This is a really cool clock made out of a slab of shale containing a nicely preserved, 4.5" long Cockerellites (Priscacara) liops fossil fish. The fish in their natural position in an unbroken slab of shale which has been shaped, backed with wood for hanging and had a working clock mechanism installed.
were quarried from the Eocene aged (45-50 million year old) Green River Formation near Kemmerer, Wyoming.
50 million years ago, in the Eocene these fish thrived in Fossil Lake fed by Uinta and Rocky Mtn. highlands. The anoxic conditions at the bottom of Fossil Lake slowed bacterial decomposition, prevented scavengers from disturbing corpses, and most interestingly, suffocated creatures that ventured into the oxygen-starved aquatic layer. The result is a miraculous exhibition of Eocene biota in a subtropical, aquatic community within sycamore forests teeming with creatures such as freshwater stingrays, dog-sized horses, menacing alligators, early flying bats, and one of the first primates.