The time-scale is so long that there are no geological formations that last that long Geologist here, highly skeptical of this statement. Most of the land are

The time-scale is so long that there are no geological formations that last that long Geologist here, highly skeptical of this statement. Most of the land area of each continent has had essentially no seismic/tectonic activity for tens to hundreds of millions of years. With sufficient burial depth (which doesn't have to be super deep, less than a kilometer certainly) there is little reason to suspect that in most areas that haven't been disturbed in 200 million years, they will be disturbed in another 200 million years. The surface of the earth has had cycles of erosion and deposition associated with climate variations (i.e. ice ages) but the effects of these aren't always that deep. This isn't to say that the other issues aren't important--communication of dangers to future humans (or other intelligent creatures) that may not share our language, especially. However it's a social/political problem, not a geological one.