Dinosaurs under the Aurora

Color Plate Insert

Plate 1. Map of Arctic boundaries showing various geographic and ecologic definitions of the Arctic. Credit: AMAP and CAFF. Plate 3. Fragment of Edmontosaurus limb bone from Liscomb Bone Bed showing mineralization and internal architecture. Zeolite crystals, and nodular masses of francolite, and siderite are visible at left end. Dark brown bone matrix contains francolite, calcite, limonite siderite, and pyrite. Credit: Roland Gangloff. Plate 4. Don Lofgren flanked by recent slides, as he stands on a bone bed just downstream from the Liscomb Bone Bed, 1992. Note white volcanic ash bed that lies above the bone bed. Credit: Roland Gangloff. Plate 2. Facing. Edmontosaurus mother and child under the aurora borealis on North Slope, Alaska. Credit: Karen Carr and Gerald and Buff Corsi/Focus on Nature, Inc. Plate 5. Aerial view of Umiat surrounded by thaw lakes and expanses of tundra in blazing fall colors with airstrip and support buildings near center and Colville River to the north and east. Credit: Rick Reanier. Plate 6. Artist’s reconstruction of mid-Cretaceous (Albian to Cenomanian) dinosaur assemblage and environment represented by trackways and other fossils near Ross River, Yukon Territory, Canada. In the foreground, two ankylosaurids face a large tyrannosaurid while smaller theropods and ornithopods hunt and forage, in and along, the river’s edge. Credit: George Teichmann and Yukon Heritage Resources. Plate 7. Facing. Artist’s reconstruction of Late Cretaceous (circa seventy-five million years ago) dinosaur assemblage and environment from the North Slope of Alaska. Foreground from left to right: Pachyrhinosaurus and small thescelosaurs, head of large tyrannosaur (possibly Albertosaurus), Dromaeosaurus, and a saurornitholestid. Background from left to right: Edmontosaurus, Troodon chasing a young Edmontosaurus with a pachycephalosaur far to the rear. Credit: Karen Carr. Plate 8. Map of present and potential oil, gas, and coal development in the circumarctic. Credit: AMAP and CAFF. Plate 9. Fly in amber from Baltic coast (twenty-three to thirty-three million years old).Credit: anonymous (enlarged and cropped by the author). ...