The whole party crowded to the spot where Uncas pointed out the impression of a moccasin in the moist alluvion.
整个派对都挤到了恩卡斯指出潮湿冲积层中有鹿皮鞋印象的地方。
英语百科
Alluvion
Alluvion is a legal term describing the increase in the area of land due to sediment (alluvium) deposited by a river. This changes the size of a piece of land (a process called accession) and thus its value over time.