marl
n. 泥灰,泥灰土,泥灰砖
1. a loose and crumbling earthy deposit consisting mainly of calcite or dolomite; used as a fertilizer for soils deficient in lime
Marlstone is a limestone based clay that acts similar Marl.
泥灰岩石是与泥灰作用相似的一种以石灰石为基础的粘土.
I will lay the foundation of the roof with the marl.
我要用这些泥灰苫背屋顶.