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Rivas is a modern hamlet located in the General River Valley of Costa Rica near the city of San Isidro. The town is positioned 1 kilometer north of where the Rio Buenavista and the Rio Chirripò Pacífico converge to form the Rio General. Rivas is located in the cantón of Pérez Zeledón in San José Province. This town lies south of a mountain chain Cordillera de Talamanca result of tectonic uplift between Cocos Plate and Caribbean Plate. This town is on the way to the Chirripó National Park ==Archaeology== Originally discovered in the 1980s through archaeological surveys of the region by Robert Drolet, the Rivas site is one of 15 Chiriquí Period (AD 750-1500) archaeological sites known within the river valley. Although the site is covered with agricultural plots, numerous cobble house foundations and upright boulders are present throughout the area indicating the presence of an archaeological site. Excavations at Rivas began in 1992 under the direction of Jeffrey Quilter of the Peabody Museum of Archaeology and Ethnology, Harvard University. His excavations identified structures similar to those found by Drolet at the site of Murciélago, Costa Rica. Throughout the 6-year project at Rivas, Quilter identified several residential areas. Construction of these structures consisted of river cobbles aligned in circular patterns of various sizes, typically with adjoining rectangular patios. The smallest structures measured 10m in diameter and the largest were up to 30m in diameter. Additional architectural features including paths, causeways, plazas, and stairways were also recorded throughout the site. It is unclear what function that these structures served within the broader context of the site as a whole. The majority of ceramic artifacts found in these area were shattered and found on the exterior of these structures. Ceramic sherds were rarely found on the interior. This suggests that many of these structures were living areas where refuse pottery was swept outside. Chiriqui period cemeteries located near the site may have corresponded to specific habitation areas within the Rivas population. Burials in these areas had no apparent pattern with regards to their placement and were distinguished by carefully placed river cobbles within a defined area. The quality and quantity of grave goods within these burials indicates a possible status differentiation between the two cemeteries. None of the graves contained gold or tumbaga artifacts. A separate, possibly ceremonial, area was also found at the site. Researchers originally thought that this area was a cemetery site because of the tomb-like concentrations of river cobbles. However, excavations proved that it was neither a cemetery nor a habitation area. A nearby staircase may have connected this portion of the site to the Panteón de La Reina on the overlying ridge. It was therefore concluded that this part of the site was probably an area where rituals were performed in preparation of burial on the ridge. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Rivas, Costa Rica」の詳細全文を読む スポンサード リンク
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