Emerald Mound included a 30 foot secondary mound that once supported a temple containing sacred Indian images, and archeological evidence indicates that at least two small mounds stood along the north and south sides of the primary platform, possibly supporting wood structures plastered with clay. Using primitive tools of wood, stone, and bone, Indians loaded dirt into baskets or skins and carried it on their backs or heads. The great platform served as a base for temple mounds and is also believed to have provided a plaza for ceremonies and games. Archeological tests in 1949 indicated that this platform mound was constructed in several stages, as Indians began with a natural hilltop, leveled it, and gradually transformed it into a flat-topped pyramid by adding thousands of tons of earth from near the base. On important occasions, the mound was the scene of elaborate civic processions, ceremonial dances, and intricate and solemn religious rituals where worshipers sought favor of their gods.