First Edition/First Printing 1986. A beautiful and fine copy in a near fine unclipped dustjacket--with only the lightest of rubbing to the dustjacket---signed by McPhee on the title page. This is a review copy with review bookmark about the author and book laid in. This is McPhee's third volume in his great series of books on American Geology--which he called "The Annals of the Former World". A very nice book in brown cloth with gilt lettering to the spine. Pastedowns and endpapers are geologic timelines. There is also a Tom Funk map of The Bighorn and Powder River Basins. McPhee is the prolific Pulitzer Prize winning author of dozens of books and a writer for the New Yorker magazine.