The Second Jurassic Dinosaur Rush

The first great North American Dinosaur Rush, begun in 1877 and precipitated by the Marsh-Cope rivalry, was followed by an even greater second Dinosaur Rush, begun just before the turn of the century. The two major principals involved were H. F. Osborn of the American Museum of Natural History in New York and W. J. Holland of the Carnegie Museum in Pittsburgh, but a number of other institutions were also involved, among them the Field Museum in Chicago and parties from the Universities of Wyoming and Kansas. The old Marsh sites at Como Bluff, Wyoming and Garden Park, Colorado were reworked with great success, but many new quarries were also opened, among them, those in the Freezeout Hills and eastern slope of the Big Horn Mountains in Wyoming and the Grand Junction area in Colorado, but most importantly at the two greatest North American Jurassic dinosaur sites: The American Museum Bone Cabin Quarry in Wyoming and the Carnegie Museum Quarry at Dinosaur National Monument in Utah.