Anderson Mounds, part of Mounds State Park and, located near Anderson, Indiana, is a burial site that developed out of the Hopewell culture. These earthworks were created as a dedication to the Sun God and Earth Mother, and the mounds were used as gathering places for religious ceremonies as well as viewing astronomical alignments. The Great Mound is the largest of the ten earthworks in the Mounds State Park, and its construction dates back between 250 and 160 B.C. The three floors of the Great Mound were created by a repeated process that included adding a layer of subsoil, burning the ground, then covering the floor in a layer of powdered white calcite, made from bone, shell, and limestone. This gave the floor a clay consistency as well as deep purple color. Each floor had basins and pits of unknown purposes, however near the gateway of the mound platform, a large pit was found containing various artifacts. These artifacts included chipped stone, flakes, burned bone, a fragment of shell, fragments of mica, and burned clay chunks. Built above this pit was a log tomb, called so because the floor of the tomb was laid with logs. When excavated, two human burials were found inside the tomb; a 50-year-old adult male, and the redeposited partial remains of a cremated individual. Also, artifacts such as a limestone platform pipe, flakes, fire-cracked rocks, mica fragments, pottery, burned and unburned bone, and seven deer bone awls were found in the tomb. 100 years after the mound was started, the construction of the Great Mound's platform was started. Although the embankment appears random and irregular, it was actually carefully crafted. The only other aboriginal features on the platform were numerous small post holes encircling the top. These holes most likely held a brush fence erected to hide activities carried out on the platform. After the mound was completed, several more pits were dug, some of them spanning from the surface to the lowest floor. One pit was possibly looted, while two other pits contained human burials. No other artifacts were found in these pits. (Cochran, McCord, 2001), (Vickery 1970).
One issue archaeologist faced when working at the Anderson mounds was the maps that had been used since the late 1800s; appearing to be accurate, but research showed that the earthworks had been misrepresented in the map. This issue is significant since it affects the context of the site. Archaeological surveys of the park have shown that people have used the land for about 10,000 years, beginning back as early as 8000 B.C. and continuing through about 1400 AD. Considering how many years this site has been used, the condition of the earthworks that were discovered is stunning. The earthworks are in pristine condition, although now due to the state park, they are facing a greater challenge to continue keep them in that condition. One of the most known styles is the circular earthwork. There are believed to be 8 in the park, but only 4 are visible today. Another defining feature is the "great mound" this mound is 350 ft long, 60 ft wide, and 10 ft deep. This feature is the most prominent mound in the park, and is so large that another mound appears to be visible, however, this is known as the "small knoll". This was used for rituals and has been targeted by looters in the past, which caused significant damage to the artifacts. These rituals, as estimated by radiocarbon dating, began around 250 B.C. Another feature of this site is the fiddleback enclosure. Even though there have not been any observed astronomical activities here, it does mark the spot where the sun sets on the summer solstice.