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