Description
Asteroceras obtusum and Promicroceras Ammonite Fossil
This fossil is identified as Asteroceras obtusum and Promicroceras, an ammonite specimen from the Jurassic Coast of Dorset, United Kingdom. It comes from the Black Ven Marls of the Lower Lias and was collected at Stonebarrow Cliff, Charmouth. The combination of named ammonite identification and documented Jurassic Coast locality makes this a distinctive addition for fossil collectors, geology enthusiasts, and anyone interested in the palaeontology of southern England.
Locality and Geological Setting
The specimen originates from Stonebarrow Cliff near Charmouth, within the Jurassic Coast. Its stated geological source is the Black Ven Marls, part of the Lower Lias. The Lower Lias represents an important succession of Jurassic rocks known for preserving marine fossils, including ammonites. These rocks are exposed along the Dorset coast, where the natural cliffs and foreshore provide access to an internationally recognised sequence of geological strata.
The Black Ven Marls are associated with fine-grained marine sediments. In general geological terms, marl is a sediment containing a mixture of clay minerals and carbonate material. Such deposits can preserve fossil remains by burying them within layered marine sediments. This geological context gives the specimen added educational interest, connecting it with the ancient marine environments recorded in the Lower Lias.
Ammonite Identification
Asteroceras obtusum and Promicroceras are ammonite names associated with Jurassic fossil study. Ammonites were extinct marine cephalopods with coiled shells, and their fossils are widely valued for their importance in understanding Jurassic marine life and stratigraphy. Their occurrence in rock successions has helped geologists compare and establish the relative ages of sedimentary layers across different areas.
The supplied identification makes this specimen relevant to collectors focusing on Jurassic ammonites, Lower Lias fossils, Dorset geology, and the fossil heritage of the Jurassic Coast. It is also suitable for educational displays, natural history collections, geology teaching, or as a conversation piece for anyone fascinated by extinct marine animals and the history recorded in sedimentary rocks.
Collection and Preparation
Your specimen was discovered by our own team members, Alister and Alison and has been cleaned, prepped and treated by Alison.
The specimen’s connection to a named collecting team and its stated preparation history provide useful background for collectors who value information about how a fossil was recovered and prepared. Its documented source at Stonebarrow Cliff, Charmouth, links it directly with one of the most notable fossil-collecting areas of the Dorset coast.
Certificate of Authenticity
This Fossil is a genuine specimen and Includes a Certificate of Authenticity lifetime guarantee generic card.
The included certificate wording provides accompanying documentation for the fossil and makes it suitable for presentation as part of a labelled collection. Displaying the specimen alongside its locality and geological information can help communicate the connection between the ammonite identification, the Lower Lias, the Black Ven Marls, and the Jurassic Coast of Dorset.
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