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Rare iridescent baculites fossil ammonite – baculites compressus, santonian, cretaceous, south dakota, usa – genuine specimen with coa
Rare iridescent baculites fossil ammonite – baculites compressus, santonian, cretaceous, south dakota, usa – genuine specimen with coa - Image 2
Rare iridescent baculites fossil ammonite – baculites compressus, santonian, cretaceous, south dakota, usa – genuine specimen with coa - Image 3

Rare iridescent baculites fossil ammonite – baculites compressus, santonian, cretaceous, south dakota, usa – genuine specimen with coa

Original price was: £132.00.Current price is: £105.60.

This is a rare and stunning iridescent Baculites compressus ammonite fossil from the Santonian stage of the Late Cretaceous period (~86-83 million years ago), discovered in South Dakota, USA. Baculites were a genus of straight-shelled ammonites, an extinct group of marine cephalopods related to modern squid and cuttlefish. Unlike the more commonly coiled ammonites, Baculites evolved a long, uncoiled shell, making them well-adapted for different marine environments.

This specimen is highly prized for its remarkable natural iridescence, a result of the original nacreous shell layers reflecting light in stunning colors. The exceptional preservation of this ammonite makes it a valuable addition to any fossil collection.

Geological Information:

  • Formation: Upper Cretaceous Marine Deposits
  • Stage: Santonian (~86-83 million years old)
  • Location: South Dakota, USA
  • Depositional Environment: Shallow marine seafloor with fine sediment deposition

Fossil Characteristics:

  • Elongated, straight shell with visible suture patterns
  • Exceptional iridescent nacreous shell preservation
  • Rare Late Cretaceous specimen from the USA
  • Highly collectible due to its scientific and aesthetic significance

Key Features:

  • Authentic Baculites compressus fossil ammonite
  • Rare iridescent preservation of the original shell structure
  • From the Alice Purnell Collection
  • 100% genuine specimen with Certificate of Authenticity

Scale Rule / Cube = 1cm – Please see photos for accurate sizing.

All fossils are securely packaged for worldwide shipping.

(Actual as seen)

Only 1 left in stock

SKU: AF0523 Category:

Description

This is a rare and stunning iridescent Baculites compressus ammonite fossil from the Santonian stage of the Late Cretaceous period (~86-83 million years ago), discovered in South Dakota, USA. Baculites were a genus of straight-shelled ammonites, an extinct group of marine cephalopods related to modern squid and cuttlefish. Unlike the more commonly coiled ammonites, Baculites evolved a long, uncoiled shell, making them well-adapted for different marine environments.

This specimen is highly prized for its remarkable natural iridescence, a result of the original nacreous shell layers reflecting light in stunning colors. The exceptional preservation of this ammonite makes it a valuable addition to any fossil collection.

Geological Information:

  • Formation: Upper Cretaceous Marine Deposits
  • Stage: Santonian (~86-83 million years old)
  • Location: South Dakota, USA
  • Depositional Environment: Shallow marine seafloor with fine sediment deposition

Fossil Characteristics:

  • Elongated, straight shell with visible suture patterns
  • Exceptional iridescent nacreous shell preservation
  • Rare Late Cretaceous specimen from the USA
  • Highly collectible due to its scientific and aesthetic significance

Key Features:

  • Authentic Baculites compressus fossil ammonite
  • Rare iridescent preservation of the original shell structure
  • From the Alice Purnell Collection
  • 100% genuine specimen with Certificate of Authenticity

Scale Rule / Cube = 1cm – Please see photos for accurate sizing.

All fossils are securely packaged for worldwide shipping.

Additional information

Weight 0.1 g
Dimensions 10 × 10 × 10 cm
Era

Cretaceous
Origin

USA

Cretaceous Information

The Cretaceous Period (145–66 million years ago) was the final era of the Mesozoic, marked by the dominance of dinosaurs and the rise of flowering plants. It had a warm, greenhouse climate, with high sea levels that created vast shallow inland seas. Marine life flourished, including mosasaurs, ammonites, and rudist reefs, while the land was ruled by iconic dinosaurs like Tyrannosaurus rex, Triceratops, and Spinosaurus. Mammals and birds diversified, and insects thrived. The period ended with the mass extinction event, likely caused by an asteroid impact, wiping out the dinosaurs and paving the way for the rise of mammals in the Cenozoic.

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