Schloenbachia varians subplana Ammonite Fossil Sussex UK with COA

Description

Genuine Schloenbachia varians subplana Ammonite Fossil

This genuine ammonite fossil is identified as Schloenbachia varians subplana and comes from Glynde in East Sussex, United Kingdom. It dates to the Lower Cenomanian of the Cretaceous and is a carefully chosen British specimen with useful form, geological age, and locality information. The photographs show the actual fossil offered for sale, so the ammonite pictured is the exact specimen you will receive.

Lower Cenomanian Cretaceous Age

The Cenomanian is the earliest stage of the Late Cretaceous Period, beginning approximately 100.5 million years ago. This fossil comes from the Lower Cenomanian, close to the start of that stage. High global sea levels created broad shallow marine environments across Europe. Southern Britain lay beneath warm seas inhabited by ammonites, bivalves, echinoids, fish, and many other organisms.

After death, an ammonite shell could settle on the sea floor and become buried by fine sediment. Compaction, mineral replacement, and later geological change preserved the shell or internal mould as a fossil. The documented Lower Cenomanian age gives this specimen a clear place within the early Upper Cretaceous marine succession.

Schloenbachia varians subplana

Schloenbachia was an extinct marine cephalopod with a coiled shell divided internally into chambers. The living animal occupied the final body chamber, while earlier sealed chambers assisted with buoyancy control. Ammonites were relatives of modern squid, cuttlefish, and nautiluses, although they formed their own diverse and now extinct group.

Schloenbachia varians is famous for considerable variation in shell form and ornament. The subplana form is associated with a comparatively compressed or flatter shell profile while retaining characteristic Schloenbachia features. Individuals may show curved ribs, subtle to stronger tubercles, an umbilical region, and a keel along the outer edge. Examine the photographs for the whorl shape, rib pattern, keel, ornament, natural matrix, and preserved surface details visible on this individual fossil.

Scientific and Stratigraphic Interest

Ammonites evolved relatively rapidly and were widely distributed through ancient seas. Their changing shell forms make them valuable index fossils, allowing geologists to compare sedimentary sequences and establish relative ages. Schloenbachia is closely associated with Cenomanian strata and is important for understanding ammonite evolution near the beginning of the Late Cretaceous.

An ammonite shell grew by adding progressively larger chambers around the outer whorl. Internal septa met the shell wall along complex suture lines, reinforcing the chambered structure. Ribs, tubercles, and the ventral keel also contributed to shell architecture and may have influenced strength and movement through the water.

Glynde and East Sussex Provenance

Glynde lies in East Sussex, a county well known for Cretaceous geology and fossil-bearing marine rocks. Sediments deposited in ancient seas preserve evidence of changing environments and diverse marine life. A specimen from a named East Sussex locality carries valuable geographical and educational context.

This fossil can complement a collection arranged by British county, locality, geological stage, ammonite genus, morphological form, or ancient marine environment. Its provenance connects the specimen with the important Cretaceous record of southern England.

Natural Fossil Character

Natural colour, mineral texture, small breaks, areas of wear, and variations in preservation reflect the fossil’s long geological history. These are expected features of an authentic specimen rather than manufacturing defects. Every ammonite preserves a different combination of shell material, mineral replacement, internal mould, and surrounding rock, giving each piece unique display character.

The multiple photographs show this exact Schloenbachia varians subplana from useful angles. They allow close inspection of its condition, ornament, outline, matrix, proportions, and display qualities. Full sizing is shown in the photographs, which provide the clearest scale information for this individual fossil. The images are not stock photographs and do not represent a similar specimen.

Certificate of Authenticity

This genuine fossil includes a generic Certificate of Authenticity card with a lifetime guarantee. Its Lower Cenomanian age, Glynde provenance, characteristic subplana shell form, and authentic preservation make it a distinctive addition to a fossil cabinet, study collection, office display, or educational setting. It is also a thoughtful gift for anyone interested in British palaeontology, East Sussex fossils, Cretaceous marine life, ammonite evolution, or genuine natural history specimens.