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Fossil Bird Feathers Age: Eocene Formation: Green River Formation Location: Bonanza, Utah Size: Feather on left is about 0.5 inches long This specimen is not for sale Click here for similar specimens that are for sale
This is an excellent set of fossil bird feathers from the Eocene of Colorado. Bird remains are quite rare in the fossil record - even solitary feathers are very uncommon. The feather on the left is long and thin, probably a wing feather. But the feathers on the right are quite unusual. This looks like a tuft of down feathers. This grouping is extremely rare, because fossil feathers are usually found as single occurences. These fine down feathers exhibit extraordinary detail - the individual filiments are very apparent. The fossils have excellent dark-brown color and contrasts beautifully with the khaki-colored matrix. Both sets of feathers are almost perfectly centered on the squared plate of shale. This is a very collectible specimen of an extremely scarce multiple occurence of fossil feathers from the Green River Formation.