Fig. 7

X-ray CT image analysis results for the Awano–Tabiki outcrop samples. CT images of the a AT, b HA-1, and c ATS-2 samples. CT number histograms for the d AT-1, e AT-2, f AT-4, g HA-1, and h ATS-2 samples. The NCTM value for each zone was calculated near the center (within the white dotted lines in (a)–(c)), with the peripheral areas excluded. CT number profiles for i AT, j HA-1, and k ATS-2, with the values calculated along the dash-dotted lines in (a)–(c), respectively