漂礫（glacial erratic），又譯冰川漂礫或冰磧石（glacial moraine）是和周邊石料相比形狀和材質截然不同的天然石塊，小則數厘米，大可達數米甚至數十米，成因是冰川的活動。冰川的搬運能力相當強，一些漂礫甚至被搬運到千百公里之外。[1]加拿大阿爾伯塔奧克托克斯的巨型漂礫，重達1.5萬噸。
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