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    Description

    Ammonite Fossil
    Sphenodiscus splendens
    Late Cretaceous
    Timber Lake Member, Fox Hills Formation
    South Dakota, USA


    This Sphenodiscus is an Ammonite from the vaunted Fox Hills Formation and showcases incredible red and green reflecting off its smooth surface. A broad band of peripheral 'fill' is visible on the outermost edge of the fossilized shell, and the complex face features areas with diagnostic suture lines, as well as an iridescence including flashes of an opalescent purple color. The shell measures over 12 inches (30.5 cm) in diameter and exhibits some preserved nacre and other colorful, iridescent patches on the back. Some sedimentary matrix is attached to the reverse of the fossil that is, otherwise, a freestone variety. The example was prepped by Neal Larson and was collected with permission from a Dakota gravel pit.
    Overall Measurements: 12.20 x 10.24 x 2.87 inches (31.00 x 26.00 x 7.28 cm)

    Provenance: The Property from an East Coast Collection

    [Scale: 1 inch, with mark at 1 cm]


    Condition Report*: Condition report available upon request.
    *Heritage Auctions strives to provide as much information as possible but encourages in-person inspection by bidders. Statements regarding the condition of objects are only for general guidance and should not be relied upon as complete statements of fact, and do not constitute a representation, warranty or assumption of liability by Heritage. Some condition issues may not be noted in the condition report but are apparent in the provided photos which are considered part of the condition report. Please note that we do not de-frame lots estimated at $1,000 or less and may not be able to provide additional details for lots valued under $500. All lots are sold "AS IS" under the Terms & Conditions of Auction.

    Auction Info

    Auction Dates
    September, 2019
    28th Saturday
    Bids + Registered Phone Bidders: 2
    Lot Tracking Activity: N/A
    Page Views: 454

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