Lot 6
Prehistoric Marine, Mosasaur, Late Cretaceous period, ca. 70 to 66 million years ago. A dramatic remnant of an ancient ocean predator, this fossilized vertebral series captures a section of a mosasaur spine preserved within its original sedimentary matrix. The specimen is presented in two adjoining segments, each retaining multiple articulated vertebrae, their rounded centra and projecting processes emerging in relief from the surrounding stone. The bone surfaces display a pale, mineralized tone that contrasts subtly with the sandy matrix, allowing the structure of the vertebrae to remain clearly legible. Individual elements vary in preservation, with some exhibiting more pronounced articulation, while others are partially embedded, suggesting the natural compression and geological forces that shaped the fossil over millions of years. Size of larger piece: 11.1" L x 5.6" W x 3" H (28.2 cm x 14.2 cm x 7.6 cm); together: 19.3" L x 6.5" W x 3.5" H (49 cm x 16.5 cm x 8.9 cm)
Mosasaur vertebrae are distinguished by their spool-shaped centra and robust construction, adapted to support powerful lateral movement through water. These marine reptiles, among the dominant predators of the Late Cretaceous seas, relied on strong, undulating bodies to pursue fish, ammonites, and other marine life. The preserved alignment seen here offers insight into that locomotion, hinting at the fluid, serpentine motion that once propelled the animal through prehistoric oceans.
Retained in matrix, the fossil emphasizes both the skeletal structure and the geological context of its discovery, presenting not only the remains of the animal but also a fragment of the ancient seabed in which it was entombed. The division into two sections likely reflects either natural fracturing or careful extraction, allowing for a more complete view of the vertebral sequence. This specimen serves as a tangible record of Cretaceous marine life, combining scientific interest with strong visual presence, ideal for both study and display.
Provenance: private Colorado, USA collection
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#197995
- Condition: Split into two pieces. Professionally presented in matrix. Rich earthen deposits and encrustations throughout.
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