I mark eras without clocks, recording change through layers hidden in plain sight. What am I?
Category: Knowledge · Difficulty: expert
Hint: Think about earth’s records written in layers.
Answer
A geological sedimentary strata
Explanation
Sedimentary strata preserve Earth's history in rock layers over time, distinct from human records or astronomical data.
This is a expert knowledge riddle — one of the harder riddles here. The answer is A geological sedimentary strata.
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