Promicroceras marstonense Fossil Ammonite
This Promicroceras marstonense fossil is presented as a multi-block specimen from Marston Magna, Somerset, UK. It is identified with the Marston Marble, the Obtusum Zone, the Lower Lias and the Lower Jurassic, giving the piece clear geological and palaeontological interest for ammonite collectors, fossil enthusiasts and displays focused on Jurassic marine life.
The specimen represents Promicroceras marstonense, an ammonite from the Lower Jurassic. Ammonites were extinct marine cephalopods related to modern squid, cuttlefish and nautiluses. Their coiled shells and well-defined biostratigraphic ranges make them especially important to fossil collectors and to the study of Jurassic rocks. A specimen associated with a named zone such as the Obtusum Zone offers additional geological context beyond the fossil identification alone.
Marston Marble and Geological Context
The fossil is associated with Marston Marble at Marston Magna in Somerset. Within the supplied identification, it is placed in the Obtusum Zone of the Lower Lias, part of the Lower Jurassic. The Lower Jurassic is a major interval of Earth history known for marine sedimentary deposits and diverse fossil assemblages. Ammonites from this period are valued because they can help document changes in marine environments and provide useful comparisons between Jurassic strata.
The combination of a named ammonite, locality, lithological designation and biostratigraphic zone makes this an engaging piece for a geological cabinet. It can be displayed as a representative Lower Jurassic fossil or used as a conversation piece when discussing ammonite evolution, Jurassic stratigraphy and the fossil-bearing rocks of Somerset.
Collection and Certificate
From the Alice Purnell Collection
This Fossil is a genuine specimen and Includes a fully hand-signed Premium Certificate of Authenticity.
The certificate wording accompanies the specimen as supplied and provides an important part of its presentation for collectors. The fossil is suitable for a private collection, educational display, geological study area or cabinet arranged by period, locality or fossil group.
Photographs and Sizing
The photograph shows the actual specimen you will receive.
Full sizing is shown in the photographs. Please use the photographic scale and overall presentation to assess the specimen’s size and layout before purchase. The multi-block format provides a distinctive display arrangement and allows the fossil material to be viewed as part of a larger geological piece rather than as an isolated loose fossil.
Collector Interest
Promicroceras marstonense is a specific ammonite identification, while the Marston Marble, Obtusum Zone, Lower Lias and Lower Jurassic references connect the specimen to a defined geological setting. This makes the piece particularly appealing to collectors who catalogue fossils by genus, species, stratigraphic interval or locality. It also offers a practical way to introduce the relationship between fossil identification and the rocks and zones in which fossils are found.
Whether placed in an ammonite collection, a Jurassic fossil display or a study cabinet dedicated to British localities, this Marston Magna specimen brings together identifiable palaeontology and regional geological context in one collectible piece.
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