Aperture fields of a rough closing fracture in Westerly granite

122 text files of the evolving aperture field of a rough fracture under increasing normal load. Each file lists three columns: 1) x-position (voxel), 2) y-position (voxel), and 3) aperture (micrometers). In this experiment, each voxel has a side length of 6.5 microns. Each file is a different stress increment of a triaxial compression experiment performed at the ESRF with in situ X-ray tomography. McBeck et al. (2025) describes the details of this experiment. McBeck, J., Cordonnier, B., & Renard, F. (2025). Asperity dynamics and secondary damage development during the closure of a fracture in granite. Tectonophysics, 231044.