Table 1.

Description and statistics of rock exposures under different sampling scales.

Sampling Scales	Sample Size	Minimum	Maximum	Mean	Standard Deviation	Coefficient of Variation	Skewness	Kurtosis
150 m × 150 m	2755	0.00	95.00	15.94	22.29	139.84	1.33	0.79
300 m × 300 m	802	0.00	92.00	12.89	21.42	166.18	1.90	1.69
450 m × 450 m	357	0.00	88.00	12.18	20.71	170.03	1.35	0.78
600 m × 600 m	200	0.00	85.00	11.97	20.51	171.35	1.99	1.71
750 m × 750 m	128	0.00	75.00	10.22	17.52	171.43	2.29	1.72
900 m × 900 m	91	0.00	73.00	9.89	19.55	197.67	2.52	1.83