Check the listing for details. Knightia eocaena Fossil Fish - Green River Fm. - Split Fish Layer - WY. Condition: Used. Listed at 20.99 USD. Species: Knightia eocaena Formation: Green River Formation Locality: Kemmerer, Wyoming Age: Eocene, 53.5-48.5 million years old A plate from the Split Fish Layer containing a Knightia eocaena fish fossil and another partial fish, probably another Knightia, from the Green River Formation in Kemmerer, Wyoming. We do combine domestic shipping! Shipping cost is built into many of our items that have free shipping, so if you order multiple items at once, we will refund the difference! If you are an international buyer, please either buy all of your items at the same time in the same order, or message us so we can combine the listing. If you buy them separately, the eBay Global Shipping Program will not allow us to combine the shipping.