Generalized Models for Rock Joint Surface Shapes

Figure 5

Typical profile curves of joint surface (sample size is 15 cm and scale is 1 : 3). ① Planar and smooth (carbonaceous slate foliation). ② Planar and rough (plagioclase hornblendite joint). ③ Single stepped (phyllite joint). ④ Compound single stepped (volcanic breccia joint). ⑤ Multistepped (volcanic breccia joint). ⑥ Compound multistepped (volcanic breccia joint). ⑦ Undulating (carbonaceous slate foliation). ⑧ Undulating (plagioclase hornblendite joint). ⑨ Undulating (plagioclase hornblendite joint). ⑩ Undulating (calcilutite joint). ⑪ Compound undulating (mixed hornblendite joint). ⑫ Asymmetric undulating (breccia-bearing fusion tuff joint). ⑬ Asymmetric undulating (siltstone ripple bedding). ⑭ Symmetric undulating (siltstone ripple bedding).