boulder clay中文什么意思

【地质学；地理学】泥砾；冰砾泥。

• boulder:    n. 圆石，卵石；【地质学；地理学】 ...
• clay:    n. 1.黏土；泥土。 2.(相对于 ...
• clay boulder:    泥砾层

英文释义

名词

1. unstratified soil deposited by a glacier; consists of sand and clay and gravel and boulders mixed together
   同义词：till

百科释义

Boulder clay, in geology, is a deposit of clay, often full of boulders, which is formed in and beneath glaciers and ice-sheets wherever they are found, and was the typical deposit of the Glacial Period in northern Europe and North America.