The concept of the 'Anthropocene' has gained traction among geologists as a proposed new geological epoch defined by significant human impact on Earth's geology and ecosystems. Unlike previous epochs, which were shaped by natural forces such as volcanic activity or asteroid impacts, the Anthropocene is characterized by anthropogenic markers including radioactive isotopes from nuclear tests, plastic pollution, and elevated carbon dioxide levels. However, the formal recognition of this epoch remains contentious. Some scholars argue that human influence, while pervasive, does not yet represent a distinct stratigraphic boundary comparable to those of the Pleistocene-Holocene transition. Others contend that the scale and irreversibility of changes, such as biodiversity loss and climate alteration, justify a new epoch. This debate underscores a broader challenge in stratigraphy: balancing geological precision with the need to communicate planetary-scale changes.
❓ 围绕正式承认“人类世”为地质时代存在争议的主要原因是什么？
A. A. 人类影响在地质记录中尚不可检测。
B. B. 一些学者质疑人类引起的变化是否符合一个独特地层边界标准。
C. C. 这个时代缺乏诸如放射性同位素或塑料污染之类的明确标志。
D. D. 地质学家一致认为，自然力量仍然是地质变化的主要驱动力。
✅ 正确答案
B. Some scholars question whether human-induced changes meet the criteria for a distinct stratigraphic boundary.