Promicroceras Ammonite Fossil Slab – Polished Marston Marble, Lower Jurassic, Somerset UK
£ 30.00
An exceptional High-Grade Sliced and Polished Fossil Slab featuring multiple
specimens of Promicroceras marstonense, sourced from the renowned Marston Magna locality in Somerset, UK. These beautifully preserved ammonites are embedded in the distinctive Marston Marble, a fine-grained limestone from the Obtusum Zone of the Lower Lias, dating to the Lower Jurassic period, approximately 195–200 million years ago.This premium fossil slab has been expertly prepared and polished to enhance the detail and clarity of the ammonite shells. Each specimen displays its characteristic tightly coiled morphology, prominent ribbing, and fine suture lines that are signature features of the species.Fossil Type: Ammonite (extinct marine cephalopod)Species: Promicroceras marstonenseGeological Age: Lower Jurassic – Hettangian to Sinemurian, Obtusum ZoneFormation: Lower Lias, Marston MarbleDepositional Environment: Formed in a shallow marine environment with calm, low-energy conditions. Fine sediments allowed for detailed preservation of marine invertebrates, with occasional anoxic layers promoting fossil integrity. Marston Marble is known for producing well-preserved, densely packed ammonite assemblages.Morphological Features:
• Small, evolute ammonites with pronounced radial ribbing
• Tight coiling and minimal umbilicus
• Excellent preservation of internal whorls and chamber partitionsNotable:
• High-grade display slab from a classic Jurassic site
• Contains multiple ammonites across a polished limestone surface
• Ideal for collectors, educational purposes, and interior decor
• Actual specimen shown – photo is of the exact item you will receiveAuthenticity: All of our fossils are 100% genuine natural specimens and come with a Certificate of Authenticity. Each square or cube shown in the photo scale represents 1cm – please refer to the image for exact dimensions. This rare Promicroceras marstonense slab from Marston Magna offers a striking and scientifically valuable glimpse into early Jurassic marine life. A stunning fossil for serious collectors and enthusiasts alike.
specimens of Promicroceras marstonense, sourced from the renowned Marston Magna locality in Somerset, UK. These beautifully preserved ammonites are embedded in the distinctive Marston Marble, a fine-grained limestone from the Obtusum Zone of the Lower Lias, dating to the Lower Jurassic period, approximately 195–200 million years ago.This premium fossil slab has been expertly prepared and polished to enhance the detail and clarity of the ammonite shells. Each specimen displays its characteristic tightly coiled morphology, prominent ribbing, and fine suture lines that are signature features of the species.Fossil Type: Ammonite (extinct marine cephalopod)Species: Promicroceras marstonenseGeological Age: Lower Jurassic – Hettangian to Sinemurian, Obtusum ZoneFormation: Lower Lias, Marston MarbleDepositional Environment: Formed in a shallow marine environment with calm, low-energy conditions. Fine sediments allowed for detailed preservation of marine invertebrates, with occasional anoxic layers promoting fossil integrity. Marston Marble is known for producing well-preserved, densely packed ammonite assemblages.Morphological Features:
• Small, evolute ammonites with pronounced radial ribbing
• Tight coiling and minimal umbilicus
• Excellent preservation of internal whorls and chamber partitionsNotable:
• High-grade display slab from a classic Jurassic site
• Contains multiple ammonites across a polished limestone surface
• Ideal for collectors, educational purposes, and interior decor
• Actual specimen shown – photo is of the exact item you will receiveAuthenticity: All of our fossils are 100% genuine natural specimens and come with a Certificate of Authenticity. Each square or cube shown in the photo scale represents 1cm – please refer to the image for exact dimensions. This rare Promicroceras marstonense slab from Marston Magna offers a striking and scientifically valuable glimpse into early Jurassic marine life. A stunning fossil for serious collectors and enthusiasts alike.
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