Description
A rare and well-preserved fossil ammonite: Skirroceras macrum, from the Middle Toarcian Stage of the Early Jurassic, discovered at Brunton, Cole Syncline, Somerset, United Kingdom. This highly sought-after ammonite is part of the rich Lower Lias ammonite succession of southwest England and provides valuable insights into Jurassic marine life and ammonite evolution.
The ammonite shown is the exact specimen you will receive, photographed with a 1cm scale cube for full sizing reference. Please see photos for full measurements and condition.
Geological & Palaeontological Information:
- Fossil Type: Ammonite
- Species: Skirroceras macrum (described by Buckman, early 20th century)
- Geological Period: Jurassic
- Stage: Middle Toarcian (~180 to 177 million years ago)
- Location: Brunton, Cole Syncline, Somerset, UK
- Depositional Environment: Offshore marine basin with fine-grained silts and mudstones forming part of the Lower Lias Group
- Order: Ammonitida
- Superfamily: Hildoceratoidea
- Family: Hildoceratidae
- Biozone (Inferred): Possibly from the Bifrons Zone or Variabilis Subzone, based on locality and preservation style
Morphological Features:
- Involute, thick-walled shell
- Prominent and widely spaced ribs
- Rounded venter with strong rib terminations
- Suture lines may be visible under closer inspection
- Classic Skirroceras form, with compressed whorls and bold ribbing
Notable Points:
- Skirroceras macrum is an important ammonite species for identifying subzones within the Middle Toarcian
- Fossils from the Cole Syncline are increasingly rare due to limited accessible exposures
- This specimen offers a combination of scientific value, collector appeal, and display aesthetics
Why This Fossil is Exceptional:
- Rare UK ammonite from a significant stratigraphic horizon
- Excellent size and preservation
- Ideal for fossil collectors, educators, or museum-quality display
- Supplied with a Certificate of Authenticity
- Ethically sourced and 100% genuine
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