Mounds

Lasting traces of Adena culture are still seen in the remains of their substantial earthworks. At one point, larger Adena mounds numbered in the hundreds, but only a small number of the remains of the larger Adena earthen monuments still survive today. These mounds generally ranged in size from 20 feet (6.1 m) to 300 feet (91 m) in diameter and served as burial structures, ceremonial sites, historical markers, and possibly gathering places. These earthen monuments were built using hundreds of thousands of baskets full of specially selected and graded earth. According to archaeological investigations, Adena earthworks were often built as part of their burial rituals, in which the earth of the earthwork was piled immediately atop a burned mortuary building. These mortuary buildings were intended to keep and maintain the dead until their final burial was performed. Before the construction of the earthworks, some utilitarian and grave goods would be placed on the floor of the structure, which was burned with the goods and honored dead within. The earthwork would then be constructed, and often a new mortuary structure would be placed atop the new earthwork. After a series of repetitions, mortuary/earthwork/mortuary/earthwork, a quite prominent earthwork would remain. In the later Adena period, circular ridges of unknown function were sometimes constructed around the burial earthworks.^[5]

Prominent mounds

Stone tablets

The Adena also carved small stone tablets, usually 4 or 5 inches by 3 or 4 inches by .5 inches thick. On one or both flat sides were gracefully composed stylized zoomorphs or curvilinear geometric designs in deep relief. Paint has been found on some Adena tablets, leading archaeologists to propose that these stone tablets were probably used to stamp designs on cloth or animal hides, or onto their own bodies.^[14] It is possible that they were used to outline designs for tattooing.^[15]

Timber circles

Postholes from a number of timber circles have been found during excavations of Adena culture causewayed ring ditch sites in the Bluegrass region of Kentucky and adjacent regions of Ohio and West Virginia.^[16] A notable example was found by archaeologist William S. Webb during the excavations of the Mount Horeb Site 1 in Fayette County, Kentucky in 1939. Webb discovered a circle of "paired-posts" inside of the embankment ring and ditch.^[17][18] The 48.5 feet (14.8 m) circle was made up of sixty two "paired" post sets and eight single posts.^[19]

Pottery

Unlike in other cultures, Adena pottery was not buried with the dead or the remains of the cremated, as were other artifacts. Usually Adena pottery was tempered with grit or crushed limestone and was very thick; its decoration was largely plain, cord-marked or fabric marked, although one type bore a nested-diamond design incised into its surface. The vessel shapes were sub-conoidal or flat-bottomed jars, sometimes with small foot-like supports.^[20]

Settlement patterns

The large and elaborate mound sites served a nearby scattering of people. The population was dispersed in small settlements of one to two structures. A typical house was built in a circle form from 15 to 45 feet in diameter. The walls were made of paired posts tilted outward, that were then joined to other pieces of wood to form a cone shaped roof. The roof was then covered with bark and the walls may have been bark and/or wickerwork.^[21]

Food sources

Their sustenance was acquired through foraging and the cultivation of native plants.

• Hunted deer, elk, black bear, woodchuck, beaver, porcupine, turkey, trumpeter swan, and ruffed grouse.
• Gathered several edible seed, grasses, and nuts.^[22]
• Cultivated pumpkin, squash, sunflower, goosefoot, and erect knotweed.^{[23][verification needed][24]}

Tools

The Adena ground stone tools and axes. Somewhat rougher slab-like stones with chipped edges were probably used as hoes. Bone and antler were used in small tools, but even more prominently in ornamental objects such as beads, combs, and worked animal-jaw gorgets or paraphernalia. Spoons, beads and other implements were made from the marine conch. A few copper axes have been found, but otherwise the metal was hammered into ornamental forms, such as bracelets, rings, beads, and reel-shaped pendants.^[20]