GEOLOGIC UTAH’S MESOZOIC TIME SCALE ROCK RECORD Southern Tyrannosaurus Torosaurus & Alamosaurus fauna Tyrannosaurus Alamosaurus ankylosaurid teeth long-horned 65 NORTH HORN FORMATION centrosaurines Maastrichtian Ornithomimus new chasmosaurines Hagryphus DINOSAUR Highest diversity North America ceratopsid & KAIPAROWITS FORMATION hadrosaurid fauna Gryposaurus Edmontonia EXTINCTION 75 Campanian new tyrannosaurids Parasaurolophus new tyrannosaurid First centrosaurines Diabloceratops WAHWEAP FORMATION - MASUK FORMATION & hadrosaurids new hadrosaurine pachycephalosaurs nodosaurids Santonian Upper STRAIGHT CLIFFS FORMATION Diverse tooth fauna Blue Gate Member MANCOS SHALE First ceratopsomorphs Coniacian Zuniceratops advanced nodosaurid National Monument Ferron Sandstone - Smoky Hollow Member Nothronychus hadrosauromorphs teeth Turonian Local extinction Pachycephalosaurid TROPIC SHALE. - Tununk Member MANCOS SHALE of sauropods Grand Sraircase - Escalante teeth ornithomimid DAKOTA FORMATION Asian immigration tiny Cenomanian ornithopod Eolambia Mussentuchit Member induced extinction tyrannosaurid and origin of North teeth tiny pleurocoelid 100 troodontid teeth American Late neoceratopsian teeth Animantarx brachiosaurid teeth Cretaceous dinosaur Albian fauna Ruby Ranch Cedarpelta Member Isolation of North Tennontosaurus nodosaurids America resulting Abydosaurus in local extinctions pleurocoelid Deinonychus and increased Acrocanthosaurus brachiosaurids
Aptian FORMATION endemism Nedcolbertia new camarasaurid Poison Strip Sandstone Dinosaurs
CRETACEOUS new titanosaurid CEDAR MOUNTAIN CEDAR MOUNTAIN with European Gastonia Yellow Cat affinities Member Planicoxa & new
125 Buckhorn Conglomerate Barremian Dakotadon ? hypsilophodontid Utahraptor Cedarosaurus New lowest new carnosaurid major time gaps Cretaceous new FLOWERS ? new large troodontid faunal level ORIGIN OF in stratigraphic polacanthine ankylosaur new new Neocomian record in white hiatus Falcarius sauropods iguanodont Allosaurus Dryosaurus central eastern Ceratosaurus Camptosaurus Utah Utah Widely-known Torvosaurus Tithonian Jurassic dino- Brachiosaurus 150 saur faunas Camarasaurus Kimmeridgian MORRISON FORMATION Marshosaurus & Stokesosaurus Haplocanthosaurus
Oxfordian San Rafael Swell - Arches National Park Diplodocus CURTIS - SUMMERVILLE FORMATION Stegosaurus Apatosaurus
Callovian Cleveland Lloyd Quarry
Bathonian ENTRADA SANDSTONE Dinosaur National Monument Bajocian CARMEL FORMATION Megalosaur (Megalosaurophus tracks) Aalenian PAGE SANDSTONE 175 Sauropod (Parabrontosaurophus tracks) Toarcian Many horizons NAVAJO SANDSTONE with dinosaur JURASSIC tracks Pliensbachian Megapnosaurus (Grallator tracks)
KAYENTA FORMATION Seitaad & Dilophosaurus (Eubrontes tracks) Sinemurian ( Otozoum tracks)
Hettangian MOENAVE FORMATION - WINGATE SANDSTONE 200 Rhaetian Megapnosaurus Dilophosaurus ?
MILLIONS OF YEARS AGO Norian
Dinosaur Discovery Site
FORMATION / GROUP Southern Utah - St. George CHINLE First North
American dinosaurs Coelophysis
Upper
Carnian 225
Ladnian hiatus FIRST
TRIASSIC
DINOSAUR Anisian Non-dinosaurian tracks Olenekian MOENKOPI FORMATION 250 Induan PERMIAN hiatus