Description
Promicroceras Calcite Ammonite Fossil – Black Ven Marls, Lower Lias, Jurassic Coast, Stonebarrow Cliff, Charmouth, Lyme Regis, Dorset, UK
We are delighted to offer this Promicroceras ammonite fossil, featuring exquisite calcite preservation, discovered from the Black Ven Marls of the Lower Lias formation along the Jurassic Coast at Stonebarrow Cliff, Charmouth, and Lyme Regis, Dorset, UK. This specimen was discovered by our team members, Alister and Alison, on 26 April 2025, and has been carefully cleaned, prepped, and treated by Alison to ensure its preservation and visual appeal.
- Fossil Identification & Provenance:
- This 100% genuine fossil is a Promicroceras ammonite from the Lower Lias formation of the Jurassic Coast, found in the Black Ven Marls at Stonebarrow Cliff, Charmouth, and Lyme Regis. The Jurassic Coast is a UNESCO World Heritage Site, celebrated for its abundant ammonite fossils. The Promicroceras genus is known for its distinctive spiral shape and fine ribbing.
- Physical Details:
- Length: Approximately 5 inches (12.7 cm)
- Weight: Full size and weight details can be provided upon request
- Measurements: Full sizing available in the accompanying images
- The 1 cm scale cube shown in the photos provides an accurate size reference.
- Species Information:
- Promicroceras is an extinct genus of ammonites from the Lower Jurassic period, which lived around 174–163 million years ago. This genus is known for its tight coiling, fine ribbing, and distinctive spiral shape. The calcite preservation of this specimen makes it particularly striking, with the ammonite shell exhibiting rich textures that reflect the geological processes it has undergone.
- Geological & Depositional Context:
- Zone: The fossil comes from the Lower Lias formation, a part of the Lower Jurassic period, approximately 174–163 million years ago.
- Morphological Features: The Promicroceras features a tightly coiled shell, smooth whorls, and fine ribbing. The calcite that fills the ammonite’s shell is well-preserved, creating a stunning visual effect.
- Notable: The calcite preservation is particularly noteworthy, making this fossil stand out among other ammonites.
- Biozone: The fossil is from the Lower Lias Biozone, known for its rich marine life and abundant ammonite species.
- Depositional Environment: The Black Ven Marls formed in a shallow marine environment rich in calcareous sediments, ideal for the preservation of ammonites and other marine organisms.
- Geological Stage: This ammonite dates back to the Lower Jurassic, a period marked by an explosion in marine biodiversity, especially ammonites.
- Family: Ammonitidae
- Super Family: Ammonoidea
- Order: Ammonitida (Ammonites)
- Certificate of Authenticity:
- This ammonite comes with a Certificate of Authenticity, ensuring its genuine nature and provenance. The exact Promicroceras ammonite fossil shown in the photos is the one you will receive.
Why Choose This Fossil?
- A rare and beautifully preserved Promicroceras ammonite fossil from the Lower Lias formation of the Jurassic Coast, known for its calcite preservation.
- The tightly coiled spiral, fine ribbing, and calcite preservation make this ammonite a visually striking piece.
- A highly collectible specimen for those interested in Jurassic fossils, marine life fossils, or ammonite fossils.
- Genuine natural history artifact from the Jurassic Coast of Dorset, UK, weighing approximately 0.5kg and measuring 5 inches (12.7 cm), perfect for display or study.
**Thank you for considering this remarkable Promicroceras ammonite fossil from the Lower Jurassic period. If you have any questions or would like additional photos or details about this specimen, feel free to contact us. We are dedicated to offering genuine fossil specimens, and we are confident this piece will make a fascinating addition to your collection.
