Question of the Week: How Do Ancient Cities Become Buried?

How do ancient cities become buried? Archaeologists working in modern and ancient cities face the same problems with layers and layers of ancient ruins of cities stacked up like a layer cake over the centuries called stratigraphy. But how does this come to be? Our Archaeology 101 Question of the Week solves this riddle.

This is a new series for Archaeology 101, so if you have a question you've always wanted to know about, please email me today!