杂砂岩（英语：greywacke）（德语：grauwacke）是一种碎屑沉积物，其特征通常是硬度高、颜色深、由石英、长石和岩石碎片组成的沉积岩，属于颗粒挑选度低，圆度差的结构不成熟的沉积岩，通常在古生代地层中发现[1]。杂砂岩是一种浊积流造成的海相沉积岩。通常在大陆架边缘。[2]
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