A deeper sleep than just dozing! An ambitious plan was made a decade or two ago to build a really big runway for Aishalton, and the South Rupununi. Bulldozers, tractors, and a road layer were brought by the Guyana Aviation Authority. They must have worked for a long time, moving a lot of earth, before they discovered a seam of hard rock running accross the middle of their intended runway. Faced with the decision of what to do about the rock - either blast it all away with dynamite, or build up the runway higher on each side - they retired to think about it.
The bulldozers are gradually rusting into the ground. They will not move earth again.