Last Updated：2025/12/30
Sentence
One
system,
now
called
the
Plutonian,
regards,
the
earth's
crust
on
which
we
now
live,
as
the
debris
of
two
former
worlds,
and
our
present
continents
as
the
elevations
of
the
bottom
of
the
sea
by
subterranean
heat.
If
this
theory
be
founded
on
fact,
why
do
not
our
rocks
present
us
with
beds
of
shell-fish
in
families
as
are
now
living
at
the
bottom
of
the
sea?
Quizzes for review
One system, now called the Plutonian, regards, the earth's crust on which we now live, as the debris of two former worlds, and our present continents as the elevations of the bottom of the sea by subterranean heat. If this theory be founded on fact, why do not our rocks present us with beds of shell-fish in families as are now living at the bottom of the sea?
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