Last Updated：2025/12/29
Sentence
There
is,
within
our
area,
a
great
gap
between
the
Eocene
group
and
the
later
tertiaries,
indicated
by
the
difference
of
their
organic
contents.
Between
the
existing
fauna
of
our
seas
and
the
oldest
stage
of
the
later
tertiaries,
there
is
a
distinct
and
extensive
relationship
of
identity
of
species.
Quizzes for review
There is, within our area, a great gap between the Eocene group and the later tertiaries, indicated by the difference of their organic contents. Between the existing fauna of our seas and the oldest stage of the later tertiaries, there is a distinct and extensive relationship of identity of species.
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