Moving sources: A preliminary study of volcanic glass artifact distributions in northeast China using PXRF

Recent studies have highlighted the long-distance transport of obsidian from the Paektusan (Tianchi or Baitoushan in Chinese) volcano on the border between China and North Korea to eastern Russia and Korea, but little is known about the role of the local population in the production and movement or exchange of this important raw material. This paper addresses this data lacuna by presenting sourcing results of 440 artifacts from 18 Late Paleolithic sites located in northeast China. A portable XRF enabled rapid non-destructive characterization of samples. The results show that although Paektusan obsidian was widely transported throughout northeast Asia, material from at least three other sources was also used. In particular, we highlight the significance of basaltic glass artifacts with the same geochemistry as sources found in the Primorye region of Far East Russia in sites from northeast China. This result indicates a two-way movement of volcanic glass artifacts between Primorye and the northeast of China rather than a unidirectional long-distance exchange system originating from Paektusan Volcano.     

The Distribution and Research Value of Archaeological Mussel Shell: An Overview from Mississippi

Abstract

Archaeological mussel shell rarely has been employed beyond paleodietary analysis in eastern North America, and most published work is site-specific in nature. Broad-scale syntheses of data on freshwater mussel shells are needed to realize the research potential of this common archaeological material. Such syntheses should also reveal gaps in our knowledge and perhaps illuminate reasons for why such gaps exist. In this paper, data on freshwater mussel shells from sites in Mississippi are gathered, and broad patterns in temporal and spatial distributions as well as site structure are discussed. The spatial data clearly suffer from survey, recovery, analytical and reporting biases, while data on temporal trends and site structure are lacking or are available at only gross levels. Given that shell data can be used in a number of research areas (e.g., biogeography, paleoenvironment, chemical sourcing, measurement of environmental disturbance), such unsystematic treatment of shell remains is unwarranted and should be corrected.     

Prehistoric shell beads on the Georgia coast

ABSTRACT

The prehistoric peoples living along the Georgia coast fabricated and used shell beads for millennia. Out of a number of mollusk species inhabiting the region, only a few were selected for the fabrication of beads. The knobbed whelk (Busycon carica) was the most common species used, and it represents the most common whelk found in Atlantic coastal waters. The lightning whelk (Busycon sinistrum), the second most common whelk in the region, was occasionally used in the production of beads. Small numbers of beads were made from marginella and olive shells and, rarely, from bivalve species. Small beads were manufactured from the body whorl of whelks, while larger beads were fabricated from whelk collumella. Shell beads appear in small quantities in Late Archaic period contexts, and then almost disappear during the Woodland period. Beads reappear in quantities at about AD 800 in the Early Mississippian period. More shell beads have been recovered from Mississippian period archaeological contexts along the northern Georgia coast than along the southern coast, reflective of cultural differences between these two geographic areas in the post-Woodland period era.     

Microbiology of Concretions, Sediments and Mechanisms Influencing the Preservation of Submerged Archaeological Artifacts

Research conducted at deep-ocean ship wreck sites in the North Atlantic Ocean, the Mediterranean Sea and in the Gulf of Mexico have revealed that microorganisms play a significant role in both the preservation and loss of submerged artifacts. Research to be reported concentrates on the influence of microbiologically induced concretions on the survival of maritime artifacts. Rusticles, a common form of concretion, have been found to provide valuable information to archeology (Garzke et al. 1997, Proceedings of the Society of Naval Architects and Marine Engineers). The role of rusticles in the preservation of recalcitrant materials such as coal and glass fragments that become embedded within these growths, as well as forensic chemical analysis can be used to determine the nature of goods or munitions being carried by the ship at the time of its sinking, and will form examples.     

From flow to quarry: magnetic properties of obsidian and changing the scale of archaeological sourcing

Previous studies have endeavored to use petrophysical traits of obsidian, particularly its magnetic properties, as an alternative to conventional geochemical sourcing, one of the greatest successes in archaeological science. Magnetic approaches, however, have not seen widespread application due to their mixed successes. In a time when geochemical analyses can be conducted non-destructively, in the field, and in a minute or two, magnetic measurements of obsidian must offer novel archaeological insights to be worthwhile, not merely act as a less successful version of geochemistry. To this end, we report the findings of our large-scale study of obsidian magnetism, which includes 734 geological obsidian specimens and 97 artifacts measured for six simple magnetic parameters. Based on our results, we propose, rather than using magnetic properties to source artifacts to a particular obsidian flow (inter-flow sourcing), these properties are best used to differentiate quarrying sites within an individual flow (intra-flow sourcing). Our results also demonstrate that certain magnetic properties are highly affected by ancient knappers' material selection criteria. Furthermore, depending on the spatial scales of variation, which likely vary from flow to flow, we envision several potential applications of this approach, including integration into minimum analytical nodule analysis (MANA). Magnetic data appear to shift the scale of obsidian sourcing from flows to quarries and, in turn, enable new insights into raw-material procurement strategies, group mobility, lithic technology, and the organization of space and production.     

Comparison of XRF and PXRF for analysis of archaeological obsidian from southern Perú

Chemical sourcing is becoming an increasingly important component of archaeological investigation. Instruments used for elemental analysis generally must be operated in a controlled laboratory environment. Further, many methods require destruction of a small portion of the objects under investigation. These facts inhibit the application of chemical sourcing studies in a number of research contexts. Use of portable non-destructive instruments would resolve these issues. Sixty-eight obsidian artifacts from the site of Jiskairumoko, in southern Perú, were examined by X-ray fluorescence spectrometry (XRF) and portable X-ray fluorescence spectrometry (PXRF). Results were compared for consistency in terms of source determination and individual element concentrations. Both instruments determined that the same sixty-six artifacts derived from the Chivay obsidian source and both identified the same two artifacts that could not be assigned to source. Individual element comparisons showed significant differences, but these can be resolved through instrument cross calibration, and differences had no bearing on source identification. PXRF was found suitable for determining obsidian sources in southern Perú and for identifying specimens that require more sensitive analytical methods such as, instrumental neutron activation analysis (INAA). Regular use of Chivay at Jiskairumoko suggests consistent trade relationships developed during the Archaic.     

Development and evaluation of geochemical methods for the sourcing of archaeological maize

Strontium (Sr)-isotope values on bone from deer mice pairs from 12 field sites in the Chaco Canyon area, New Mexico, were compared with isotope values of synthetic soil waters from the same fields. The data indicate that mice obtain Sr from near-surface sources and that soil samples collected at depths ranging from 25 to 95 cm contain Sr that is more accessible to the deep roots of maize; thus, synthetic soil solutions provide better data for the sourcing of archaeological maize. However, the Sr-isotope composition of mice may be more valuable in sourcing archaeological remains of animals such as rabbit, turkey, and deer.     

The Midcontinental Journal of Archaeology 2003–2005: A Retrospective

Abstract

Archaeologists have long recognized that the Hopewell period was marked by the movement of exotic raw materials and artifacts across the eastern United States. The use of archaeometric techniques to trace the sources of these materials is well established. However, little work has been done on sourcing the pipestone used in Hopewell pipes. In this research we use Portable Infrared Mineral Analyzer (PIMA) technology to identify the presence of Minnesota catlinite as a raw material used for pipes recovered from the Tremper Mound (33SC4) caches in the Scioto Valley of Ohio. A new radiocarbon date places the deposition of these caches between B.C. 50 and A.D. 79. The presence of catlinite pipes in Ohio and in Wisconsin, but rarely in Illinois, suggests the existence of a direct west-to-east route from the catlinite quarries through Wisconsin to Ohio. This movement of catlinite appears to have been a short-term Hopewellian event and the material was not used again until late prehistoric times.     

Tremper Mound,Hopewell Catlinite,and Pima Technology

Abstract

Archaeologists have long recognized that the Hopewell period was marked by the movement of exotic raw materials and artifacts across the eastern United States. The use of archaeometric techniques to trace the sources of these materials is well established. However, little work has been done on sourcing the pipestone used in Hopewell pipes. In this research we use Portable Infrared Mineral Analyzer (PIMA) technology to identify the presence of Minnesota catlinite as a raw material used for pipes recovered from the Tremper Mound (33SC4) caches in the Scioto Valley of Ohio. A new radiocarbon date places the deposition of these caches between B.C. 50 and A.D. 79. The presence of catlinite pipes in Ohio and in Wisconsin, but rarely in Illinois, suggests the existence of a direct west-to-east route from the catlinite quarries through Wisconsin to Ohio. This movement of catlinite appears to have been a short-term Hopewellian event and the material was not used again until late prehistoric times.     

Distinguishing Nemrut Dağ and Bingöl A obsidians: geochemical and landscape differences and the archaeological implications

Distinguishing the geochemically similar Bingöl A and Nemrut Da? peralkaline obsidians is a major challenge in Near Eastern obsidian sourcing. Despite abundant claims in the literature otherwise, this study reveals that Bingöl A and Nemrut Da? obsidians are distinguishable with adequate source sampling and highly accurate and repeatable data for geochemically important elements. Earlier research has endeavored to link a simple geochemical trend (peralkalinity) to specific locations at Nemrut Da?, but existing schemes to distinguish Bingöl A and Nemrut Da? obsidians cannot validly link compositional clusters to the landscape. This study demonstrates that additional elements are required to attribute artifacts to specific obsidian-bearing lava flows at the volcano. Limitations of this newly analyzed collection of geo-referenced Nemrut Da? and Bingöl specimens suggests caution is still warranted in sourcing peralkaline obsidians, but a few archaeological implications are clear. New sourcing results from Tell Mozan in northeastern Syria refute a widespread assumption that one can use maximal efficiency to deduce whether peralkaline obsidian artifacts originated from Nemrut Da? or Bingöl A. The ability to discern among these sources also enables inquiries into issues of cultural and technological preferences regarding these obsidians.     

Exchange economies of late prehistoric eastern Sonora,Mexico: A re-evaluation based on provenance data analyses

This paper presents provenance data on mundane and rare artifact classes from eastern Sonora in order to revise interpretations of the political economy of late prehistoric Northwest Mexico. Previous researchers have argued that long-distance exchange was a predominantly elite activity utilized to generate economic wealth as a means to political ascendance. Data presented in this analysis contradict these previous models and indicate that all segments of society employed exchange to forge relationships for diverse reasons. Aspiring leaders rarely utilized unequal access to regionally acquired goods to attract local supporters. There is no evidence that foreign objects or symbolism imported from Mesoamerica were a component of aspirant leader strategies. Commoner households exchanged mundane artifacts to bank social capital with groups unlikely to undergo simultaneous social depredations. Overall, exchange and other data indicate a fairly balkanized landscape with few signs of elite offices.     

Analysis of the Gulf of Mexico’s Veracruz-Havana Route of La Flota de la Nueva España

During colonial times, an active maritime trade existed between Spain and the New World, with convoys sailing annually to and from Mexico and returning via Havana, Cuba, after wintering in America. A database constructed from secondary and open sources revealed that Spanish vessels were sailing over open waters along a northern path near Louisiana and a southern path across the central Gulf of Mexico. These routes were traversed in about one month and scheduling for the convoy was based on an understanding of the Americas’ meteorological and oceanographic climate. However, other factors may also have been involved in the directional layout of the routes. Today these ancient routes crisscross planning areas for oil and gas lease sales in the US Exclusive Economic Zone and the information presented in this article may aid in identifying areas where historic shipwrecks may lie. Maps and documents found during this study helped piece together the evolution of our understanding of the Gulf of Mexico surface circulation and how this knowledge influenced sailing during colonial times.     

After the Fanfare: Education,the Lasting Legacy

Shipwrecks are resource rich. The recent Gulf of Mexico Deep Gulf Wrecks Project was meant to be shared and explored, not only by professional scientists but also by the public. The project website was the public link to the deepest reaches of the Gulf of Mexico during the scientific expedition. The website welcomed hundreds of visitors each day during the project. The audience composed of professionals and interested public followed the daily logs and videos. The overall scientific and educational data sets amassed from the project were, at times, overwhelmingly vast, but when segmented by topic, became manageable. After the fanfare generated by following along with the expedition ended, the primary project goals shifted to analysis and the creation of a lasting educational legacy. This legacy is presented digitally via the web. Project curriculum gives classrooms around the globe long-term access to the exciting scientific data. Along with the documentary film project the Deep Gulf Wrecks Project ensures that the legacy at the bottom of the Gulf of Mexico is indeed a lasting legacy.     

LA-ICP-MS analysis of quartzite from the Upper Gunnison Basin,Colorado

We report the results of LA-ICP-MS analysis of 402 quartzite samples representing 48 collection loci in the Upper Gunnison Basin (UGB), Colorado and determine the extent to which the sources can be geochemically discriminated from one another using this non-destructive technique. The ability to differentiate among the sources would open the door to provenance studies of the quartzite chipped-stone tools and debitage that constitute 95% or more of most of the 3000-plus prehistoric site assemblages documented in the UGB. Our samples represent prehistorically quarried and non-quarried quartzite sources, including outcrop (primary) and gravel (secondary) deposits. The results reveal spatial and chronological trends in quartzite elemental composition that can be exploited for provenance determinations of quartzite artifacts from UGB sites, albeit using an assemblage-based sourcing strategy that differs from the familiar approach of “matching” obsidian artifacts to their statistically likeliest geological source. We offer a preliminary version of a sourcing protocol for UGB quartzite.     

The magnetic sourcing of obsidian samples from Mediterranean and near Eastern sources

The magnetic properties of obsidians are examined for their potential in sourcing obsidian artifacts. The three simplest to determine magnetic parameters—initial intensity of magnetization, saturation magnetization and low field susceptibility—are found to be effective discriminants of many Mediterranean, Central European and near Eastern sources. Although the between-source precision is not as good as geochemical analyses of minor and rare-earth elements, the technique demonstrated the existence of new sources that were subsequently confirmed by minor element analyses. Unfortunately some key sources do not appear to be readily distinguishable on these three simple magnetic parameters alone, although more sophisticated magnetic analyses may prove diagnostic. Despite this, it would appear that effective discrimination can be made in many cases, occasionally with more precision than minor element analyses. This technique therefore offers, as a minimum, a preliminary sourcing tool for use in many areas of the world, thus reducing the number of expensive geochemical analyses. Furthermore, its very low cost, non-destructive nature and speed open the possibility of quantitative evaluation of trade routes based on obsidian distributions, particularly as versions of the equipment are now suitable for use in the field.     

Integrating shallow geophysical survey: archaeological investigations at Totógal in the Sierra de los Tuxtlas,Veracruz, México

The Postclassic site of Totógal in the western Tuxtla Mountains of Veracruz, Mexico contains rare examples of stone architectural features in the southern Gulf Lowlands. Today, the partial remains of one such structure are highly visible; however, the amount of wall fall, looters' pit destruction and over-growth masks the extent and form of the feature. Local histories ascribe these ruins to early Colonial construction periods, however Postclassic Aztec-style artifacts recovered near this architecture question the occupational sequence of the site and its constructions. To better examine the extent of construction, as well as the occupation associated with them, we conducted a program of shovel testing, topographic mapping, electromagnetic induction survey and excavation. We discuss our findings in this paper and demonstrate the utility of geophysical surveys as complementary field strategies in the Tuxtla Mountains and other volcanic regions.     

Assessing XRF for the geochemical characterization of radiolarian chert artifacts from northeastern North America

The purpose of this paper is to emphasize the benefits of adopting non-destructive energy dispersive X-ray fluorescence (ED-XRF) as a first-order technique to determine chert whole-rock geochemistry for archaeological sourcing. Chemical signatures for the Touladi and La Martre prehistoric quarries from the lower St. Lawrence and Gaspé Peninsula region of Quebec, Canada, are determined and serve as references to test the provenance of regional chert artifacts. Chert experimental flakes, created from quarry geological hand samples, are analyzed and used to validate the method. Archaeological flakes and tools recovered from three archaeological sites are analyzed and tested against quarry samples. Geochemical diagrams and Principal Component Analysis are used to establish artifact-quarry relationships. The effects of surface weathering on the geochemical analysis of archaeological chert artifacts are presented. Sample restoration and research avenues are discussed and proposed to further enhance the robustness of future chert geochemical data sets.     

FROM SEPARATION TO INTERACTION: CORDED WARE IN THE EASTERN GULF OF FINLAND

Up until recent years, Corded Ware has remained poorly studied in the eastern part of the Gulf of Finland, located in north‐eastern Europe. Traditionally, this region has been considered marginal in terms of Corded Ware, but new research has started to change this view. This paper presents the Corded Ware material known up to the current date (2016) from the eastern area of the Gulf of Finland, i.e. the Karelian Isthmus and Ingria (western Leningrad oblast, Russia); currently ca. 30 sites and ca. 60 stray finds are known in the research area. Based on this and previously published data from the adjoining regions, features related to the material culture, the contact networks, and the chronology of Corded Ware are discussed. Even though focusing the research may skew the picture, there are good grounds to propose, that there was a distinctive Corded Ware sphere of interaction in the eastern area of the Gulf of Finland, also including areas in north‐eastern Estonia and south‐eastern Finland. Due to its particular cultural background, local preferences, and consequently, development trajectories, the area had a clear regional character. Further, populations inhabiting it also maintained active contacts with other Corded Ware groups in the sphere of Baltic Sea and further to the east, as well as with non‐Corded Ware settlers of north‐eastern Europe.     

Possible obsidian sources for artifacts from Timor: narrowing the options using chemical data

Measurements made at the Australian National University using laser ablation ICPMS show that none of the 88 analyzed obsidian artifacts from East Timor match either the known Papua New Guinea or the five Island SE Asian source samples in our ANU collections. There is a coastal journey of more than 3000 km between the occurrence of obsidians from the Bismarck Archipelago volcanic province of Papua New Guinea and the Sunda-Banda Arc volcanic chain, yet obsidian artifacts from the two important PNG sources of Talasea and Lou Island are found at coastal Bukit Tengkorak in eastern Sabah at a similar distance along with material that has no known source. Timor lies south of the eastern section of the active volcanic Banda Arc island chain but it is within range of possible rhyolite sources from there. Although there is a continuous chain of around 60 active volcanoes stretching from west Sumatra to the Moluccas most are basaltic to andesitic with few areas likely to produce high silica dacite–rhyolite deposits. This does not exclude the possibility that the volcanic landscapes may contain obsidian, but without detailed survey and chemical analysis of sources from the Sunda-Banda Arc the attribution of the Timor obsidian artifacts remains to be demonstrated. Timor may seem to be an unlikely source for the presence of obsidians as it lacks reports of the silica-rich rhyolite volcanic centers necessary to produce this material. Despite the absence of detailed survey and analysis of Indonesian obsidian sources, especially from the volcanically active Banda Arc, this paper presents evidence that one of two obsidian sources is clearly from Timor while the other, with less certainty, is also from an unknown local source.     

Lead isotope analysis as a new method for identifying material culture belonging to the Vázquez de Coronado expedition

Archaeological evidence has become an increasingly important component of efforts to identify the route of the Francisco Vázquez de Coronado expedition through northern Mexico and the southwestern United States (1540-1542). Here, we report the first high-precision lead isotopic measurements of artifacts from two archaeological sites with strong material evidence for the expedition’s presence: Piedras Marcadas Pueblo in New Mexico and the Jimmy Owens Site in Texas. The analysis of lead and copper armaments from both sites reveals that many artifacts have overlapping or extremely similar isotopic ratios. We propose that the narrow range of lead isotopic ratios measured on these artifacts can be interpreted as a geochemical fingerprint for some of the Coronado expedition’s surviving material culture, and provides evidence that we interpret to suggest the expedition derived lead and copper metal from Mexican sources. Such a geochemical fingerprint presents an empirical method for discriminating between artifacts that belonged to the Coronado expedition and those related to subsequent Spanish, historical, or modern activity in the Southwest U.S. Thus, this method could significantly impact the search for and identification of archaeological sites associated with the Coronado expedition.