From the Book - Third edition.
Northeast Wyoming (including the Black Hills of South Dakota)
Pleasant Valley Road Jasper
Fairburn Agates of Buffalo Gap
Agates East of Rapid City
Agates of the Mineral Hills
Agates and Petrified Wood along Highway 16
Moss Agate Road at Douglas
Tiger Chert near Chalk Mountain
Silicified Wood of Marshall
Green Nodules on Marshall Road
Intrusive Crystals along CR 321
Cedar Rim Chalcedony/Jasper
Water Tank Hill Chalcedony
Miners Delight Amphibolite/Jade
Palm Wood West of Oregon Buttes
Agatized Algae in the Wood Bed
Eden Valley Petrified Wood
Opalized Wood of the Big Sandy
The Blue Forest of Green River
White Mountain Turritella
Selenite South of Rock Springs
Red Agate of Cedar Mountain
Red Agate near Henry's Fork
Brown Turritella of Little America
Gypsum and Calcite South of Lovell
Pegmatite Minerals on 296
Petrified Wood of the North Fork
Petrified Wood of the South Fork
Basalt and Crystal of Carter Mountain
Gros Ventre Banded Chalcedony.