marlaceous facies

例句：

1. 1. Thebeach is covered in marlaceous sand.
   海滩上覆盖着多石的沙子。
2. 2.The road was marlaceous and difficultto navigate.
   这条路多石且难以导航。
3. 3.The riverbed is marlaceous withrocks and pebbles.
   河床多石，布满了岩石和卵石。