretacea72.1 - 66 Ma
Late/Upper Cretaceous
Diospyros stenosepala
species
7Plantae : Tracheophyta : Magnoliopsida : Ericales : Ebenaceae : Diospyros : Diospyros stenosepala72.1 - 66 Ma
Late/Upper Cretaceous
Dombeyopsis platanoides
species
7Plantae : Tracheophyta : Magnoliopsida : Malvales : Malvaceae : Dombeyopsis : Dombeyopsis platanoides72.1 - 66 Ma
Late/Upper Cretaceous
Fraxinus denticulata
species
7Plantae : Tracheophyta : Magnoliopsida : Lamiales : Oleaceae : Fraxinus : Fraxinus denticulata72.1 - 66 Ma
Late/Upper Cretaceous
Geonomites schimperi
species
7Geonomites schimperi72.1 - 66 Ma
Late/Upper Cretaceous
Malapoenna weediana
species
7Plantae : Tracheophyta : Magnoliopsida : Laurales : Lauraceae : Malapoenna : Malapoenna weediana72.1 - 66 Ma
Late/Upper Cretaceous
Myrica bolanderi
species
7Plantae : Tracheophyta : Magnoliopsida : Fagales : Myricaceae : Myrica : Myrica bolanderi72.1 - 66 Ma
Late/Upper Cretaceous
Myrtophyllum torreyi
species
7Myrtophyllum : Myrtophyllum torreyi66 - 56 Ma
Paleocene
Onoclea minima
species
7Plantae : Tracheophyta : Polypodiopsida : Polypodiales : Onocleaceae : Onoclea : Onoclea minima72.1 - 66 Ma
Late/Upper Cretaceous
Paliurus minimus
species
7Plantae : Tracheophyta : Magnoliopsida : Rosales : Rhamnaceae : Paliurus : Paliurus minimus72.1 - 66 Ma
Late/Upper Cretaceous
Paliurus zizyphoides
species
7Plantae : Tracheophyta : Magnoliopsida : Rosales : Rhamnaceae : Paliurus : Paliurus zizyphoides72.1 - 66 Ma
Late/Upper Cretaceous
Paloreodoxites plicatus
species
7Paloreodoxites : Paloreodoxites plicatus66 - 56 Ma
Paleocene
Phragmites falcata
species
7Plantae : Tracheophyta : Liliopsida : Poales : Poaceae : Phragmites : Phragmites falcata72.1 - 66 Ma
Late/Upper Cretaceous
Quercus ellisiana
species
7Plantae : Tracheophyta : Magnoliopsida : Fagales : Fagaceae : Quercus : Quercus ellisiana72.1 - 66 Ma
Late/Upper Cretaceous
Sabal imperialis
species
7Sabal : Sabal imperialis66 - 56 Ma
Paleocene
Sequoia langsdorfii
species
7Plantae : Tracheophyta : Pinopsida : Pinales : Cupressaceae : Sequoia : Sequoia langsdorfii72.1 - 66 Ma
Late/Upper Cretaceous
Sequoia reichenbachi
species
7Plantae : Tracheophyta : Pinopsida : Pinales : Cupressaceae : Sequoia : Sequoia reichenbachi72.1 - 66 Ma
Late/Upper Cretaceous
Trapa microphylla
species
7Plantae : Tracheophyta : Magnoliopsida : Myrtales : Lythraceae : Trapa : Trapa microphylla72.1 - 66 Ma
Late/Upper Cretaceous
Viburnum rotundifolium
species
7Plantae : Tracheophyta : Magnoliopsida : Dipsacales : Adoxaceae : Viburnum : Viburnum rotundifolium72.1 - 66 Ma
Late/Upper Cretaceous
Magnoliopsida
class
3Plantae : Tracheophyta : Magnoliopsida70.6 - 66 Ma
Late/Upper Cretaceous
Dryophyllum sp.
genus
6Plantae : Tracheophyta : Magnoliopsida : Fagales : Juglandaceae : Dryophyllum70.6 - 66 Ma
Late/Upper Cretaceous
Myrica sp.
genus
6Plantae : Tracheophyta : Magnoliopsida : Fagales : Myricaceae : Myrica70.6 - 66 Ma
Late/Upper Cretaceous
Platanaceae
family
5Plantae : Tracheophyta : Magnoliopsida : Proteales : Platanaceae70.6 - 66 Ma
Late/Upper Cretaceous
Ampelopsis acerifolia
species
7Plantae : Tracheophyta : Magnoliopsida : Vitales : Vitaceae : Ampelopsis : Ampelopsis acerifolia66 - 56 Ma
Paleocene
Cissus sp.
genus
6Plantae : Tracheophyta : Magnoliopsida : Vitales : Vitaceae : Cissus66 - 56 Ma
Paleocene
Averrhoites affinis
species
7Plantae : Tracheophyta : Magnoliopsida : Oxalidales : Oxalidaceae : Averrhoites : Averrhoites affinis66 - 56 Ma
Paleocene
Cercidiphyllum sp.
genus
6Plantae : Tracheophyta : Magnoliopsida : Saxifragales : Cercidiphyllaceae : Cercidiphyllum66 - 56 Ma
Paleocene
Ficus sp.
genus
6Plantae : Tracheophyta : Magnoliopsida : Rosales : Moraceae : Ficus66 - 56 Ma
Paleocene
Amia sp.
genus
6Animalia : Chordata : Actinopteri : Amiiformes : Amiidae : Amia70.6 - 66 Ma
Late/Upper Cretaceous
Lepisosteus occidentalis
species
7Animalia : Chordata : Actinopteri : Lepisosteiformes : Lepisosteidae : Lepisosteus : Lepisosteus occidentalis70.6 - 66 Ma
Late/Upper Cretaceous
Teleostei
unranked clade
99Animalia : Chordata : Actinopteri : Teleostei70.6 - 66 Ma
Late/Upper Cretaceous
Lonchidion selachos
species
7Animalia : Chordata : Chondrichthyes : Hybodontiformes : Lonchidiidae : Lonchidion : Lonchidion selachos70.6 - 66 Ma
Late/Upper Cretaceous
Myledaphus bipartitus
species
7Animalia : Chordata : Chondrichthyes : Myliobatiformes : Dasyatidae : Myledaphus : Myledaphus bipartitus70.6 - 66 Ma
Late/Upper Cretaceous
Squatirhina americana
species
7Animalia : Chordata : Chondrichthyes : Orectolobiformes : Orectolobidae : Squatirhina : Squatirhina americana70.6 - 66 Ma
Late/Upper Cretaceous
Ischyrhiza avonicola
species
7Animalia : Chordata : Chondrichthyes : Sclerorhynchiformes : Sclerorhynchidae : Ischyrhiza : Ischyrhiza avonicola70.6 - 66 Ma
Late/Upper Cretaceous
Mammalia
class
3Animalia : Chordata : Mammalia70.6 - 66 Ma
Late/Upper Cretaceous
Alphadon jasoni
species
7Animalia : Chordata : Mammalia : Herpetotheriidae : Nortedelphys : Alphadon jasoni70.6 - 66 Ma
Late/Upper Cretaceous
Multituberculata
order
4Animalia : Chordata : Mammalia : Multituberculata70.6 - 66 Ma
Late/Upper Cretaceous
Cimolodon sp.
genus
6Animalia : Chordata : Mammalia : Cimolodontidae : Cimolodon70.6 - 66 Ma
Late/Upper Cretaceous
Cimolomys sp.
genus
6Animalia : Chordata : Mammalia : Cimolomyidae : Cimolomys70.6 - 66 Ma
Late/Upper Cretaceous
Meniscoessus sp.
genus
6Animalia : Chordata : Mammalia : Taeniolabididae : Meniscoessus70.6 - 66 Ma
Late/Upper Cretaceous
Meniscoessus robustus
species
7Animalia : Chordata : Mammalia : Multituberculata : Cimolomyidae : Meniscoessus : Meniscoessus robustus70.6 - 66 Ma
Late/Upper Cretaceous
Paressonodon nelsoni
species
7Animalia : Chordata : Mammalia : Cimolomyidae : Paressonodon : Paressonodon nelsoni70.6 - 66 Ma
Late/Upper Cretaceous
Mesodma formosa
species
7Animalia : Chordata : Mammalia : Multituberculata : Neoplagiaulacidae : Mesodma : Mesodma formosa70.6 - 66 Ma
Late/Upper Cretaceous
Parikimys carpenteri
species
7Animalia : Chordata : Mammalia : Neoplagiaulacidae : Parikimys : Parikimys carpenteri70.6 - 66 Ma
Late/Upper Cretaceous
Gypsonictops sp.
genus
6Animalia : Chordata : Mammalia : Pilosa : Gypsonictopidae : Gypsonictops70.6 - 66 Ma
Late/Upper Cretaceous
Protalphadon sp.
genus
6Animalia : Chordata : Mammalia : Didelphimorphia : Didelphidae : Protalphadon70.6 - 66 Ma
Late/Upper Cretaceous
Schadipes sp.
genus
6Animalia : Chordata : Mammalia : Schadipes72.1 - 66 Ma
Late/Upper Cretaceous
Schadipes crypticus
species
7Animalia : Chordata : Mammalia : Schadipes : Schadipes crypticus72.1 - 66 Ma
Late/Upper Cretaceous
Aletridelphys hatcheri
species
7Animalia : Chordata : Mammalia : Pediomyidae : Aletridelphys : Aletridelphys hatcheri70.6 - 66 Ma
Late/Upper Cretaceous
Pediomys cooki
species
7Animalia : Chordata : Mammalia : Pediomyidae : Leptalestes : Pediomys cooki70.6 - 66 Ma
Late/Upper Cretaceous
Pediomyidae
unranked clade
99Animalia : Chordata : Mammalia : Pediomyidae70.6 - 66 Ma
Late/Upper Cretaceous
Ceratopsidae
family
5Animalia : Chordata : Reptilia : Dinosauria : Ceratopsidae72.1 - 66 Ma
Late/Upper Cretaceous
Torosaurus latus
species
7Animalia : Chordata : Reptilia : Dinosauria : Ceratopsidae : Torosaurus : Torosaurus latus72.1 - 66 Ma
Late/Upper Cretaceous
Triceratops sp.
genus
6Animalia : Chordata : Reptilia : Dinosauria : Ceratopsidae : Triceratops70.6 - 66 Ma
Late/Upper Cretaceous
Triceratops horridus
species
7Animalia : Chordata : Ornithischia : Ceratopsidae : Triceratops : Triceratops horridus72.1 - 66 Ma
Late/Upper Cretaceous
Triceratops prorsus
species
7Animalia : Chordata : Reptilia : Dinosauria : Ceratopsidae : Triceratops : Triceratops prorsus72.1 - 66 Ma
Late/Upper Cretaceous
Edmontosaurus sp.
genus
6Animalia : Chordata : Ornithischia : Hadrosauridae : Edmontosaurus72.1 - 66 Ma
Late/Upper Cretaceous
Edmontosaurus annectens
species
7Animalia : Chordata : Ornithischia : Hadrosauridae : Edmontosaurus : Edmontosaurus annectens72.1 - 66 Ma
Late/Upper Cretaceous
Edmontosaurus regalis
species
7Animalia : Chordata : Reptilia : Dinosauria : Hadrosauridae : Edmontosaurus : Edmontosaurus regalis72.1 - 66 Ma
Late/Upper Cretaceous
Hadrosauridae
family
5Animalia : Chordata : Reptilia : Dinosauria : Hadrosauridae72.1 - 66 Ma
Late/Upper Cretaceous
Ornithischia
unranked clade
99Animalia : Chordata : Ornithischia70.6 - 66 Ma
Late/Upper Cretaceous
Thescelosaurus sp.
genus
6Animalia : Chordata : Reptilia : Dinosauria : Thescelosauridae : Thescelosaurus70.6 - 66 Ma
Late/Upper Cretaceous
Caudata
unranked clade
99Animalia : Chordata : Osteichthyes : Comonecturoides : Caudata70.6 - 66 Ma
Late/Upper Cretaceous
Lisserpeton bairdi
species
7Animalia : Chordata : Osteichthyes : Caudata : Scapherpetontidae : Lisserpeton : Lisserpeton bairdi70.6 - 66 Ma
Late/Upper Cretaceous
Scapherpeton tectum
species
7Animalia : Chordata : Osteichthyes : Caudata : Scapherpetontidae : Scapherpeton : Scapherpeton tectum70.6 - 66 Ma
Late/Upper Cretaceous
Amphibia
class
3Animalia : Chordata : Amphibia72.1 - 66 Ma
Late/Upper Cretaceous
Osteichthyes
unranked clade
99Animalia : Chordata : Osteichthyes72.1 - 66 Ma
Late/Upper Cretaceous
Opisthotriton kayi
species
7Animalia : Chordata : Osteichthyes : Proteida : Batrachosauroididae : Opisthotriton : Opisthotriton kayi70.6 - 66 Ma
Late/Upper Cretaceous
Albanerpeton nexuosus
species
7Animalia : Chordata : Amphibia : Gymnophiona : Albanerpetontidae : Albanerpeton : Albanerpeton nexuosus70.6 - 66 Ma
Late/Upper Cretaceous
Reptilia
class
3Animalia : Chordata : Reptilia72.1 - 66 Ma
Late/Upper Cretaceous
Champsosaurus sp.
genus
6Animalia : Chordata : Reptilia : Champsosauridae : Champsosaurus70.6 - 66 Ma
Late/Upper Cretaceous
Brachychampsa montana
species
7Animalia : Chordata : Reptilia : Crocodylia : Crocodylidae : Brachychampsa : Brachychampsa montana70.6 - 66 Ma
Late/Upper Cretaceous
Crocodylidae
family
5Animalia : Chordata : Reptilia : Crocodylia : Crocodylidae70.6 - 66 Ma
Late/Upper Cretaceous
Borealosuchus sternbergii
species
7Animalia : Chordata : Reptilia : Crocodylia : Borealosuchus : Borealosuchus sternbergii70.6 - 66 Ma
Late/Upper Cretaceous
Sauria
suborder
4.3Animalia : Chordata : Reptilia : Eosuchia : Sauria70.6 - 66 Ma
Late/Upper Cretaceous
Dinosauria
order
4Animalia : Chordata : Reptilia : Dinosauria72.1 - 66 Ma
Late/Upper Cretaceous
Plesiosauria
unranked clade
99Animalia : Chordata : Reptilia : Sauropterygia : Plesiosauria72.1 - 66 Ma
Late/Upper Cretaceous
Peltosaurus piger
species
7Animalia : Chordata : Reptilia : Squamata : Anguidae : Odaxosaurus : Peltosaurus piger70.6 - 66 Ma
Late/Upper Cretaceous
Chamopsiidae
family
5Animalia : Chordata : Reptilia : Squamata : Chamopsiidae70.6 - 66 Ma
Late/Upper Cretaceous
Cryptodira
suborder
4.3Animalia : Chordata : Reptilia : Testudines : Cryptodira72.1 - 66 Ma
Late/Upper Cretaceous
Testudines
order
4Animalia : Chordata : Reptilia : Testudines70.6 - 66 Ma
Late/Upper Cretaceous
Adocus sp.
genus
6Animalia : Chordata : Reptilia : Testudines : Adocidae : Adocus70.6 - 66 Ma
Late/Upper Cretaceous
Baenidae
family
5Animalia : Chordata : Reptilia : Testudines : Baenidae70.6 - 66 Ma
Late/Upper Cretaceous
Cedrobaena brinkman
species
7Animalia : Chordata : Reptilia : Testudines : Baenidae : Cedrobaena : Cedrobaena brinkman70.6 - 66 Ma
Late/Upper Cretaceous
Plesiobaena antiqua
species
7Animalia : Chordata : Reptilia : Testudines : Baenidae : Plesiobaena : Plesiobaena antiqua72.1 - 66 Ma
Late/Upper Cretaceous
Basilemys sinuosa
species
7Animalia : Chordata : Reptilia : Testudines : Nanhsiungchelyidae : Basilemys : Basilemys sinuosa72.1 - 66 Ma
Late/Upper Cretaceous
Compsemys victa
species
7Animalia : Chordata : Reptilia : Testudines : Compsemydidae : Compsemys : Compsemys victa70.6 - 66 Ma
Late/Upper Cretaceous
Pantrionychidae
unranked clade
99Animalia : Chordata : Reptilia : Testudines : Pantrionychidae72.1 - 66 Ma
Late/Upper Cretaceous
Helopanoplia distincta
species
7Animalia : Chordata : Reptilia : Testudines : Trionychidae : Helopanoplia : Helopanoplia distincta70.6 - 66 Ma
Late/Upper Cretaceous
Trionychidae
family
5Animalia : Chordata : Reptilia : Testudines : Trionychidae70.6 - 66 Ma
Late/Upper Cretaceous
Trionychinae
unranked clade
99Animalia : Chordata : Reptilia : Testudines : Trionychidae : Trionychinae70.6 - 66 Ma
Late/Upper Cretaceous
Dromaeosauridae
family
5Animalia : Chordata : Reptilia : Dinosauria : Dromaeosauridae70.6 - 66 Ma
Late/Upper Cretaceous
Tyrannosaurus rex
species
7Animalia : Chordata : Reptilia : Dinosauria : Tyrannosauridae : Tyrannosaurus : Tyrannosaurus rex70.6 - 66 Ma
Late/Upper Cretaceous
Theropoda
unranked clade
99Animalia : Chordata : Saurischia : Theropoda72.1 - 66 Ma
Late/Upper Cretaceous
Asplenium haguei
species
7Plantae : Tracheophyta : Polypodiopsida : Polypodiales : Aspleniaceae : Asplenium : Asplenium haguei72.1 - 66 Ma
Late/Upper Cretaceous
Anemia sp.
genus
6Plantae : Tracheophyta : Polypodiopsida : Schizaeales : Anemiaceae : Anemia66 - 56 Ma
Paleocene

References

Knowlton F. H. Fossil Flora of the Yellowstone National Park, USGS Monograph Series 32 2
Cope E. D. Report on the stratigraphy and Pliocene vertebrate paleontology of northern Colorado, Bulletin of the United States Geological and Geographical Survey of the Territories 1 1, 9-22
Cope E. D. Review of the Vertebrata of the Cretaceous Period found west of the Mississippi River, Bulletin of the United States Geological and Geographical Survey of the Territories, First Series 2, 3-48
Hatcher J. B., Lull R. S. (1905) Two new Ceratopsia from the Laramie of Converse County, Wyoming, The American Journal of Science, series 4 20 120, 413-419
Hatcher J. B., Marsh O. C., et al (1907) The Ceratopsia, Monographs of the United States Geological Survey 49, 1-198
Toepelman W. C. (1926) Notes on the Laramie Formation in central Weld County, Colorado, The Journal of Geology 34 8, 834-835
Brown R. W. (1962) Paleocene flora of the Rocky Mountains and Great Plains, United States Geological Survey Professional Paper 375, 1-119
Carpenter K. (1979) Vertebrate fauna of the Laramie Formation (Maestrichtian), Weld County, Colorado, Contributions to Geology, University of Wyoming 17 1, 37-49
Lockley M. G., Hunt A. P. (1995) Ceratopsid tracks and associated ichnofauna from the Laramie Formation (Upper Cretaceous: Maastrichtian) of Colorado, Journal of Vertebrate Paleontology 15 3, 592-614
Santucci V. L. (1998) The Yellowstone paleontological survey, Yellowstone Center for Resources, National Park Service, YCR-NR 98-1, 1-51
Gardner J. D. (2000) Albanerpetontid amphibians from the Upper Cretaceous (Campanian and Maastrichtian) of North America, Geodiversitas 22 3, 349-388
Carpenter K., Young D. B. (2002) Late Cretaceous dinosaurs from the Denver Basin, Colorado, Rocky Mountain Geology 37 2, 237-254
Hutchison J. H., Holroyd P. A. (2003) Late Cretaceous and early Paleocene turtles of the Denver Basin, Colorado, Rocky Mountain Geology 38 1, 121-142
Lockley M. G., Foster J. R. (2003) Late Cretaceous mammal tracks from North America, Ichnos 10, 269-276 doi:10.1080/10420940390257923
Johnson K. R. (2003) Denver Museum of Nature & Science archival records of Kirk Johnson fieldwork in Cretaceous rocks of the Rocky Mountain region.
Alroy J. (2006) Synonymies and reidentifications of North American fossil vertebrates
Lyson T. R., Joyce W. G. (2009) A revision of Plesiobaena (Testudines: Baenidae) and an assessment of baenid ecology across the K/T boundary, Journal of Paleontology 83 6, 833-853
Wilson G. P., Dechesne M., et al (2010) New latest Cretaceous mammals from northeastern Colorado with biochronologic and biogeographic implications, Journal of Vertebrate Paleontology 30 2, 499-520
Longrich N. R., Bhullar B.-A. S., et al (2012) Mass extinction of lizards and snakes at the Cretaceous–Paleogene boundary, Proceedings of the National Academy of Sciences 109 52, 21396-21401 doi:10.1073/pnas.1211526110
Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!
 
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