Description
Available here is a rare and scientifically important Oxytropidoceras powelli ammonite fossil, discovered in the Duck Creek Formation from Spring Creek, Cooke County, Texas, USA. This fossil originates from the Upper Albian Stage of the Cretaceous Period, approximately 105 million years ago.
Every fossil we offer is a 100% genuine specimen and is accompanied by a Certificate of Authenticity. The exact specimen shown in the photos is the one you will receive. Scale cube in image = 1cm. Please refer to photos for precise dimensions.
Geological & Taxonomic Context:
- Fossil Type: Ammonite (extinct marine cephalopod)
- Species: Oxytropidoceras powelli
- Family: Brancoceratidae
- Superfamily: Acanthoceratoidea
- Order: Ammonitida
- Formation: Duck Creek Formation
- Age: Upper Albian, Cretaceous Period
- Location: Spring Creek, Cooke County, Texas, USA
- Depositional Environment: Warm, shallow marine shelf (Western Interior Seaway)
- Biozone Significance: Oxytropidoceras is used in biostratigraphy of Upper Albian marine sequences in the Gulf Coast and Western Interior regions
- Formal Description: Originally described by Powell in 1963 (in reference to this species form)
Morphological Features:
- Strongly ribbed, compressed shell with high whorl profile
- Characteristic sharp ventral keel—a defining trait of the genus Oxytropidoceras
- Tubercles (nodes) visible on flanks and ventrolateral edges, often in trituberculate rows
- Complex ammonitic suture lines visible on the preserved surface
- Distinctly involute coiling with little umbilical exposure
Scientific Significance: Oxytropidoceras powelli is a notable ammonite from the Albian, often used for precise zonation in Cretaceous stratigraphy. Its well-defined keel and ornate shell structure make it highly diagnostic and useful in understanding mid-Cretaceous ammonoid evolution.
Collector and Display Appeal:
- Excellent contrast between fossil and matrix
- Natural preservation with minimal restoration
- Great for display, educational use, or scientific reference
Why Buy from Us?
- All fossils are 100% authentic and legally sourced
- Includes a Certificate of Authenticity
- Professionally selected, prepared, and photographed
This stunning Oxytropidoceras powelli fossil is a prized addition to any serious fossil collection—both for its rarity and biostratigraphic value. Own a piece of Cretaceous marine history today!
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