Rapid volcanic ash entombment reveals the 3D anatomy of Cambrian … – AAAS

The conservation of three-dimensional (3D) external soft anatomy of the trilobites ( Figs. 2, 3, and 4; figs. S3 to S9; and movies S1 to S4) required rapid molding following burial through the conversion of glassy ash to the intergrown quartz-chlorite-albite mineral assemblage. The introduction of volcanic ash into the marine environment is …

https://www.science.org/doi/10.1126/science.adl4540