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Cato Trough
The
Cato
Trough
or
Chesterfield
Trough
is an
oceanic
trough
in
the Coral
Sea of the South
Pacific Ocean
. It
separates
the
continental crust
of
Australia
and
Zealandia
to within and has a
depth
of. The trough is underlain by
oceanic crust
, having formed as a result of
seafloor spreading
from about
63
to
50
million years ago
.