A Closer Look at John Day Fossil Beds National Monument : Discover Your Northwest : 9780914019787 : 0914019783 : 01 Jun 2017 : Hidden among the sagebrush dotted hills of eastern Oregon is one of the world's premiere fossil sites. Once inhabited by tiny horses, massive brontotheres, and 'terminator-pig' entelodonts, the John Day River basin is now home to the Northwest's most colorful badlands and holds unparalleled paleontological evidence in its rock layers. The John Day Fossil Beds National Monument preserves a singular and extraordinary record of evolutionary and climactic change spanning almost 50 million years of the Age of Mammals. A Closer Look at John Day Fossil Beds National Monument expands on themes from the displays and exhibits at the monument's Thomas Condon Paleontology Center. Readers can explore the region's dramatic changes over time in a journey through the rock layers in this compact and visually compelling story delivered in an engaging style by author and Park Ra