| Grand Gulf Mound (22 CB 522) | |
| Location: | Port Gibson, Mississippi, Claiborne County, Mississippi,  United States |
| Region: | Claiborne County, Mississippi |
| Built: | 50CE |
| Abandoned: | 200 CE |
| Epochs: | Woodland period |
| Cultures: | Marksville culture |
| Architectural Styles: | Burial mound |
| Notes: | Responsible body: private |
| Precolumbian: | yes |
The Grand Gulf Mound (22CB522) is an Early Marksville culture archaeological site located near Port Gibson in Claiborne County, Mississippi, on a bluff 1miles east of the Mississippi River, 2miles north of the mouth of the Big Black River.[1] The site has an extant burial mound, and may have possibly had two others in the past. The site is believed to have been occupied from 50 to 200 CE. Copper objects, Marksville culture ceramics and a stone platform pipe were found in excavations at the site. The site is believed to be the only site in the Natchez Bluffs region to have been actively involved in the Hopewell Interaction Sphere.[1] It is one of four mounds in the area believed to date to the Early Marksville period, the other three being the Marskville Mound 4 and Crooks Mounds A and B, all located in nearby Louisiana.[2] The mound itself was built in several stages over many years, very similar to the Crooks Mound A in La Salle Parish, Louisiana. Unlike some other Hopewell sites, such as the Tremper Mound in Scioto County, Ohio, the site showed no evidence of a mortuary or communal structure previous to the construction of the mound. The beginning stage is believed to have been a rectangular earthen platform 0.5feet in height, 20feet wide on its east–west axis and 3.5feet long on its north–south axis. After a period of use, this platform was covered with a mantle of earth 5.5feet in height and 26.5feet wide along its east–west axis, with an extremely hard cap of earth 0.2feet covering the mound. During a third stage another mantle of earth was added to the mound, bringing it to a height of 10feet and to approximately 32feet in width on its east–west axis.[1]