29/05/2026
Photo of the month June 2026: Thin section of a stromatoporoid (hypercalcified sponge) from the Silurian of Gotland in transmitted light (right, TL) and fluorescent light (left, FL). Orange arrow indicates the stromatoporoid skeleton, purple arrow points to a gallery, and white arrows shows an example of a microgallery. Yellow dashed lines mark outline of FRIC crystals (picture modified from Dworczak et al. 2026, FACIES, vol. 72, no. 18; online available at:
https://link.springer.com/article/10.1007/s10347-026-00732-w)