Fig. 5.39. High-resolution sidescan sonar image of closely spaced pock marks from the large gulf between
Iran and Arabia. These pock marks are some 10 m wide and 2 m deep. Cementation around the pock marks is
suspected from the high backscattering (darker tones) circular rims, and from the presence of epifaunal animals seen on bottom photographs. (Courtesy of N. Kenyon, Southampton Oceanography Centre, England.)