Figure
F37. Basement sections drilled during Leg 192 and at the three
previous DSDP and ODP Ontong Java Plateau basement sites (as in Fig. F36),
with water depths corrected to remove the effect of sediment loading. The
corrected basement depth (Dc) is obtained from the equation
of Crough (1983): Dc = dw + ts
(s -
m)/(
w
-
m), in which dw
is water depth in meters, ts is sediment thickness in
meters,
s is
average sediment density (1.90 g/cm3),
m
is upper mantle density (3.22 g/cm3), and
w
is seawater density (1.03 g/cm3).