In this paper we present the results of the study of 32 projectile points from Hangar site, located in the Salado creek basin (centre of the province of Buenos Aires). Archaeological materials recovered from the site include some isolated human remains, several potsherds, faunal materials, and lithic artefacts. The presence of pottery and small triangular points, together with the radiocarbon dating results, indicate that the main occupations occurred during the end of the Late Holocene. Methodology used included the techno-typological study of the lithic assemblage. Results showed that the outcrops of some rocks present in the sample are found in the Humid Pampas (100-190 km distant from the site) and the Dry Pampas (400-530 km distant from the site). The projectile points show variability in design and size, attributes that have implications for distinguishing different weapon systems (e.g., arrow and dart). In the Pampas region, the Late Holocene is a period characterized by an increasing complexity in hunter-gatherer societies, as it is indicated by long-distance exchange networks and different strategies of intensification and diversification on faunal resources. In accordance with this scenario, we propose that the variability that is observed in the lithic points is a reflex of an increase in the amount of the hunted species in relation with technological innovations such as the introduction of the bow and arrow.

中文翻译：

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萨达多河中部盆地（阿根廷潘帕斯地区）的猎人-收集器武器系统研究的初步结果

在本文中，我们介绍了位于萨​​拉多克里克盆地（布宜诺斯艾利斯省中部）的飞机库站点上32个弹点的研究结果。从该地点回收的考古材料包括一些孤立的人类遗体，数个陶器，动物材料和石器物。陶器和小三角形点的存在以及放射性碳测年的结果表明，主要占领发生在晚全新世末期。所使用的方法包括对石器组合的技术型研究。结果表明，存在于样品中的一些岩石的露头位于潮湿的潘帕斯山脉（距现场100-190公里）和干燥的潘帕斯山脉（距现场400-530公里）。射弹点显示出设计和尺寸的变化，对区分不同武器系统（例如，箭和飞镖）具有影响的属性。在潘帕斯地区，晚全新世是一个以猎人-采集者社会日益复杂为特征的时期，长期的交流网络和不同的动物资源集约化和多样化战略表明了这一点。根据这种情况，我们建议在石质点上观察到的变异性反映了与诸如弓箭的引入之类的技术创新有关的被捕猎物种数量的增加。远程交换网络以及动物资源集约化和多样化的不同策略表明了这一点。根据这种情况，我们建议在岩性点中观察到的变异性反映了与诸如弓箭的引入之类的技术创新有关的被捕猎物种数量的增加。远程交换网络以及动物资源集约化和多样化的不同策略表明了这一点。根据这种情况，我们建议在石质点上观察到的变异性反映了与诸如弓箭的引入之类的技术创新有关的被捕猎物种数量的增加。