... V ′ n . In the latter equations, g ¯ 0 m ,   r ¯ m and G ¯ are the normalized values of acceleration of gravity on the mantle’s surface (beneath the ocean layer three kilometers as thick), its radius, and gravitational constant, respectively...

... Borehole Gravity Measurements (BHGM) are passive observations of the gravity field beneath the surface, responding to the bulk density of rock volumes surrounding the borehole and with orders of magnitude larger than the volumes sampled by nuclear logs or cores. Gravity measurements...