I’ve been traveling around the UK, visiting lots of ancient sites, and I don’t understand how these places end up buried under so much dirt. I know that sometimes thousands of years pass between when something is abandoned and when it’s rediscovered, but how does that much dirt and debris cover things up over time? Can someone explain how this happens?
In: Planetary Science
In cities, people just keep building on top of what’s already there. They throw their rubbish into a yard/dump, so when that is built on its higher. Manure gets trodden into the dirt streets so they get higher.
Rurally, most of it’s not that deep, farmers pretty regularly trash the stuff down there with ploughs. Any useful material was used elsewhere, the rest knocked down and plowing covered it with dirt.
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