The oceans are mobile, the ground is also mobile, but to a far lesser extent. The earth also gives way to any other pressure like oceans. The more mobile mass which is water will and can dominate the land.
Any such mobility would have been a cataclysm that would have killed all life forms without the need for drowning them.
The motion you are proposing has no way to increase the mean sea level to +8846 m, the amount required to cover Mt Everest.
Let's talk about volume. For a sphere, V = (4/3) π r³.
Earth radius = 6378 km, V = 1.08678129254289E+21 m³
Earth+Everest radius = 6386.848 m³, V = 1.09131054315458E+21 m³
difference = vol. of water req'd = 4529250611688110000 m³
Where does this water come from? It has to be added to the water already abounding in the oceans, lakes and rivers, no matter how you shake it or bake it.
Of course it's just a myth, and it's silly to be taken to task to calculate this, but, as I said before, numbers are our friends.
The Bible said it rained for forty days and nights. Divide by 40 and you get:
V = 113231265292203000 m³ / day.
Another way to think of this is that every single point on earth was standing under a column of evaporated water which, upon condensing, would reach 8848 m to the top of Everest. In each of those 40 days, 221 m of water have had to have condensed and fallen on every point on the planet. It's of course impossible for more reasons than we've begun to discuss. Maybe these numbers will help you a little to begin to get your arms around the physical impossibility of such a nutty idea.
Let's begin with the notion that every square meter of the planet supported a column of 8848 m of evaporated water. Ignoring the impossibility, let's calculate the impossible pressure bearing down on the world before the impossible condensation would have had to have taken place. It's so huge a pressure that everything would have had to have been crushed, and there would be no need for a flood. Poor Noah (Utnapishtim, of course, from the earlier myth) and all his impossible collection of life forms would have been crushed. Even if they all were wearing Iron Man suits, they couldn't support the weight. 8848 m³ of water x 1,000 kg / m³ = 8.8 million kg per sq meter of pressure. That's about 867 times the atmospheric pressure. In other words, it's like being near the bottom of the Marianas trench without a pressure vessel. It's almost 6 times the pressure at the Macondo well where BP couldn't send people in a bathysphere. Imagine, if you couldn't join some pipe under 1/6th the pressure in a bathysphere how hard it would be to undertake to build a wooden ship the size of the Titanic, much less to round up even your own herd, which is millions of species less than the total roundup, and to do all of this at 6 times the pressure at Macondo. Imagine being exposed without a protective bathysphere under 867 atmospheres, even if all you had to do was sing "What a Mighty Fortress in Our God" (in Akkadian, of course). Every living cell would simply implode and no work would get done and there would be nothing left to round up.
And, of course, the last few tons of water evaporating into the air from the impossible nonexistent water source would have had to have overcome 867 atmospheres to evaporate in the first place. It's so ludicrous that I can only dream of meeting all the people in the world who believe this, only so I can sell them shares in the Brooklyn Bridge. And if you actually believe this, Gerhard Kemmerer, then I've got a bridge for sale for you, too.
When we get to the temperatures at which the last ton of water would have needed to have been raised, to overcome the 867 atmospheres of pressure, we'll see that, besides being crushed, everything would have had to have been boiled. It remains to be seen what the wormwood of that sorry boat would have been reduced to. Probably limp cellulose. Somewhere inside might be some clumps of pulverized boiled bone tissue as the only evidence that people and animals were on board. And maybe some traces of hair, feathers and scales. I doubt if much of any other tissues would be recognizable. And of course all traces would have been dispersed in the torrent of water pouring down on the limp parboiled cellulose "boat", in an amount that would have been needed to raise the water level 221 m per day. The first rain drops would have had to have occurred at the peak of pressure, sometime after the temperature had dropped from parboil to who knows what. When we look at the critical temperature and pressure for water, we will discover that it simply is impossible to transition from vapor to liquid under any conditions that support this ludicrous belief.
To get a picture of what I'm talking about, imagine "sitting" near the bottom of the Marianas Trench with a balloon you've inflated to 867 atmospheres. Inside this balloon is a pot of water. You need to boil this water to make it evaporate. Let's calculate the temperature required to do so. (I'll leave that for a future exercise but I assure you it's far above the normal boiling point of water, so everything on Earth would have had to have been in a pressure cooker in order to get the evaporation to take place).
The impossible water source is the original 8848 m of water that was needed to fully evaporate in the impossibly hot climate only to hang suspended in the atmosphere as steam while Noah (Utnapishtim) was boat building the impossible boat that could hold the impossible menagerie collected during an impossible roundup. It says the Earth was flooded up past Everest before the story begins, i.e., all life appeared on Earth when it was a Water World, where the impossible Creation Myth paradoxically imposes a Garden of Eden and people running around uncircumcised, being bad and getting turned into impossible pillars of salt. All by impossible magic. Of course we could try to rewrite the story to make it take place in the impossible city of Atlantis which is actually more plausible if you at least get the Atlanteans to build an impossibly huge bathysphere over the city before it is submerged under the crush of 8848 m of water.
Plastic earth and relative viscosity have nothing on the absurdity of assuming Noah was working under 867 atmospheres, in a steam pressure cooker that miraculously chilled itself rapidly (within his putative lifetime) which was necessary to give the conditions before the rainfall, that is, that places like Canaan (Mesopotamia for Utnapishtim) -- the settings of the stories -- could ever be on dry ground. And for all of this to happen we can also try to calculate the impossibly huge energy transitions that would have to have had to have occurred, which exceed the available solar radiation from the sun during absorption, and the rate of heat dissipation through the atmosphere back out into empty space by radiation during condensation, even if the sun impossibly went dark in order to assist in getting the impossibly parboiled planet to cool down. Impossibly parboiled Noah was working in the impossibly dark planet building an impossible boat to carry an impossible menagerie after an impossible roundup, all in the dark, at 867 atmospheres of pressure, under an impossibly saturated sky loaded with moisture from an impossible earlier Water World.
I suppose you believe some bearded scribe in a robe and sandals was taking notes while all of this impossible stuff was going on. Of course he was Sumerian, not a Canaanite, and he used a stylus to poke cuneiform wedges into clay which he later baked in a kiln. That much we know for sure, and it's certainly within the realm of possibility. In fact, I'd go so far as to say it's just about the only element of truth in this whole parade of ridiculous ideas.
It is very difficult to envisage what I have posted
Oh, no, it's very easy to envisage it, steam technology has been around a long time.