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    Asterotrygon maloneyi
    Green River Formation
    Kemmerer, Wyoming

    The famous Green River Formation, which was actually a series of three inter-connected freshwater lakes some 50 million years ago, provides an abundance of fossils and is a major productive collecting site for fossil fish and other more exotic fossils. Some of the least common fossils found there are fossil stingrays, and this is an excellent example of a primitive and relatively rare "fat tail" stingray. Found only in the Fossil Lake deposits of the renowned Green River Formation, Asterotrygon featured the typical stingray shape with a round, flat disk radiating from the head and pectoral fins. It also had a narrow, long tail with really sharp stingers. This particular specimen has four stinger "barbs" on the tail and exhibits excellent preservation. It was expertly prepared as a display piece with the stingray perfectly located on the pristine limestone matrix. This piece also shows an apparent line of fracture going right across the pan of the stingray. This is not a crack but rather a fault line where the layers shifted and caused the fossil to essentially separate vertically but not horizontally. Fortunately, this formation is characterized by the deposition of sediments in very fine layers called "varves" which each represent one year. These very thin layers are quite conducive to finding fossils in the rock and, in this example, resulted in a shift so minor a fossil remained virtually intact. This fossil on this artistic piece is a beautiful golden brown that stands out ideally against the stark creamy tan of the shale matrix in which it is embedded forever. The overall piece measures 15 x 11 inches (38.10 x 27.94 cm). The stingray itself is 8.75 inches (22.23 cm) long; the pan is 4.75 inches (12.07 cm) wide.

    Condition Report*: Condition report available upon request.
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    Auction Info

    Auction Dates
    June, 2013
    2nd Sunday
    Bids + Registered Phone Bidders: 0
    Lot Tracking Activity: N/A
    Page Views: 1,575

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