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Also depicted on the chart are the Cambrian “explosion” of animal phyla and the juxtaposition of reptiles and mammals across the Cretaceous/Tertiary (K/T) boundary
Authors: Duwain Whitis and Barbara Vinson
and biological resources of the Monument by an impressive array of writers
Evans & Belknap
Book - This Is Dinosaur: Echo Park Country and Its Magic Rivers F park informationThis Is Dinosaur was first published in 1955, in the midst of a bitter controversy over the proposed construction of dams at Echo Park. The outcome of the controversy a congressional vote to prohibit the dams "set in brass the principle that any part of the national park system should be immune from any sort of intrusion and damage," wrote Wallace Stegner in the 1985 edition of the book. Reprinted with new color photographs, This Is Dinosaur still
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