Skip to main content
Go to accessibility notice

    Description

    LARGE MASS MORTALITY ORTHOCERAS SLAB
    Orthoceras sp.
    Ordovician
    Sahara Desert, near Talmud, Morocco

    A study in black and white, this mass mortality plate of fossil cephalopods (Orthoceras sp.) shows that there were millions of these sea dwelling creatures in what was once the Sahara Seas (now known as the Sahara Desert). The individual specimens have been sculpted out of the matrix using hand tools and painstakingly polished, creating a three dimensional effect. Their shell remnants have all been oriented in the same direction by the rhythmic motions of the crashing waves, and fossilized over the eons. This dynamic fossil plaque shows the huge variation in size of these ancient relatives of the squid and chambered nautilus: some are a mere few inches long while the longest specimen is over two feet in length at 25 1/2 inches.
    Overall dimensions are 55 1/2 x 43 inches and it is approximately 5 inches thick. In fine condition.


    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
    October, 2013
    19th-20th Saturday-Sunday
    Bids + Registered Phone Bidders: 5
    Lot Tracking Activity: N/A
    Page Views: 1,679

    Buyer's Premium per Lot:
    25% on the first $100,000 (minimum $14), plus 20% of any amount between $100,000 and $1,000,000, plus 12% of any amount over $1,000,000 per lot.

    Sold for: Sign-in or Join (free & quick)

    Heritage membership

    Join Now - It's Free

    VIEW BENEFITS
    1. Past Auction Values (prices, photos, full descriptions, etc.)
    2. Bid online
    3. Free Collector newsletter
    4. Want List with instant e-mail notifications
    5. Reduced auction commissions when you resell your
      winnings 
    Consign now
    • Cash Advances
    • More Bidders
    • Trusted Experts
    • Over 200,000 Satisfied Consignors Since 1976
    Only 21 days left to consign to the 2020 July 1 American Art Signature Auction - Dallas!

    Learn about consigning with us

    You have done a terrific job!  I am so pleased.  Thank you for your professionalism, it's been a complete pleasure dealing with you. 
    Merti, W.,
    San Francisco, CA
    View More Testimonials

    HA.com receives more traffic than any other auction house website. (Source: Similarweb.com)

    Video tutorial

    Getting the most out of search