Why are the White Cliffs of chalk not taken out by the Flood? So The Great Flood God sent out in the time of Noah.  Why did the flood not take out the chalk wall in Dover because chalk is so easily washed up. 


catastrophist have made attempts to tackle the problem of how these kinds of chalk deposits could have formed during the flood, the details are still where difficult to understand in the framework of catastrophism.
Who says they weren't? 

The famous cliffs of Dover looked very different thousands of years ago. Prior to the flood, during the time of Doggerland, there weren't any cliffs there at all, just rolling hills. It wasn't until the sea levels rose around 6,500–6,200 BC that the UK was cut off from the mainland and the water started eroding the hillside. The flood occurred ~4,000 BC, so the cliffs would have been relatively new still since the sea levels rose. We've seen far more erosion since the flood. The cliffs historically have eroded at a rate of about 1-2 inches per year, by that figure we can assume the cliffs may have extended up to half a kilometer further into the ocean at the time of the flood. The rate of erosion has since sped up, the cliffs are eroding at a rate of almost 12 inches a year now. Mass wasting events continue to occur on the cliffs, the most recent being in 2012 (see photo below).  Most undoubtedly the flood would have caused significant mass wasting events at the time, particularly after the flood waters would have receded, but there have been a few thousand years of waves beating against the shore since then to cut the cliffs back again. It won't be too long before the pile from the event shown below gets cleaned up by the waves, and the cliff looks like itself again. 

The cliffs of Dover continue to be taken out by the sea year after year: