31. :: See Carlston Annis Shell Mound and Ridgeway Site, a couple of talk ) 20 : 23, 21 December 2014 ( UTC) 32. Shell rings, along with other shell mounds , have been mined for shell to be used in road paving and other construction projects. 33. Early Okinawan history is defined by midden or shell heap culture, and is divided into Early, Middle, and Late Shell Mound periods. 34. The height and serpentine shape of the shell mounds on the north side of the island indicated use or habitation by earlier civilizations. 35. Among other items of local interest, it houses many Jomon period artifacts, including those from the important Torihama shell mound in the area. 36. In 1657, the site of San Salvador de Mayaca was constructed in present-day Volusia on the existing shell mounds of the Mayaca people. 37. Shell mound hammocks are found on elevated mounds of mollusk shells and aboriginal garbage on which a hardwood, closed canopy forest has developed.38. The shell mound sites that are related to the Chantuto period where located on the mainland side of each lagoon of this Estuary. 39. Residents of and visitors to the Sea Islands of South Carolina and Georgia had long noticed circular shell mounds on some of the islands. 40. Tsuken was settled early in the history of the Ryukyu Islands, as evidenced by its numerous shell mounds , of which three have been excavated.
