The earth’s surface was reshaped after Noah’s flood. Is there any indication of the earth’s appearance before this?

This text is from a transcript of a talk by David Gooding, entitled ‘The Creator and the Creation Stories’ (2001).

Well, I don’t know! That would be an interesting question to put to geologists. One of the very big advances in the last century was the knowledge of tectonic plates and the way the earth’s surface and the tectonic plates are moving. This was discovered by investigations of the bed of the oceans, and you can measure how much these tectonic plates are moving in the course of a year. Some of their movements are the cause of our earthquakes, New Zealand being a case in point. As you know, on the eastern side of New Zealand the big plate coming in from the sea is buckling under the earth’s surface, getting hot below and producing volcanoes. On the other side of New Zealand, the two plates are sliding against each other and causing friction, and so forth; so that in some parts of the country you get the effect of steam coming up out of the ground. In one place, it is so abundant that they run a power station from it.

I don’t know how we would determine what the earth was like before the flood.