🇺🇸 United States

Genera found in this country (188)

188 genres

Grallator

250 Ma

Dinosaurs Ichnogenus 119 occ.

Camarasaurus

162 Ma

Dinosaurs Valid 104 occ.

Allosaurus

162 Ma

Dinosaurs Valid 98 occ.

Triceratops

84 Ma

Dinosaurs Valid 95 occ.

Paronychodon

155 Ma

Dinosaurs Valid 69 occ.

Stegosaurus

162 Ma

Dinosaurs Valid 66 occ.

Tyrannosaurus rex Scavenged Duck-Billed Dinosaurs in Ancient Wyoming, Bite Marks Reveal

behavior bone Canardia Cretaceous Dinosauria +5

Thousands of fossilized bones from a Cretaceous-period bonebed in Wyoming, the United States, offer rare physical evidence that Tyrannosaurus rex fed on the carcasses of a duck-billed dinosaur species called Edmontosaurus annectens. The post Tyrannosaurus rex Scavenged Duck-Billed Dinosaurs in Ancient Wyoming, Bite Marks Reveal appeared first on Sci.News: Breaking Science News.

16/07/2026 sci-news

Giant lava fountains filmed live: this Hawaiian volcano has already had 50 eruptive episodes in 18 months!

geology United States volcanism

Since the start of this eruption, on December 23, 2024, the activity has been episodic: pauses of one to three weeks separate phases of sustained activity of a few hours inside the summit caldera of the volcano. Fifty episodes followed one another in a year and a half,...

30/06/2026 futura-terre ⚙ traduction auto

Early Saber-Toothed Cat Gets New Face after Decades of Mystery

mammals paleoart Pliocene reconstitution skull +2

A nearly complete skull unearthed decades ago in Arizona has given paleontologists their clearest look yet at Adelphailurus kansensis, an enigmatic felid species that inhabited North America more than 5 million years ago and occupied an early branch of the saber-toothed cat family tree. The post Early Saber-Toothed Cat Gets New Face after Decades of Mystery appeared first on Sci.News: Breaking Science News.

29/06/2026 sci-news

Sauroposeidon: Beast of the Week

Cretaceous Dinosauria Early Cretaceous Sauroposeidon United States

 This week we will be checking out a huge dinosaur with an equally impressive name.  Enter Sauroposeidon proteles!Sauroposeidon was a sauropod dinosaur (long neck) that lived in what is now Oklahoma, Texas, and Wyoming, USA, during the early Cretaceous period, about 113 million years ago.  Its genus name translates to "Lizard Earthquake God" after the Greek god, Poseidon, who in addition to his more famous association with the ocean, was also the god of earthquakes in Greek mythology. Since not

14/06/2026 prehistoricbeastoftheweek

The 1,100-year-old mystery of Montana’s lost bison hunting site finally solved

Homo sapiens hunting mammals United States

For nearly 700 years, Indigenous hunters repeatedly used a bison kill site in central Montana—then suddenly stopped, even though bison were still abundant. Researchers uncovered evidence that recurring, decades-long droughts likely made the site less practical by reducing access to the water needed to process large numbers of animals. At the same time, hunting groups were shifting toward larger, more coordinated operations that required dependable resources and specialized locations.

11/06/2026 sciencedaily-fossils

Researchers have discovered enough lithium under these mountains to make 500 billion cell phones!

discovery United States

A vast discovery of lithium in Appalachia could reshuffle the cards for American supplies. At a time when demand is exploding, this strategic deposit revives the hope of greater independence for the United States from imports.

22/05/2026 futura-terre ⚙ traduction auto

New Triassic Carnivorous Dinosaur Identified from Ghost Ranch

Coelophysis Dinosauria fossil Late Triassic new species +5

Researchers from Virginia Tech (Virginia, USA) have identified a new species of Late Triassic dinosaur.  The dinosaur has been named Ptychotherates bucculentus.  This new carnivorous dinosaur taxon has been erected based on the detailed examination of an incomplete, well-preserved but jumbled up skull fossil (specimen number CM 31368).  The skull comes from the world-famous Coelophysis

11/05/2026 everythingdinosaur

Peloroplites: Beast of the Week

Cedar Mountain Cretaceous Dinosauria Lance Peloroplites +1

 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

New Triassic Dinosaur Species Identified in New Mexico

Dinosauria Mexico new species skull Triassic +1

A new genus and species of carnivorous herrerasaurian dinosaur has been described from an incomplete but well-preserved skull found in northern New Mexico, the United States. The post New Triassic Dinosaur Species Identified in New Mexico appeared first on Sci.News: Breaking Science News.

17/04/2026 sci-news

This 31-foot “terror croc” ate dinosaurs. Now it’s back

Dinosauria museum predator skeleton United States

A massive, bus-sized “terror croc” that once preyed on dinosaurs has been brought back to life in stunning detail with the first scientifically accurate full skeleton of Deinosuchus schwimmeri. Stretching over 30 feet long, this ancient apex predator ruled the southeastern U.S. more than 75 million years ago—and now visitors can see it up close at the Tellus Science Museum, the only place in the world with this replica.

15/04/2026 sciencedaily

Daemonosaurus: Beast of the Week

Daemonosaurus Dinosauria Late Triassic Mexico skull +2

 This week we will be checking out a unique looking early dinosaur with a very cool name.  Meet Daemonosaurus chaoliodus!Daemonosaurus was a small meat-eating dinosaur that lived in what is now New Mexico, United States, during the late Triassic period, roughly between 205 and 200 million years ago.  From nose to tail it is estimated to have measured roughly 5 to 7 feet (1.5-2.2m).  These are estimates based on the fact that only the skull and neck were found.  The genus name translates to "Demo

05/04/2026 prehistoricbeastoftheweek

Elasmosaurus: Beast of the Week

Cretaceous Elasmosaurus Late Cretaceous United States

 This week we will be checking out a sea beast who's proportions were so outrageous, it confused even scientists! Check out Elasmosaurus platyurus.Elasmosaurus was a large reptile that lived in he sea that covered what is now central part of the United States during the late Cretaceous period, between 80 and 77 million years ago.  From snout to tail it would have measured about 34 feet (7.1m) and would have eaten meat when alive.  Its genus name translates to "plate reptile" in reference to how

29/03/2026 prehistoricbeastoftheweek

Eubrontes

Dinosauria Eubrontes Jinlijingpus

Camarasaurus

Camarasauridae Camarasaurinae Camarasaurus

Spheroolithus

China Dinosauria fossil

Caririchnium

bone Caririchnium Cretaceous

Coelophysis

Chinle Coelophysidae Coelophysinae

Shastasaurus

Euichthyosauria Late Triassic Merriamosauria

Halisaurus

Dinosauria Halisaurus United States

Otozoum

Dinosauria Otozoum Portland

Magnoavipes

bone Caririchnium Cretaceous

Dendroolithus

China Dendroolithidae Dendroolithus

Anchisaurus

Ammosaurus Anchisauria Anchisauridae

Stokesosaurus

formation Jurassic Late Jurassic

Compsognathus

Compsognathia Compsognathinae United States

Montanoceratops

bone Ceratopsia Cretaceous

Scaphognathus

cast Dinosauria flight

Achelousaurus

Achelousaurus Centrosaurinae Ceratopsidae

Falcarius

Falcarius museum skeleton

Khaan

fossil holotype Khaan

Uktenadactylus

Albian Anhangueridae Pterosauria

museum Thescelosaurus United States

museum skeleton Thescelosaurus

Barremian Berriasian description

Anhanguera museum skeleton

museum Plotosaurus skeleton

Formations géologiques (30)

Morrison 1191 Hell Creek 738 Portland 302 Lance 292 Fruitland/Kirtland 258 Kirtland 224 Cloverly 223 Aguja 216 Cedar Mountain 209 Two Medicine 199 Judith River 161 Kayenta 121 Ferris 120 Chinle 111 Niobrara 111 Glen Rose Limestone 94 Ojo Alamo 93 Navajo Sandstone 86 Fruitland 81 Pierre Shale 73 East Berlin 63 Kaiparowits 54 Denver 52 Passaic 52 Turners Falls 52 Wayan 51 Javelina 49 Arundel Clay 47 North Horn 42 Oldman 1

Plage temporelle

Groupe géologique · Membre

Montana 675

Glen Canyon 313

Agawam 304

Dakota 265

Trinity 171

Colorado 145

Meriden 134

Chatham 87

Mesaverde 78

Monmouth 71

Potomac 71

Selma 52

Brushy Basin 395

Upper 162

Flag Butte 144

Alto Shale 128

Himes 125

Naashoibito 118

Lake Como 110

Mussentuchit 91

Smoky Hill Chalk 91

Silty Facies 76

Little Sheep Mudstone 76

De-na-zin 70

Environnements de dépôt

Principaux collecteurs

Activité de collecte par décennie