A cut and polished ammonite from Madagascar showing the gas flotation chambers separated by septa and infilled with yellow calcite.

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

Keywords: ammonite, chambers, extinct, fossil, gas, madagascar, mollusc, septae