← Geological formations

Lance

292 occ. 58 taxa (19 genera) 1 countries
Description

The Lance (Creek) Formation is a division of Late Cretaceous rocks in the western United States. Named after Lance Creek, Wyoming, the microvertebrate fossils and dinosaurs represent important components of the latest Mesozoic vertebrate faunas. The Lance Formation is Late Maastrichtian in age, and shares much fauna with the Hell Creek Formation of Montana and North Dakota, the Frenchman Formation of southwest Saskatchewan, and the lower part of the Scollard Formation of Alberta.

Genera
19 genera
Triceratops
Triceratops
Dinosaurs
Valid 37 occ. · 84 Ma
Edmontosaurus
Edmontosaurus
Dinosaurs
Valid 17 occ. · 90 Ma
Paronychodon
Paronychodon
Dinosaurs
Valid 11 occ. · 155 Ma
Ornithomimus
Ornithomimus
Dinosaurs
Valid 8 occ. · 84 Ma
Richardoestesia
Richardoestesia
Dinosaurs
Valid 6 occ. · 155 Ma
Dryptosaurus
Dryptosaurus
Dinosaurs
Valid 6 occ. · 113 Ma
Thescelosaurus
Thescelosaurus
Dinosaurs
Valid 6 occ. · 94 Ma
Pachycephalosaurus
Pachycephalosaurus
Dinosaurs
Valid 3 occ. · 84 Ma
Troodon
Troodon
Dinosaurs
Valid 3 occ. · 84 Ma
Tyrannosaurus
Tyrannosaurus
Dinosaurs
Valid 2 occ. · 84 Ma
Dromaeosaurus
Dromaeosaurus
Dinosaurs
Valid 2 occ. · 110 Ma
Struthiomimus
Struthiomimus
Dinosaurs
Valid 1 occ. · 84 Ma
Nanotyrannus
Nanotyrannus
Dinosaurs
Valid 1 occ. · 72 Ma
Saurornithoides
Saurornithoides
Dinosaurs
Valid 1 occ. · 101 Ma
Hadrosauropodus
Hadrosauropodus
Dinosaurs
Valid Ichnogenus Formal taxon 1 occ. · 121 Ma
Zapsalis
Zapsalis
Dinosaurs
Valid 1 occ. · 86 Ma
Nodosaurus
Nodosaurus
Dinosaurs
Valid 1 occ. · 101 Ma
Acheroraptor
Acheroraptor
Dinosaurs
Valid 1 occ. · 72 Ma
Albertosaurus
Albertosaurus
Dinosaurs
Valid 1 occ. · 86 Ma
News 1
Peloroplites: Beast of the Week
Peloroplites: Beast of the Week
 This week we will be checking out a large tank dinosaur.  Enter Peloroplites cedrimontanus!Peloroplites was a plant-eating dinosaur that lived in what is now Utah, USA, during the Cretaceous period, between 98 and 93 million years ago.  From snout to tail it would have measured about 20 feet (6m) long.  It's genus name translates to "Giant Hoplite" in reference to hoplites, the ancient Greek soldiers who famously carried spears and large shields.  The species name translates to "Cedar Mountain"
19/04/2026 prehistoricbeastoftheweek
Lance
click to enlarge
Lance Formation along Cow Creek, Niobrara County, Wyoming © Anky-man · CC BY-SA 3.0 · Wikipedia
Temporal range
Triassic
Jurassic
Cretaceous
Paleogene
Neogene
252 201 145 66 0 Ma
Geological group / Member
Torrington 7
Montana 4
Chiule 3
Top countries
🇺🇸 United States 292
Depositional environments
Terrestrial indet. 239
Fluvial indet. 20
Floodplain 14
Channel lag 8
Channel 6
Fluvial-lacustrine indet. 2
Delta plain 2
Estuary / bay 1
Top collectors
J. B. Hatcher 61
W. A. Clemens 53
K. Derstler 17
SWAU 15
D. Winchester 12
C. Hares 12
E. Lloyd 12
E. Parks 12
J. L. Kay 9
E. M. Schlaikjer 7
B. Brown 6
P. Reinheimer 5
Collection activity by decade
1860s 2
1870s 1
1880s 24
1890s 37
1900s 26
1910s 33
1920s 8
1930s 25
1940s 2
1950s 10
1970s 1
1980s 14
1990s 44
2000s 3
2010s 15