Description
A stunning and RARE 11″ specimen of the ammonite Eopachydiscus marcianus, from the Albian stage of the Lower Cretaceous, discovered in Tarrant County near Fort Worth, Texas, USA. This genus represents a remarkable example of mid-Cretaceous ammonoid evolution, known for its large, ornamented shells.
The photo shows the actual fossil you will receive, complete with a 1cm cube scale for sizing reference. This is a 100% genuine fossil, hand-selected for its scientific integrity and aesthetic appeal, and is accompanied by a Certificate of Authenticity.
Geological & Scientific Information:
- Species: Eopachydiscus marcianus
- Type: Fossil Ammonite (extinct marine cephalopod)
- Size: Approx. 11 inches
- Geological Period: Cretaceous
- Stage: Albian (approx. 113–100.5 million years ago)
- Location Found: Tarrant County, Fort Worth, Texas, USA
- Order: Ammonitida
- Superfamily: Desmoceratoidea
- Family: Pachydiscidae
- Morphological Features: Eopachydiscus is recognised by its large, robust shell, with broad, rounded whorls, prominent ribbing, and gently curved flanks. Ribbing may be straight or slightly flexuous and is often strongest along the ventrolateral shoulder. This specimen highlights classic Albian ornamentation.
- Depositional Environment: Shallow marine carbonate platform or shelf associated with the Western Interior Seaway. Fossils from this region are typically preserved in marl or limestone.
- Scientific Importance: Eopachydiscus marcianus is a key marker species within the Albian of North America and contributes to biostratigraphic dating and environmental reconstructions of the mid-Cretaceous Gulf Coastal Plain.
Additional Notes:
Well-preserved large ammonites from Texas are becoming increasingly rare, and this piece offers excellent scientific and display value. Its size and detail make it a standout in any collection.
Why Buy From Us?
- All fossils are 100% authentic and expertly curated.
- Includes a Certificate of Authenticity.
- The exact fossil shown is what you will receive.
- Ideal for collectors, museums, educators, and fossil enthusiasts.
Add this exceptional 11″ Eopachydiscus marcianus ammonite fossil to your collection and own a significant piece of Albian marine life from the ancient Texas seaway!
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