Search SEDIS
| Data sets | Publications | Expeditions | Thesaurus |
670-km discontinuity  | |
|---|---|
| RT | discontinuities |
| mantle | |
| seismology | |
| transition zones | |
| upper mantle | |
| SN | Varies in depth, often found at 660 km. Discontinuity which coincides with the lower boundary of the C layer, the bottom of the upper mantle transition zone. Added to Thesaurus in 1998. |