How the Olmec used bitumen in ancient Mesoamerica

Bitumen, found in abundance in Mesoamerica’s southern Gulf Coast region in natural seeps and in many archeological contexts, is an important economic resource and exchange item that has received little consideration in Mesoamerica. Analyses of archeological, ethnoarcheological, and experimental data provide insights on the organization of bitumen processing activities, and the end product (archeological bitumen), which the Olmec (1200–400 BC) used in the production of many items. Archeological data are derived from investigations at El Remolino and Paso los Ortices— two Early Formative period levee sites in the San Lorenzo Olmec region. Our findings suggest that among the Olmec, bitumen processing was organized as a specialized activity, involving multiple production stages, but not necessarily elite involvement or control.     

Explaining the monopoly in shell-bead production on the Channel Islands: drilling experiments with four lithic raw materials

Significant political and economic developments among the Chumash of southern California were catalyzed in part by the emergence of an intensive, specialist-driven shell-bead industry during the second millennium CE on the Santa Barbara Channel Islands. The production of millions of beads depended in turn on the availability of lithic microdrills of standardized form and materials. Channel Islanders quarried a particular stone type, a blocky Monterey Formation chert, from multiple outcrops situated close to the eastern shores of Santa Cruz Island. Rich archaeological assemblages document the lithic and shell byproducts of these intertwined production systems, each of which endured for several centuries (CE 1150–1819). Islanders invariably chose Island chert for making microdrills: hundreds of thousands of specimens recorded to date are of this material. Furthermore, nearly every microlith in all of Chumash territory (post CE 1150) was produced on the islands; the large populations on the mainland did not participate in microlith making or bead making after CE 1150–1200. We argue that this pattern had its roots not only in the patchiness of key resources and shifting regional social relationships, but also in the physical properties of available raw materials. Here we experimentally assess the properties of Santa Cruz Island chert alongside three important mainland raw materials—Grimes Canyon fused shale, Coso obsidian, and Vandenberg chert—that potentially could have been tapped to make microliths. We test the proposition that Island chert outperforms other lithic materials in drilling efficiency and drill use life. Our experimental results from 108 drilling trials reveal sharp distinctions in performance characteristics across the four materials. We infer that the process by which Islanders became the more-or-less exclusive manufacturers of shell-bead currency in southern California was facilitated by both the efficacy and physical properties of the Island cherts and the propitious locations of the outcrops.     

Craft Production, Exchange, and Political Power in the Pre-Incaic Andes

This article explores the relationship between craft production, exchange, and power in the pre-Incaic Andes, with a focus on recent archaeological evidence from Chavín, Nasca, Tiwanaku, Wari, and Moche. I argue that craft production and exchange in concert with materialized ideologies played vital roles in the development of political power in the Andes. In later state societies, craft production, exchange, and materialization were critical in maintaining and legitimizing established political power.     

Metallurgical ceramics from Mayapán,Yucatán,Mexico

Recent excavations at the Postclassic (AD 1050–1440) Maya site of Mayapán, Mexico, have uncovered a variety of metal objects, metal production debris, and ceramic objects that appear to be linked to metallurgical activities at the site. Our present study investigates a corpus of small ceramic objects to determine if these objects was used in metallurgical processes such as lost-wax casting. A variety of analytical techniques was utilized, including x-ray fluorescence, electron probe, petrography, and reflected light microscopy. Metal residues were detected on the surfaces of several objects, and copper prills were identified within the ceramic fabric, suggesting that the ceramics were exposed to liquid metal during remelting and/or casting events. A comparison of the microstructures of these metallurgical ceramics to typical ceramics from Mayapán demonstrates that the fabrics are very different, and suggests that the metallurgical ceramics were specifically engineered to function in the high temperature environment required for metallurgy. The distribution of metal and metallurgical ceramics across the site of Mayapán suggests that metal production activities may have been more widely distributed and practiced than earlier thought.     

An estimator for bidirectional (naviform) blade productivity in the Near Eastern Pre-Pottery Neolithic B

A method is presented for calculating the blade productivity of bidirectional (naviform) blade cores, a hallmark of Near Eastern Pre-Pottery Neolithic B (PPNB) chipped stone tool assemblages. This approach involves estimating the volume of the core that furnished serial blades, together with the mean volume of a typical targeted blade blank. Simple computation of the volume of a wedge in both instances provides an estimate of the number of targeted blades that were produced in an average single reduction sequence. The method is checked against two replicated bidirectional blade reduction sequences, and a refitted bidirectional blade core from the site of Kfar HaHoresh, Israel. Finally, a case study from Kfar HaHoresh is presented in order to illustrate the application of the method, which may have ramifications concerning the evaluation of incipient craft specialization in the region.     

Earthenware production and distribution in the prehispanic Philippine polity of Tanjay: results from laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS)

This paper presents the results of laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) analysis of low-fired earthenware from the prehispanic trading polity of Tanjay (c. A.D. 500–1600) in the central Philippines. The goal of this project was to determine whether or not the compositional analysis of ceramics could be used to examine the organization of pottery production and exchange relationships in the Bais-Tanjay region of Negros Island. Results indicate that at least five distinct groups of ceramics can be differentiated based on elemental compositions and that pottery production was both a part-time, dispersed endeavor and a full-time, likely centralized, craft. In addition, a number of compositional outliers in the ceramic dataset suggest that interregional trade took place, with pottery made outside the Bais-Tanjay region being imported, especially by upland swidden farmers.     

Ceramic production in ancient Nasca: provenance analysis of pottery from the Early Nasca and Tiza cultures through INAA

We report the results of an instrumental neutron activation analysis (INAA) undertaken on a regional sample of pottery from the Southern Nasca Region. The samples included specimens primarily from the Early Nasca (ca. A.D. 1–450) and Tiza (ca. A.D. 1000–1476) cultures from a total of 16 different prehispanic sites. The results of the analysis demonstrate centralized production of Early Nasca polychromes and decentralized production of pottery from the Tiza culture. The results of this analysis confirm previous conclusions about the organization of these two indigenous cultures of the south coast of Peru and support the hypothesis of an excess production of polychromes at the ceremonial center Cahuachi for Early Nasca, and multiple centers of production for the Tiza culture.     

The Chalcolithic Period of the Southern Levant: A Synthetic Review

In the southern Levant, the late fifth millennium to mid-fourth millennium BC—traditionally known as the Chalcolithic period—witnessed major cultural transformations in virtually all areas of society, most notably craft production, mortuary and ritual practices, settlement patterns, and iconographic and symbolic expression. A degree of regionalism is evident in material culture, but continuity in ceramic styles, iconographic motifs, and mortuary practices suggests a similar cultural outlook linking these sub-regions. Luxury items found in group mortuary caves provide good evidence for at least some inequality in access to exotic materials. The level of complexity in social organization, however, is still debated. Divergent interpretations of Chalcolithic socio-economic organization suggest that, with the large amount of new information now available, a reevaluation of the debate is due. In this article we synthesize the more recent evidence and weigh interpretations of processes that led to the widespread fundamental changes witnessed during the late fifth to early fourth millennium BC.     

传统制瓷工艺对海洋出水瓷器保护修复的研究意义——以宋代景德镇窑青白瓷为例

可移动文物中瓷质文物通常被认为理化性质比较稳定,但海洋出水的瓷质文物因为埋藏环境复杂,常有盐析、附着物、侵蚀等病害。文保工作者在对其保护修复过程中,容易将部分病害与瓷器制作过程中的制作缺陷混淆。为了在清理过程中尽可能保留文物历史信息,系统梳理景德镇窑传统制瓷工艺,对易与病害混淆的典型制作缺陷进行研究与识别,探讨传统制瓷工艺和成分特征对清理方法、修复材料选择方面的指导。从可识别性和耐老化性两方面讨论博物馆展览的瓷器修复尺度,结合实际工作谈瓷质文物保护修复中需要注意的问题,并对日后的实际工作与研究做一些展望。     

大气环境对岭南传统灰塑装饰的危害及相应的保护研究——以广州陈氏书院灰塑为例

本文以全国重点文物保护单位广州陈氏书院内的灰塑装饰为研究对象,针对灰塑的物理化学性质和主要损坏情况,结合广州地区大气环境常年变化情况,分析了大气环境对灰塑装饰的危害,拟定了岭南地区古建筑灰塑装饰保护的全年性和季节性保护措施,在一定程度上填补了岭南地区灰塑艺术在保养和维护方面的空白。