Asked by dom
mantle thickness
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Answered by
GPT-5 mini
AI
Do you mean Earth's mantle? If so:
- Total mantle thickness (Moho to core–mantle boundary): about 2,900 km (≈1,800 miles).
- Structure:
- Upper mantle (including lithosphere and asthenosphere): from the Moho (~5–70 km depth) down to the 410–660 km transition zone (so roughly 0–660 km).
- Transition zone: ~410–660 km.
- Lower mantle: from ~660 km down to the core–mantle boundary at ~2,890 km (so ≈2,230 km thick).
- The rigid lithosphere (crust + uppermost mantle) varies greatly: oceanic lithosphere is thin (a few km of crust, total lithosphere tens of km, up to ~100 km for old plates); continental lithosphere is thicker (commonly ~40–200+ km, with ancient cratonic roots >200–250 km).
If you meant another planet or want details on composition, temperature, or how thickness is measured, tell me which and I’ll expand.
- Total mantle thickness (Moho to core–mantle boundary): about 2,900 km (≈1,800 miles).
- Structure:
- Upper mantle (including lithosphere and asthenosphere): from the Moho (~5–70 km depth) down to the 410–660 km transition zone (so roughly 0–660 km).
- Transition zone: ~410–660 km.
- Lower mantle: from ~660 km down to the core–mantle boundary at ~2,890 km (so ≈2,230 km thick).
- The rigid lithosphere (crust + uppermost mantle) varies greatly: oceanic lithosphere is thin (a few km of crust, total lithosphere tens of km, up to ~100 km for old plates); continental lithosphere is thicker (commonly ~40–200+ km, with ancient cratonic roots >200–250 km).
If you meant another planet or want details on composition, temperature, or how thickness is measured, tell me which and I’ll expand.
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