File:Lapa-do-Santo-Artefatos-Ponta-projetil-St-5534-Renderizacao-microtomografia.webm
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Lapa do Santo - Artefatos - Ponta projetil St-5534-Renderizacao microtomografia The projectile point (PN: Ls-5534) was recovered in July of 2002 in the level 28 of unit G12 (x=6.013, y=11.686, z=-2.673). When this z-values is applied to the linear regression proposed in section 2 the estimated chronology for the projectile point is 10.0 cal kyBP, ranging from 8.9 cal kyBP to 10.5 cal kyBP within a 95% parametric confidence interval. The projectile point is made out of silicified limestone, using a natural original plaque as a blank. It presents ground technique at one face. This is the most ancient evidence of the ground technique for lithic tools production (at reduction/façonage stage) in Americas to be recorded. The grounding technique is not usual for lithic points production in Brazilian industries, not even at Late Holocene. This projectile point has no technological similarity to the Early Holocene lithic points found at southern Brazil, related to the Umbu tradition industries |
| Date | Unknown date |
| Source | MAE-USP |
| Author | André Menezes Strauss |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 02:59, 5 October 2018 | 40 s, 1,280 × 714 (5.11 MB) | Joalpe (talk | contribs) | pattypan 18.02 |
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