Crawford Lake shows humans started a new chapter in geologic time, scientists say

A humble lake in a Canadian suburb may soon become the symbolic starting point for a radical new chapter in Earth’s official history: the Anthropocene, or the age of humans. A group of scientists said Tuesday the best evidence for humanity’s overwhelming impact on the planet could be found at Crawford Lake in Milton, Ontario. The lake’s finely layered sediments contain a thousand-year record of environmental history, culminating in an explosion of man-made disruption around the middle of the 20th century.

tips

suburb 郊区（urb- = city，城市）

radical 激进的；根本的；基本的；文章表示一个全新、彻底的、激进的新篇章

finely layered sediments 细致分层的沉淀物

sediment 沉淀物（sedi- = sit，坐）

fine 很好；细小的；精细的；罚款

finely 细致地；敏锐地

culminate 到顶点（culmin- 顶点）