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Preliminary underwater survey for prehistoric sites in the Dampier Archipelago in the Pilbara region of Western Australia had the particular aim of assessing the possibility of finding engravings (petroglyphs) on granophyre rocks outcropping on the sea floor. The numerous engraving galleries occurring among granophyre rocks on the mainland and in the archipelago's islands include deeply weathered petroglyphs that may be of great age, suggesting that the galleries could in part pre-date seadoi:10.1080/03122417.2002.11681739 fatcat:ikhel5s3znehncvfkctza6hj6a