Small Cabinet, 7.0 x 6.0 x 4.0 cm
Green River Formation, Sweetwater Co., Wyoming (TYPE LOCALITY)
Ex. Philadelphia Academy of Natural Sciences
And you thought the Green River sandstone beds only produced fish and palm fossils, eh? Well, I did. I personally never realized that the TYPE LOCALITY for this rare sodium/calcium carbonate was in Wyoming, before now. This specimen is exceptionally rich with gemmy shortite crystals embedded in the sandstone, to 1 cm in size. This is rather large for the species, and for specimens from this locality if what I see on MINDAT is any indication. This specimen is one of two, which fit together and are thus descended from the same sample. It will come with a photocopy of the original label that came with both.