泥砾又称冰砾土或冰川泥砾。由冰川直接堆积的粘土、砾石和砂呈无层状分选的混合体，没有层状分选。冰碛中的含泥量，决定于基岩地层受冰川剥蚀时产生粘土的多少。发育在坚硬的粗粒岩层的冰川堆积物，粘土含量很少，常成砂砾冰碛。
三角洲平原分流河道沉积底部泥砾较发育，沼泽沉积中发育植物根和褐煤沉积；三角洲前缘河口砂坝沉积物粒度较平原决口扇粗。
Mud gravel is often found in the base of distributary channel sediment, plant root and lignite often develop in the swamp sediment.
本文主要研究断层泥中新生的粘土矿物特征，并研究断层泥中石英碎砾表面溶蚀的显微形貌结构特征。
In this paper, characteristics of neogenic clay minerals and micro-surface texture of quartz fragment in fault gouge are discussed.
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