A Reevaluation of PaleoAmerican Artifacts from Jaywamachay Rockshelter, Ayacucho Valley, Peru

Capcha, Juan Yataco; Nami, Hugo G.

doi:10.1080/20555563.2016.1199198

Cited by 16 publications

(7 citation statements)

References 22 publications

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“…Regarding Fell points, the oldest OSL age at Los Molles is concordant with the dates obtained in other South American localities (11,000–10,000 radiocarbon BP; Maggard and Dillehay 2011; Nami 2007, 2017a; Nami and Stanford 2016; Waters et al 2015; Yataco Capcha and Nami 2016). At Urupez II, in southern Uruguay, artifacts including Fell points were recovered from a reddish pale brown paleosoil formed on the Dolores Formation (Meneghin 2004), and yielded radiocarbon dates ranging between ~10,700 and 12,000 radiocarbon years BP (Meneghin 2015).…”

Section: Discussionsupporting

confidence: 86%

“…Dated stratigraphic records indicate that fishtail points are roughly coeval with Clovis (Gruhn and Bryan 1977; Maggard and Dillehay 2011; Nami 2007; Nami and Stanford 2016; Yataco Capcha and Nami 2016). Because of fluting, some have seen them as derivative of Clovis (Morrow and Morrow 1999), but most South America researchers conclude that they are technologically distinct in both morphology and reduction sequence (Borrero 2006; Nami 1997; Politis 1991).…”

Section: Archaeological Importance Of Uruguaymentioning

confidence: 99%

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Luminescence Dating of Late Pleistocene and Holocene Sediments in Uruguay

Nami

2018

Latin Am. antiq.

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The archaeological record in the Negro River in central Uruguay Republic is remarkable for its richness, including the presence of a significant number of Paleoindian fishtail points. As part of ongoing research on the earliest human occupations in this region, luminescence dating is applied to develop a terminal Pleistocene-Holocene regional chronology. Eight ages were derived from six samples taken from sedimentary fluvial deposits from two sites near the city of Paso de los Toros. The resulting dates span 11.8 and 1.04 ka corresponding to the Late Pleistocene and the whole Holocene. Because the chronology of the sedimentary sequences spanning these ages is poorly known, the presented results become a significant contribution to the construction of a chronostratigraphy sequence in the area. The results also show how single-grain dating can distinguish different components of mixed assemblages.

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Section: Discussionsupporting

confidence: 86%

Section: Archaeological Importance Of Uruguaymentioning

confidence: 99%

Luminescence Dating of Late Pleistocene and Holocene Sediments in Uruguay

Nami

2018

Latin Am. antiq.

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“…Under the binocular microscope, the obsidian debitage (translucent or black and glassy luster) can be easily distinguished from the rhyodacitic and dacitic glasses (dark and greasy luster). The Los Notros and Pilauco obsidian artifacts and debitage might represent the oldest finding of this raw material from late Pleistocene South American archeological sites (Los Tapiales site—Gruhn, Bryan, & Nance, ; El Inga site—Mayer‐Oakes, ; Salar de Punta Negra site—Núñez & Grosjean, ; Cunchaica site—Rademaker et al, ; Jaywamachay site— Yataco Capcha & Nami, ; Quebrada Jaguay site—Jones, Hodgins, & Sandweiss, ). Its identification as foreign raw material in Pilauco would exclude any pseudoartifacts ( sensu L. A. Borrero, ), as the movement of obsidian (and any glass rock) boulders through the glaciers is impossible (Grebennikov et al, ).…”

Section: Discussionmentioning

confidence: 95%

The procurement and use of knappable glassy volcanic raw material from the late Pleistocene Pilauco site, Chilean Northwestern Patagonia

et al. 2019

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In this study we used a multidisciplinary approach, coupling morphological, geological, geochemical, and statistical analyses to investigate the provenance of rhyodacitic and dacitic glass knapped at the Pilauco site (40°34′11” S, 73°06′17” W; 13,570 ± 70–12,540 ± 90 14C year BP) in northwestern Chilean Patagonia. A morphotechnological analysis was performed on the entire lithic assemblage, which is composed of cores, retouched and unretouched unifacial flakes, and small pieces of debitage, some of them closely associated with Notiomastodon aff. N. platensis gomphothere bones. Sixty‐two archeological and geological samples were analyzed by inductively coupled plasma mass spectrometry revealing a wide range of basaltic to rhyodacitic compositions. The archeological knappable dacitic and rhyodacitic glasses were recovered from pebbles deposited mainly on a beach away from the site, as deduced by the presence of minute and dense crescentic percussion marks on the cortexes. Geochemical trace element analysis suggests that the Puyehue–Cordón Caulle Volcanic Complex is the most likely source for the volcanic glass artifacts at Pilauco. The new morphotechnological and provenance record and improved stratigraphic sequences highlight the Pilauco site as an important contribution for the diversity of the South American geoarchaeological context.

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“…Provenance analysis of a significant number of samples ( n = 65) exhumed in some of these sites was previously performed using NAA and XRF analysis. The oldest data regarding the use of this rock by regional settlers comes from the lower levels of Jaywamachay rockshelter dated to 10,280 ± 170 14 C yr bp (I‐5699) or 12,548–11,325 cal yr bp in its lower occupation (Yataco Capcha and Nami ). From this site, the analysis of 28 obsidian specimens indicated that the totality comes from the Quispisisa source (Burger et al .…”

Section: Discussionmentioning

confidence: 99%

“…; Rademaker et al . ; Yataco Capcha and Nami ), continuously through pre‐Columbian times to contemporary Andean agro‐pastoralist societies (Burger and Asaro , ; Brooks et al . ).…”

Section: Introductionmentioning

confidence: 99%

XRF obsidian analysis from Ayacucho Basin in Huamanga province, south‐eastern Peru*

et al. 2020

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Obsidian was broadly used along the Andean Cordillera in South America. Particularly in Peru, its use can be traced to the earliest human occupations, continuously through pre‐Columbian times to contemporary Andean agro‐pastoralist societies. In order to distinguish the provenance of obsidians from Peru, this paper reports a new X‐ray fluorescence (XRF) analysis on several obsidians obtained in surface collections of the Ayacucho region. The analysis and source determination were made by XRF on 52 specimens. The source assignments involved comparisons between the compositional data for the specimens and the University of Missouri Research Reactor (MURR) XRF obsidian database for sources in Peru. After analysing the samples, obsidian sources were recognized and documented. All had small nodules not larger than about 4 cm. They were recovered from Ñahuinpuquio and Marcahuilca hill which belonged to the previously identified Puzolana source. Another identified source was the well‐known Quispisisa, located 120 km south of the city of Ayacucho, and distributed through a vast region in central Peru. The results expand previous observations made on the obsidian provenance at Ayacucho Basin, as well as the extension of the Puzolana source between Yanama and Huarpa hills, south of Ayacucho city.

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A Reevaluation of PaleoAmerican Artifacts from Jaywamachay Rockshelter, Ayacucho Valley, Peru

Cited by 16 publications

References 22 publications

Luminescence Dating of Late Pleistocene and Holocene Sediments in Uruguay

Luminescence Dating of Late Pleistocene and Holocene Sediments in Uruguay

The procurement and use of knappable glassy volcanic raw material from the late Pleistocene Pilauco site, Chilean Northwestern Patagonia

XRF obsidian analysis from Ayacucho Basin in Huamanga province, south‐eastern Peru*

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