Figure 4.
The image displays a close-up view of a rock surface, highlighting a central area with several visible cracks. Red arrows point to various cracks and notable features on the surface, indicating their locations. A yellow arrow highlights a specific crack or detail in the rock. The scale bar at the bottom indicates a length of two millimeters, providing context for the dimensions of the observable features. The rock appears embedded in a concrete-like material with visible texture and composition.Sharp cracks (yellow arrow) and onion-skin cracks (red arrows) observed in an andesite aggregate particle (Kawabata et al. (2024)). A full-colour version of this figure can be found on the ICE Virtual Library (Link to Emerald InsightLink to the website of emerald.)