Over hundreds of years, perhaps over thousands of years, the current would break it up.

4 seconds sound clip from the Creature from the Black Lagoon (1954) movie soundboard.

You can hear this line at 00:17:16.252 in the Blu-ray version of the movie.

Quote context

[...]

- Had enough, Mark, or do we keep on digging?

- I'll tell you when I've had enough.

- We've failed, that's all people will understand.

- Have you any idea what this tributary empties into?

- My boys used to tell me there's a lagoon at the end of it.

- What are you getting at?

- I was just thinking.

- It could be that at some time in the past, part of this bank broke away and fell into the river here.

- Over hundreds of years, perhaps over thousands of years, the current would break it up.

- If there is a dead end to this tributary, that's where we'll find the fragments. We might even find the rest of your fossil.

- It's a theory.

- What's wrong with that?

- Even if David's theory is correct, the chances of finding anything are remote.

- Science is always taking the remote chance. Why don't we try it? We might still turn failure into success.

[...]