Book Cliffs

[1] They are so named because the cliffs of Cretaceous sandstone capping many of the south-facing buttes appear similar to a shelf of books.

In the 1980s, Exxon scientists used the Cretaceous strata of the Book Cliffs to develop the science of sequence stratigraphy.

The Book Cliffs have preserved excellent strata of the foreland basin of the ancient Western Interior Seaway that stretched north from the Gulf of Mexico to the Yukon in the Cretaceous Period.

Large mammals found in the Book Cliffs include coyotes, mountain lions, bobcats, mule deer, elk, black bears, pronghorn, American bison as an extension of the Henry Mountains bison herd and bighorn sheep.

[3] The new group joined 14 animals previously released in August 2008 from a private herd on the nearby Uintah and Ouray Indian Reservation.

The Spring Canyon sandstones in the Book Cliffs above Helper, Utah , with several sedimentary cycles visible in the cliffs
Book Cliffs and Mt. Garfield (on right, approximate altitude 6,600 ft or 2,000 m) in Mesa County, Colorado
The Book Cliffs near Green River, Utah, ca. 1879–1894. Photographs of the American West, Boston Public Library
The Book Cliff in Helper, Utah
A flute cast , one of many sedimentary structures found in the Book Cliffs