GRAMMOCERAS striatulum Ammonite Fossil – Upper Toarcian Jurassic, Ravenscar Yorkshire UK
£ 60.00
Offered here is a well-preserved fossil of the elegant ammonite GRAMMOCERAS
striatulum, collected from the Upper Toarcian Stage of the Jurassic Period, near Ravenscar, Yorkshire, UK. This finely detailed ammonite is a prime example of the region’s exceptional fossil fauna and makes a striking addition to any collectionFossil Type & Species:
• Type: Ammonite (Extinct Cephalopod Mollusc)
• Species: Grammoceras striatulum
• Noted for its finely ribbed shell and narrow whorl profileGeological Context:
• Era: Mesozoic
• Period: Jurassic
• Stage: Upper Toarcian (~182–174 million years ago)
• Formation: Whitby Mudstone Formation or Ravenscar Group equivalent
• Depositional Environment: Calm, low-energy marine basin with fine-grained mud deposition. Ideal conditions for preserving complete ammonite shells and marine vertebrate fossilsMorphological Features:
• Compressed, discoidal shell with narrow whorls and very fine striations along the flanks
• Typically involute with a small umbilicus and sharply defined ribbing
• Whorl section is laterally compressed, giving the shell a sleek appearance
• Mineralised shell surface with subtle sheen from shale preservationScientific Importance:
• Grammoceras striatulum is a distinctive ammonite species used in biostratigraphy of the Toarcian stage
• Helps correlate Upper Jurassic marine beds across Europe
• Provides insight into ammonite evolution during times of environmental stress and recovery in the Jurassic seasLocality Information:
• Ravenscar, Yorkshire, United Kingdom – part of the world-famous Yorkshire Jurassic Coast, a designated UNESCO World Heritage area. Known for yielding exceptional marine fossils from the Lias and Middle Jurassic strataAuthenticity & Display:All of our fossils are 100% Genuine Specimens and come with a Certificate of Authenticity. The listing photos show the actual fossil you will receive. Please refer to the image for full dimensions – the scale rule cube = 1cm.This is a classic British Jurassic ammonite, ideal for collectors, educators, or fossil enthusiasts. A beautifully detailed relic of an ancient sea, over 180 million years old.Add a piece of Yorkshire’s Jurassic heritage to your collection with this exquisite Grammoceras striatulum fossil!
striatulum, collected from the Upper Toarcian Stage of the Jurassic Period, near Ravenscar, Yorkshire, UK. This finely detailed ammonite is a prime example of the region’s exceptional fossil fauna and makes a striking addition to any collectionFossil Type & Species:
• Type: Ammonite (Extinct Cephalopod Mollusc)
• Species: Grammoceras striatulum
• Noted for its finely ribbed shell and narrow whorl profileGeological Context:
• Era: Mesozoic
• Period: Jurassic
• Stage: Upper Toarcian (~182–174 million years ago)
• Formation: Whitby Mudstone Formation or Ravenscar Group equivalent
• Depositional Environment: Calm, low-energy marine basin with fine-grained mud deposition. Ideal conditions for preserving complete ammonite shells and marine vertebrate fossilsMorphological Features:
• Compressed, discoidal shell with narrow whorls and very fine striations along the flanks
• Typically involute with a small umbilicus and sharply defined ribbing
• Whorl section is laterally compressed, giving the shell a sleek appearance
• Mineralised shell surface with subtle sheen from shale preservationScientific Importance:
• Grammoceras striatulum is a distinctive ammonite species used in biostratigraphy of the Toarcian stage
• Helps correlate Upper Jurassic marine beds across Europe
• Provides insight into ammonite evolution during times of environmental stress and recovery in the Jurassic seasLocality Information:
• Ravenscar, Yorkshire, United Kingdom – part of the world-famous Yorkshire Jurassic Coast, a designated UNESCO World Heritage area. Known for yielding exceptional marine fossils from the Lias and Middle Jurassic strataAuthenticity & Display:All of our fossils are 100% Genuine Specimens and come with a Certificate of Authenticity. The listing photos show the actual fossil you will receive. Please refer to the image for full dimensions – the scale rule cube = 1cm.This is a classic British Jurassic ammonite, ideal for collectors, educators, or fossil enthusiasts. A beautifully detailed relic of an ancient sea, over 180 million years old.Add a piece of Yorkshire’s Jurassic heritage to your collection with this exquisite Grammoceras striatulum fossil!
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