In the 2001 Planet of The Apes, at the beginning of the movie, the Oberon space station looks huge. Thousands of years after its crash, its wreckage does not resemble the original space station. The ruin is really small, compared to the size of the space station.
What happened to the rest? I tried to compare the wreckage with the original spaceship. Is the wreckage the very upper part of the space station ?