You don't even know what a tsunami is do you. Did you not even se film of the devastating New Year tsunami on television? It may a a relentless wall of water but it is only about 5-10 feet high, it isn't going to lay down hundreds of feet of sediment, especially when some of those sediments are limestones and evaporites.
You really are clueless, why don't you get a beginners guide to geology out of the library and read it?
You are making an exhibition of your ingnorance and I feel emabrassed for you.
This is more waves in general but yes, they can be very high
http://www.surfersvillage.com/surfing/25499/news.htm
1740ft, and this is just caused by a "small" collapse. The real big waves come from super-volcanos or large earth impacts. These probably created waves many miles high traveling at extreme speeds. A wall of water miles high traveling at huge speeds has quite a force, its basically a wall of cement. As it travels over land, it picks of debris only adding to its destructive power. Combine this with the event that caused it, the shaking loose of sediment, and it could very well alter the entire geography of the earth.
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