Effigy Mounds National Monument, Harpers Ferry, Iowa It is not unusual to view, in a national park, works made of dirt. At Ocmulgee, in Georgia, on last year’s trip we saw huge platform and burial mounds, one as tall as fifty feet and bigger than a city block. Mostly, they believed, these mounds served as platforms for the houses of the power and religious elite. Some of them, as digging found, served as burial mounds. And there were a few that were definitely ceremonial lodges where people entered through a dug-out hole into a chamber that was partially underground, and surrounded with thick walls of dirt. Ancient Puebloans, with a different kind of mostly sandy dirt, didn’t create piles of sand, but rather learned to create mud bricks and built elaborate great houses. Although involving more
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