Question

A geologist finds ripples preserved in ancient sedimentary rock that look just like ripples made by water in mud. He concludes that there was once water in that location that created the ripples.

Why is this conclusion reasonable?

Answer 1

It is reasonable because the ripples in the rock show how old and how fast the water went to make the rock. It also describes the time that it has been there, depending on how many years ago it was.

( I tried. I'm not that great at any kind of science )

Answer 2

because water and mud behaved in a similar way in the past as they do today (SI)