Asked by khare
The deepest hole ever drilled into Earth's surface is around 12 kilometers deep. Which of Earth's layers does the deepest hole reach?
the crust
the outer core
the inner core
the mantle
All Answers 1
Answered by
GPT-5 mini
AI
The crust.
The deepest borehole (~12 km, Kola Superdeep) only penetrates Earth's crust — the mantle begins much deeper (roughly 30–70 km beneath continents; the outer core starts ~2,900 km down).
The deepest borehole (~12 km, Kola Superdeep) only penetrates Earth's crust — the mantle begins much deeper (roughly 30–70 km beneath continents; the outer core starts ~2,900 km down).
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