William J. Breed
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William J. "Bill" Breed was an American geologist, paleontologist, naturalist and author in Northern Arizona. He was a renowned expert on the geology of the Grand Canyon.
Breed Image 2003
Edwin H. Colbert
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Edwin Harris "Ned" Colbert was a distinguished American vertebrate paleontologist and prolific researcher and author.
William J. Breed
…Breed was Curator of Geology (1960–78), Head, Geology Department (1978–81) at the Museum of Northern Arizona in Flagstaff, Arizona. In 1969, Breed and Edwin H. Colbert were two of the four vertebrate paleontologists in Antarctica who helped solidify the acceptance of continental drift theory, by finding a 220-million-year-old…
Colbert in the 1960s
A dinosaur family tree from Colbert's The Dinosaur Book: The Ruling Reptiles and their Relatives (1945).