Late paleozoic climate revealed by coral fossil patterns

Fig 3. Diagram of growth ridges. A: A typical band on Carboniferous coral containing 30 ridges under a stereoscopic microscope. Specimen name: DZ-30-6; B: hundreds of ridges on our fossil coral epitheca observed under a stereoscopic microscope. https://doi.org/10.1371/journal.pone.0290127.g003 Fig 4. Diagram of coral fossil DZ-30-16 and enlargements of each part on coral epitheca (Late Carboniferous ~310 Ma, Shiqiantan Formation). More specimen details are included in the “S2 File”. https://doi.org/10.1371/journal.pone.0290127.g004 PLOS ONE Late paleozoic climate revealed PLOS ONE | https://doi.org/10.1371/journal.pone.0290127 August 15, 2023 5 / 13