Figure 10 Photographs showing rhythmic lamination (A) and convolute lamination (B, C) in middle intertidal zone. Recessive laminae (arrows) in A and C represent sandier material deposited during spring tides. Diameter of lens cap (A) is 6.5 cm. Coin (B, C) is 2.5 cm diameter. Note that convolute lamination is sharply truncated by erosion surface (C). The sharply overturned anticline (C) suggests that deformation may be a result of downslope movement to the left.