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| | Man-made Subsidence (Site not responding. Last check: 2007-10-15) |
 | | Tenochtitlan was, in effect, built on a giant chinampa in Lake Texcoco, and eventually neighboring islands such as Tlatelolco were annexed, given the same treatment, and amalgamated into Tenochtitlan by causeways built on lake mud. |
 | | Tenochtitlan was as anomalous to the Spanish as Venice would have been: it had canals rather than streets; it had no easily accessible grazing for cattle, sheep, goats, or horses, and it provided no good ground for the style of building that the Spanish were used to live in. |
 | | Although the great earthquakes of Western Mexico are often several hundred kilometers away from the Valley of Mexico, the shape of the valley and its deep load of soft sediment combine to generate shaking of much greater amplitude and duration than one would normally expect. |
| www.geology.ucdavis.edu /~cowen/~GEL115/115CHXXsubsidence.html (5875 words) |
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