Scanning electron microscope images (IMAGE) Geological Society of America Caption Scanning electron microscope images of organic biomorphs composed of filaments and spheres in pre-silicification conditions (A) and biomorphs with preserved original structures / morphologies / shapes (B) after two weeks of experimental silicification. Credit Credit: Nims et al. Usage Restrictions Credit: Nims et al. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.