Why are dinosaurs buried so deep? Did rock form over them?
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To understand this a bit easier, take a look at older (50+) neighborhoods in your area. You’ll often see that sidewalks are sunken into the yard. However, it is actually the opposite. The grass clippings, dust from the sky, dead microorganisms, and the like have becomes new layers of dirt and the yard has slightly risen from when the concrete was first poured.
Repeat this for 100s of millions of years and you get layers of sediment that turn into rock. Dinosaurs are less buried than they were covered over and over again.
A similar process happens with human ruins. The tall stuff falls down and what remains is covered over time with plant matter, dust and dirt, which eventually completely covers the ruin. It turns a former building into a small hill or a grassy depression.
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