Geology question for my friends:

Geology question for my friends:

Pre-amble:

Most of the crust material is light silicates floating on top of the molten iron/nickel core.

With the elements heavier than iron/nickel being sourced from asteroids.

Continental drift is now accepted science. (Every school kid looking at globe independently made the hypothesis that South America and Africa used to be joined.)

My question - going back to say 3.8 billion years - pretty much all of the rocks are still here on the surface?

I know plate subduction buries a some amount of the rocks under another plate (but not actually into the Earth's core). small mount of rock gets ejected into space when big collisions, and another amount of rock gets weathered.

More specifically - what is the survival rate of rocks (by type? by age?) I am unsure what geological terms I should use to search for rock loss rates...

Originally posted on Facebook on March 25, 2019.