What people are saying - Write a review
We haven't found any reviews in the usual places.
The Great Trough
The Geography of a Vanished World
9 other sections not shown
abundant ancient sediments Ankylosaurus areas Baculites badlands bald-cypress Black Hills body bones broad-leaved trees buried Canadian carnivores channels Chasmosaurus climate coal coastal plain collected Corythosaurus creatures Cretaceous cycads cypress deltaic dino Dinosaur Provincial Park dinosaurian Dromaeosaurus Dromiceiomimus Drumheller duckbilled duckbilled dinosaurs earth edge environments extinctions Fairchild Garden feet ferns floodplain floor formed Forty-ninth Parallel fossil pollen Geological Survey giant horned dinosaur Horseshoe Canyon Formation indicate inhabited interior sea land layer leaves levees living lizards Louisiana mammals ments miles million years ago Montana mountains mudstones National Museum North America numbers occur Oldman Formation ostrich dinosaurs oxbow lakes prairie probably Red Deer River redwoods region remains reptiles river sands Rockies Saskatchewan saurs saurus sedi sedimentary sediments sediments deposited shallow shells skeletons skull smaller southern Alberta specimens surface Survey of Canada swamp tiny tion Triceratops trough tupelo tyrannosaurs valley walls varieties western Canada western interior wetland wood