The concept of the 'Anthropocene' has gained traction among geologists as a proposed new geological epoch defined by human impact on Earth's systems. Unlike earlier epochs, which are distinguished by natural climatic shifts or biological events, the Anthropocene is marked by stratigraphic signals such as radioactive isotopes from nuclear tests, plastic pollution, and elevated carbon dioxide levels. However, the formal recognition of this epoch remains contentious. Critics argue that human effects are diachronous, meaning they appear at different times across the globe, which violates the synchronous boundaries required for a formal geological unit. Proponents counter that the mid-20th century 'Great Acceleration' provides a globally consistent marker, albeit one tied to industrial development. This debate highlights a fundamental tension: whether geological classification should prioritize measurable physical markers or reflect broader societal narratives about humanity's role in shaping the planet.
❓ According to the passage, what is a primary reason why some geologists oppose the formal recognition of the Anthropocene?
A. Human impacts are not significant enough to alter geological strata.
B. The proposed markers are not globally simultaneous in their appearance.
C. The epoch's start date is too recent to be studied by geologists.
D. Radioactive isotopes and plastics are not considered reliable indicators.
✅ 正确答案
The proposed markers are not globally simultaneous in their appearance.
IELTS Reading Tips
Skim the questions first, underline keywords, then locate in the passage
Watch for paraphrasing; correct answers are often reworded
Be wary of absolute statements (all, always, never) — usually wrong
Pay attention to content after transition words (however, but, yet)
Manage time: about 20 minutes per passage; skip difficult questions first