This volume, although not an integrated synthesis, treats most aspects of Holocene sedimenta­ tion and diagenesis in the Persian Gulf, grouping 22 contributions under a single cover and in one language. Because these sediments and diagenetic minerals are comparable to those existing in many ancient sedimentary basins, their appraisal should be of value to the enlarging group of workers who interpret ancient sedimentary rocks. The essential morphological, climatic and oceanographic factors determining Holocene sedimen­ tation and diagenesis in the Persian Gulf are summarized in the introductory article by PURSER and SEIBOLD. These environmental controls and the overall morphology of the Persian Gulf have much in common with Shark Bay, Western Australia, described by LOGAN et al. (1970). On the other hand, the Persian Gulf is markedly different from the better known Florida and Bahamian prov­ inces; the floor of the Persian Gulf is gently inclined from continental shoreline to bathymetric axis (80-100 m); the Bahamian province, on the other hand, is horizontal and extremely shallow (2-10 m), with very sharply defined shelf edges surrounded by deep oceanic waters. These contrast­ ing architectural styles are related to different tectonic frames.