Marston Magna Marble from the Lower Lias of Dorset. Promicroceras martonense showing preservation of the original shell and iridescence caused by the

---

Marston Magna Marble from the Lower Lias of Dorset. Promicroceras martonense showing preservation of the original shell and iridescence caused by the mineral

---

Size: 7237px × 4830px
Photo credit: © SINCLAIR STAMMERS/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ammonites, aragonite, cephalopods, era, fossiliferous, fossilisation, fossilised, fossils, iridescence, jurassic, lias, mesozoic, mother, pearl, rocks