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Ammonite Fossil Mass Mortality Cluster. Indosphinctes sp.. Middle Jurassic. Russia...
Description
Ammonite Fossil Mass Mortality ClusterIndosphinctes sp.
Middle Jurassic
Russia
This striking fossil assemblage captures a dramatic moment frozen in time-a mass mortality event featuring over a dozen Indosphinctes Ammonites, preserved together in a single matrix. Varying in size and orientation, the Ammonites exhibit lustrous pearlescent and iridescent surfaces, highlighting fine shell detail and natural color play across the fossilized exoskeletons. The largest Ammonite in the cluster measures an impressive 7 inches (18 cm) in diameter, making this a visually dynamic and scientifically compelling specimen. Such groupings provide rare insights into paleoecological conditions and are highly sought after for both their aesthetic beauty and paleontological importance.
Overall Measurements: 13.00 x 10.00 x 5.50 inches (33.02 x 25.40 x 13.97 cm)
Provenance: Property of a Distinguished Southern California Collector
More Information: All items are offered "as is." While every effort has been made to accurately describe each lot, certain pieces—particularly fossils, minerals, and carvings—may exhibit minor imperfections, repairs, restorations, or natural wear consistent with age, excavation, or handling. Prospective buyers are encouraged to carefully review photographs and descriptions and to request additional condition information prior to bidding.
Estimate: $1,200 - up.
Auction Info
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25% of the successful bid (minimum $49) per lot.
This lot is in: 2 -
Signature® Internet Session - No Floor or Phone Bidding (Mail, Fax, Internet, and Heritage Live):
(Lots 72188-72346) - 4:00 PM Central Time, Tuesday, December 2, 2025.
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Heritage Auctions
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Dallas, TX 75261
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