Last Updated：2022/12/22
Sentence
Given
enough
time,
the
logic
goes,
water
can
cleave
solid
rock
and
mountains
can
be
reduced
to
plains.
This
"gradualism"
now
underpins
modern
geologic
thought.
...
Maybe
we'll
find
evidence
that
the
rock
layers
are
exposed
on
the
flanks
of
Mount
Sharp
[on
Mars]
not
because
a
river
carved
through
them
over
millions
of
years,
but
because
the
wind
blew
against
them
for
billions
of
years
–
the
ultimate
in
gradualism.
Quizzes for review
Given enough time, the logic goes, water can cleave solid rock and mountains can be reduced to plains. This gradualism
now underpins modern geologic thought. ... Maybe we'll find evidence that the rock layers are exposed on the flanks of Mount Sharp [on Mars] not because a river carved through them over millions of years, but because the wind blew against them for billions of years – the ultimate in gradualism.
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