English: Photograph by the Public Lands Institute. Site: Seip Earthworks, Ohio. Managed by Public Law 102-294, May 27, 1992. Geological age: ~425 Mya Silurian dolomite (Peebles Dolomite, Tymochtee Dolomite); earthworks constructed on Pleistocene glacial outwash terrace above Paint Creek at the maximum extent of both the Illinoian and Wisconsinan glacial advances. (Late Silurian (Ludlovian).). Hydrology: North bank of Paint Creek, a 94.7-mile tributary of the Scioto River draining 1,143 sq mi of south-central Ohio. Indigenous territories: Adena (c. 1000 BC-100 AD) and Hopewell (c. 200 BC-500 AD) cultures; Seip lies within the densest 20-mile corridor of Hopewell monumental earthworks on the continent, running from Bainbridge to Chillicothe along the Paint Valley; Chalahgawtha (principal-town) division of the Shawandasse Tula (Shawanwaki/Shawnee) held the Paint Creek valley as the principal Shawnee territorial corridor; documented Chalahgawtha town at Frankfort on Paint Creek in Ross County; Myaamia (Miami) co-held south-central Ohio; Shawnee and Miami lands ceded via Treaty of Greene Ville (August 3, 1795), Article 3 boundary and Article 4 relinquishment; Shawnee removed west via Treaty with the Shawnee 1831 under Indian Removal Act 1830.. Notable species observed: Goldenseal, bloodroot, Eastern Tiger Swallowtail, ashy sunflower, Rosy Maple Moth.