We had already learned how these ancient people went from hunter gatherers to settlement builders, but at Mesa Verde we saw the evolution of their building techniques. The first houses were built underground with mud walls and timber ceilings. Mud was eventually replaced by rock and mortar. Finally, multi level multi room above ground buildings were developed with very thick walls, almost mimicking the underground nature of the original mud huts. The ceremonial kivas remained underground and were an important feature in every village. Most villages had one large grand kiva with many secondary smaller ones.
This underground nature, whether actually underground or in thick walled buildings makes sense in the desert climate. Temperatures underground naturally stay relatively stable even during the hot summer days and cold winter nights.
It is interesting how some villages incorporated the cliffs and caves into their villages. There were no cliffs at the Aztec Ruins, so the village consisted of one large multi storied multi roomed building, a grand kiva and several small kivas, and a large open plaza.
Bandelier had both cave dwellings and a settlement. The Gila cliff dwelling and the Mesa Verde cliff dwellings built elaborate villages right into the cliffs. What all the areas had in common was that the pinnacle of their civilization was between the years 1100 and 1200.AD.
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