漂砾（glacial erratic），又译冰川漂砾或冰碛石（glacial moraine）是和周边石料相比形状和材质截然不同的天然石块，小则数厘米，大可达数米甚至数十米，成因是冰川的活动。冰川的搬运能力相当强，一些漂砾甚至被搬运到千百公里之外。[1]加拿大阿尔伯塔奥克托克斯的巨型漂砾，重达1.5万吨。
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