Dating and Floods

It has been repeatedly stated by creationists in this forum that a worldwide catastrophe such as a flood would affect dating methods to such a degree that they would be more or less invalid.
From the scientists I would like to know how many dating techniques work just as well on rocks under the sea and any links to successfull dating of such rocks. And in fact is the presence of water ever considered to be significant in dating of rocks? Surely not as almost all fosil bearing rock is likely to have formed in the presence of water, often at the bottom of a lake, river or sea.
From the creationists, do you have any explanation as to how flooding would affect dating techniques?

Originally posted by twhitehead
From the creationists, do you have any explanation as to how flooding would affect dating techniques?

You have to be very sure of your partner before you get on the Ark.

Originally posted by Bosse de Nage
You have to be very sure of your partner before you get on the Ark.

You'd be too late for the Ark. Grab the first one and run like hell.

Originally posted by twhitehead
is the presence of water ever considered to be significant in dating of rocks?

I dated a rock and found her to be a good conversationalist, especially when wet.

Dating rocks.