Answer: The Gutenberg (the G) (Revenaugh and Jordan, 1991b) or 8. -discontinuity (Thybo and Perchuc, 1997) marks the transition from the lid, which is defined as the uppermost mantle beneath the Moho, to the low-velocity-zone (LVZ), which characterizes the transition to the convecting mantle.
Step-by-step explanation: