During the construction of modern-day Mexico City's subway system, a wealth of archaeological material was unearthed, revealing remains of the ancient Aztec capital of Tenochtitlán. In addition to being just one instance of accidental discovery in the area, this is also an example of the archaeological concept of

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The concept of superposition refers to the layering of archaeological sites, where newer layers are deposited over older ones. The discovery of Aztec remains beneath modern-day Mexico City illustrates this principle, as the ancient city lies beneath the contemporary one.

During the Construction of Modern-Day Mexico City's Subway System, a Wealth