Planisphinctes planorbis Ammonite Fossil Lower Bathonian Normandy France

Description

Genuine Planisphinctes planorbis Ammonite Fossil

This is a genuine Planisphinctes planorbis ammonite fossil from the Lower Bathonian Stage of the Middle Jurassic. It was collected in Calvados, Normandy, France, a region renowned for fossil-bearing Jurassic marine rocks. The photographs show the actual specimen offered, so the natural shell form, colour, matrix, preservation and geological features visible in the images belong to the fossil you will receive.

Geological Age and Locality

The Bathonian Stage forms part of the Middle Jurassic and dates to approximately 168 to 166 million years ago. During this interval, much of north-western Europe was covered by warm shallow seas. Sediment accumulated on the seabed and occasionally buried ammonite shells before they were destroyed. Over millions of years, compaction, mineral-rich groundwater and geological change preserved those remains as fossils within solid rock.

Calvados lies in Normandy, where coastal cliffs, quarries and inland exposures reveal important Jurassic strata. Fossils from this region provide evidence of the marine ecosystems that once occupied the area and help palaeontologists compare rock sequences across Europe.

About Planisphinctes planorbis

Planisphinctes planorbis is an ammonite associated with Bathonian marine deposits. Ammonites were extinct cephalopods related to modern squid, cuttlefish and nautiluses. Their coiled external shells were divided internally into chambers. The animal lived in the final chamber, while the earlier chambers helped regulate buoyancy in the water.

The spiral form and ribbed ornament visible on ammonites are both attractive and scientifically informative. Individual fossils may preserve original shell material, an internal mould, mineral replacement, surrounding matrix or natural weathering. These variations are genuine results of fossilisation and make every specimen unique.

Scientific and Collecting Interest

Ammonites evolved rapidly and were distributed widely through Jurassic seas. Their changing shell forms allow palaeontologists to use characteristic assemblages as guide fossils when comparing the relative ages of sedimentary layers. A Planisphinctes planorbis specimen from the Lower Bathonian therefore provides a tangible connection with the evidence used to reconstruct geological time and marine evolution.

This carefully selected fossil is suitable for an ammonite collection, educational display, geological study cabinet or natural-history interior. Its Normandy provenance will particularly interest collectors of French fossils and European Jurassic material. It can also make a thoughtful gift for anyone fascinated by palaeontology and ancient oceans.

Actual Specimen and Sizing

Please examine all photographs closely because they form an important part of the description. You will receive the exact fossil pictured, not a substitute specimen. Full sizing is shown in the photograph for an accurate visual reference. Any matrix, irregularities, mineral variations or weathering visible in the images are authentic features of the specimen.

Certificate of Authenticity

A generic Certificate of Authenticity accompanies this fossil and carries our lifetime guarantee that it is genuine. This provides lasting reassurance and provenance for the collector. Handle the specimen carefully and keep it away from excessive humidity, prolonged direct sunlight and sudden temperature changes.