| The view is roughly north, parked amidst Copper Basin, where some 42 species of fossil plants occur in tuffaceous, lacustrine (lake-deposited) exposures of the upper Eocene Dead Horse Tuff (38 to 39 million years old), which here extends from bottom of photograph to the base of the reddish-brown, 15.5 million year old middle Miocene Jarbidge Rhyolite at skyline. |