Venus & Floating Continents

Since Venus is pleasant in the atmosphere and very dense further down, what is the possible of a larger Venus-type planet with lighter materials floating in the upper atmosphere.

Sounds feasible to me especially if the floating continent is of porous or hollow.

Any thoughts?

I don't know how long that would last. Asteroid comes and pulverizes it to dust. After a while the "Continents" resemble dust clouds. But I don't really know. It's certainly a very interesting idea.

The problem is that the pores in the rocks will generally be filled with material from where the rock formed. Since the volcanoes are going to be in the denser lower atmosphere, you're probably not going to get pumice floating up into the air...

It would look awesomely cool though.

I am trying to think of a way to send the rocks in the air.
Lodging it seems to be if there is a hot air underneath or maybe lighter air pockets in the crust or floating crust, or what ever new word would explain it.

As for the rocks coalescing together to form a major mass.
I can only think of 3 things:
1) The rocks gather together from the air currents.
1a) They stick together from ice forming on it.
1b) They stick together from some lifeform or organism growth.
2) Verne Shot, and the rocks manage to stay together and gets lodged.

Magnetism? I suppose they would just flip over.

You might be able to come up with a plausible scenario where rock is floating on a super-dense fluid of some kind.