Who First Excavated Stratigraphically?

North American Indians left few monuments of their civilization. Early European explorers and settlers in North America found no stone cities or defense walls or water systems or monumental structures built by the native Americans. The only exceptions were large earthen mounds obviously built by humans rather than formed by natural forces. Some of these mounds were shaped like large round hillocks. Others were shaped like truncated pyramids. Still others had the form of animals or birds. Many had large trees growing on top of them, attesting to their great age. Some were made of earth; others were constructed […]