Michael D. Glascock

Michael D. Glascock
University of Missouri | Mizzou · Research Reactor Center, Archaeometry Laboratory

Ph.D.

About

598
Publications
154,968
Reads
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11,155
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Introduction
Dr. Michael D. Glascock (Ph.D., 1975, Iowa State University) is a Research Professor and Group Leader of the Archaeometry Lab. He has over 40 years of experience with NAA and gamma-ray spectroscopy as applied to archaeology, geochemistry, and environmental science. His current research focus involves obsidian source and artifact characterization in the Western Hemisphere.
Additional affiliations
January 1979 - present
University of Missouri
Position
  • Professor
Description
  • I am Leader of the Archaeometry Lab at MURR. I have 40 years of experience analyzing archaeological materials such as pottery, obsidian, etc. to determine provenance, to study technology, and to determine authenticity.
August 1975 - December 1978
University of Maryland, College Park
Position
  • PostDoc Position
Education
September 1971 - May 1975
Iowa State University
Field of study

Publications

Publications (598)
Article
This article reports the identification of the Sayrosa Source, a minor geologic source of volcanic glass referred to Rare Type-3 obsidian in the 1977 pilot study by Burger and Asaro. Located only 25 km northeast of the major Alca-1 deposit, this source was exploited in prehispanic times despite the relatively small size of its nodules. Occasional f...
Article
With this study we provide the compositional characterization of archaeological ceramics from the earliest phases of the indigenous sanctuary located on top of Polizzello Mountain, in Central Sicily (Italy). The site represents a remarkable evidence of the Late Bronze Age (LBA) - Early Iron Age (EIA) transition on the island, and it is characterize...
Article
Applications of energy dispersive portable X-ray fluorescence (pXRF; Olympus Vanta M Series VMR) for the chemical analysis of ceramic fabrics are gaining importance for archaeology. In addition to the broad accessibility of the instruments and their ability to gain first-look chemical data without destroying archaeological samples, the ability to b...
Article
We describe a study of obsidian artifacts from an early Holocene period site located at Kobuleti, Georgia, in the southeastern Black Sea region. A collection of obsidian artifacts discovered there were analyzed by X-ray fluorescence to determine their provenance. Two of the three types of obsidian identified correspond to the Chikiani and Sarikamis...
Article
Full-text available
At the beginning of the second millennium, there were profound aesthetic and technological transformations in Central Chile which have been extensively highlighted in the archaeological literature. In this work, we report on neutron activation analyses of ceramic materials from sites in the Angostura de Paine region, southern Santiago basin, to exp...
Article
In the pre-Columbian Andes, ceremonial centres were places for large-scale periodic celebrations that facilitated interaction and the reproduction of social life; however, little is known about their role and emergence in early periods. In order to explore the nature and scale of social aggregations, we study the circulation of obsidian artefacts f...
Article
The Alca obsidian source in southern Peru is one of the largest and most geochemically complex sources of volcanic glass in South America. Hunter-gatherers first discovered and used Alca obsidian for stone tools at the end of the Pleistocene. Alca later became one of the three most economically important and widely distributed sources of obsidian i...
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The obsidian mirror associated with the Elizabethan polymath and magus John Dee (1527–1608/1609) has been an object of fascination for centuries. The mirror, however, has a deeper history as an Aztec artefact brought to Europe soon after the Spanish conquest. The authors present the results of new geochemical analysis, and explore its history and c...
Article
The present paper sheds new light on the alteration of archaeological ceramics buried in marine environments by analysing in detail a large dataset of Hellenistic and Late Roman Republican transport amphorae from 15 sites along the well-known ancient maritime trade route off the Dalmatian coast in southern Croatia. These include amphorae from shipw...
Article
Although the Chivay Source in the Colca Valley of Arequipa was the dominant provider of obsidian for the Lake Titicaca Basin throughout prehistory, other sources were also exploited. One minor deposit was recognized from a distinctive composition of obsidian artifacts previously known as the Tumuku or Khonko Type, but its geological location had no...
Article
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We present the lead isotopic composition of ceramic fragments from the Kyrenia shipwreck (Cyprus), selected from three chemical groups related to the Rhodes and Alimos regions (Greece). Fragments of the lead sheathing covering the ship’s hull and biogenic material formed on some of the ceramic sherds, were analyzed along with sherds from the Rhodes...
Article
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This paper deals with the findings of Hospital Viejo site of Logroño (La Rioja, Spain), which yielded the largest evidence of local pottery production, comprising three kilns and a potters’ dump (13th–15th centuries). The study of pottery production in inland Iberia provides valuable information on the material conditions in which the Iberian medie...
Article
Obsidians sources used by prehistoric people in the Omolon River basin and neighbouring areas of Northeastern Siberia were determined for 112 artefacts from 30 sites by Energy Dispersive X‐ray Fluorescence method. The main suppliers were the primary obsidian sources in both the Chukotka (Lake Krasnoe) and Kamchatka (Itkavayam, Payalpan, and KAM‐8)...
Article
The sourcing of ceramics contributes to resolve questions about the nature of interactions between ancient societies. One such question concerns the primacy of the Olmec center of San Lorenzo in the development of the first unified iconographic style and its role in the early evolution of Mesoamerican civilization. Applying a combination of the iso...
Article
Our study situates the classic period center Matacanela, located in southern Veracruz, Mexico, within the context of shifting regional political‐economic systems. Specifically, we assess the potential for utilizing neutron activation analysis (NAA) of pottery in the study of changing interactions through a focus on three ceramic wares: Coarse Orang...
Article
This paper presents the results of instrumental neutron activation analysis of 332 decorated serving vessels from household excavations in the "settler" community within Xaltocan, Mexico. Our findings demonstrate significant ceramic production of all major Black-on-Orange and Redware types during the Middle Postclassic, Late Post-classic, and early...
Article
An online computer program for an interactive database was specifically developed for neutron activation analysis (NAA). The software written in Java includes gamma-ray catalog, neutron activation calculator for activity calculations and decay schemes. For the novice, expert and educator this program can greatly reduce needed information in NAA.
Article
A geochemical analysis of 382 obsidian samples from different archeological sites in Central Chile (32°–35° Lat. South) has identified the preferential use of three known sources in the Andean mountain range, Arroyo Paramillos and Laguna del Diamante located in the Maipo Volcano area, and Las Cargas located ca 120 km further south. The analysis of...
Article
Decades of obsidian provenance studies have been conducted in different areas of northwestern Iran. Unlike other parts of northwestern Iran, there have been no obsidian studies in the Little Zab basin. Despite the importance of this basin, only a limited number of excavations and archeological studies in this area have been conducted. The artefacts...
Article
This study examines small-scale household ceramic production at the site of Xaltocan, Mexico, to understand the organization of household ceramic production prior to the development of the Aztec Empire. We examine utilitarian vessels and serving wares from an Early Postclassic ( a.d. 900–1200) domestic context using neutron activation analysis (NAA...
Article
Full-text available
El análisis visual de la obsidiana, en combinación con el análisis químico de una muestra representativa, ha sido una técnica común y útil en la determinación de fuentes de colecciones de lítica. En este estudio presentamos los resultados de un análisis químico y visual aplicado a la colección de obsidiana que deriva del sitio arqueológico de Teote...
Article
The introduction of pottery in North Patagonia (Argentina), approximately 2000 years BP, allowed hunter-gatherers to exploit resources in new ways, but also required alterations to lifeways to accommodate this new technology, especially in territoriality, exchange, and home ranges. Ceramic provenance analysis allows us to focus on the characteristi...
Article
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New geochemical results for two obsidian types, Laguna del Diamante and Arroyo Paramillos, naturally available in the Laguna del Diamante locality, a seasonally accessible highland wetland emplaced in the current border between Argentina and Chile at 3300 masl (34°S), are presented. A total of 1219 archeological artifacts from 41 sites located on b...
Article
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The purpose of this paper is to analyze the possibility of the existence of an unknown obsidian source between the south of the Deseado Massif and the northern shore of the Santa Cruz River basin (Patagonia, Argentina). The high frequency of obsidian in some of the analyzed spaces and the information provided by local inhabitants about the existenc...
Article
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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...
Article
In Northwestern Patagonia, the obsidian was used during the entire Holocene, and its importance increased with time. Recent field work allowed the discovery of a new obsidian source located in the Rio Grande river, which was called “Coche Quemado” (CQ). The results indicate that the CQ source has a different geochemical signal than all other source...
Article
Full-text available
We present the results of XRF analysis for 59 obsidian samples from 11 archaeological sites in Auca Mahuida region, Northeastern Neuquén, Argentina. The results indicate that several obsidian sources were utilized; however, the intensities of their exploitation were variable. Strong differences appear between the Colorado river basin, characterised...
Article
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Since the 1990s, a characteristic obsidian geochemistry has linked widespread archaeological assemblages spanning the Russian Far East, Korean Peninsula, and Northeast China. Referred to as PNK1, the source of this material has yet to be identified. As a contribution to solving this enduring puzzle, we report here analyses of a commercial specimen...
Article
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In Mesoamerica, the Early Postclassic (AD 900–1200) is characterized by the long-distance circulation of pottery with a very hard and shiny coating with a metallic aspect, known as Plumbate ware. Plumbate is linked stylistically to the Toltec culture but was produced in workshops in Soconusco (Chiapas). The discovery of a similar collection of sher...
Article
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En el norte neuquino existen depósitos piroclásticos que contienen nódulos de obsidianas. Las investigaciones en la región dieron a conocer las principales fuentes utilizadas por las poblaciones que allí habitaron. Para profundizar el conocimiento de cada fuente de obsidiana se adoptó un programa de estudio geoarqueológico y geoquímico. Así, se han...
Article
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This study presents preliminary results of petrographic and X-ray fluorescence analyses of cut stone blocks used for urban construction at Teotihuacan, the capital of a regional state in Central Mexico (ca. AD 150–650). Cut stone blocks were concentrated in the civic-ceremonial core of the city and were probably prestigious architectural elements d...
Article
Zisha stoneware is a distinctive pottery tradition unique to China. This ceramic tradition was highly popularized during the Ming Dynasty (1368–1644 CE), and continues to be manufactured through the present day. Throughout history, Zisha stoneware vessels have been highly desirable objects used mainly by high status individuals, and by the early 17...
Article
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Analysis of 519 obsidian artifacts (pebbles, debitage, cores and small bifaces) by nondestructive X-ray fluorescence from forests and steppes of southern Lanín National Park in the northern Patagonian Andean region, from Lácar (chemical group QU/AP), Lolog (CP-LL 1), Filo Hua-Hum (FHH), Paillakura (Pk, former unknown 1 group), Meliquina (MQ, former...
Chapter
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In Central Western Argentina (CWA) ceramic technology has been dated ca. 2000 years BP. Since then, it had experimented temporal and spatial variation in stylistics attributes of manufacture and decoration. In part, this variability was according to differences in cultural, social and economic organization in the area over time. Atuel and Diamante...
Chapter
Beginning around 2500 B.P (ca. A.C. 500) inhabitants of the coastal the Antofagasta region began to be involved in the general northern Chile Formative process. Although their subsistence strategies continued to be based on hunting, fishing, and marine resource collection, some aspects of their material culture showed remarkable changes. In particu...
Article
The process of dating ancient obsidian artifacts converts the quantity of surface diffused molecular water to a calendar age using an experimentally derived diffusion coefficient predicted from glass composition. The internal structural water content of rhyolitic obsidian has been identified as a highly influential variable that controls the rate o...
Article
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Zhokhov Island in the Siberian High Arctic has yielded evidence for some of the most remote prehistoric human occupation in the world, as well as the oldest-known dog-sled technology. Obsidian artefacts found on Zhokhov have been provenanced using XRF analysis to allow comparison with known sources of obsidian from north-eastern Siberia. The result...
Article
Northwestern Patagonia is located in a tectonically active part of the southern Andes (Argentina), which has facilitated the formation of obsidian, including pyroclastic deposits that have been affected by geomorphic processes, resulting in a complex obsidian landscape. To date, the geomorphic relocation of obsidian in the landscape has not been a...
Article
The oldest pottery technology in North America was innovated by hunter-gatherers belonging to the Late Archaic Stallings culture (ca. 5150-3200 cal B.P.) of Georgia and South Carolina. The culture history of Stallings societies is relatively well-known; however, the permanence and scale of Stallings communities, the nature of the connections among...
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Geochemical analysis of the first obsidian artefact discovered in Belarus reveals its source to be the Trans-Caucasus, rather than the expected Carpathian source for prehistoric obsidian in Eastern Europe.
Article
Excavations at the site of Kul Tepe in the Jolfa region in north-western Iran have unearthed various archaeological materials from Late Neolithic/Early Chalcolithic to Achaemenid periods (end of 6th millennium to 3rd century BC). During the Chalcolithic and the Bronze Age most lithic tools used in Kul Tepe were made of obsidian. From the first and...
Article
This work investigates questions regarding obsidian circulation among the late populations (since ca. 1100 BP) of Antofagasta de Sierra (Catamarca Province, Argentinean Southern Puna Plateau). By means of geochemical provenance studies conducted on obsidian artefacts, the sources of obsidian that these groups accessed have been identified. The samp...
Article
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Worldwide applications of ochre analysis continue to develop at a rapid pace, highlighting a number of analytical and interpretative issues. As regional source databases continue to grow, researchers have turned to the thornier issues of source allocation. In this study, we utilize LA–ICP–MS and NAA to examine archaeological pigments, ceramic paint...
Article
p>La relación entre Teotihuacan, Estado que dominó durante siglos una vasta región mesoamericana, y el valle de Toluca, que formó parte de su hinterland, ha sido fundamental para esclarecer los procesos históricos de este valle. Dicha relación se hace presente en la cultura material por múltiples manifestaciones, desde la vida cotidiana hasta la co...
Article
Temporary sites were a critical component of the prehistoric Near Eastern economy but, because of their ephemeral nature, are less frequently the focus of research than sedentary settlements. The present article presents the results of neutron activation analysis conducted on pottery from the temporary site of Saruq al-Hadid, United Arab Emirates....
Article
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We use ceramic and obsidian data from the ancient Maya port site of Vista Alegre to discuss long-distance exchange during the Terminal Classic (c. AD 850–1100) period. This is a time often associated with increased international trade relations and the growth of Chichen Itza as a dominant regional power in the northern Maya lowlands. Critical to th...
Article
Researchers have long been interested in tracing the movement of vesicular basalt from natural source areas to archaeological contexts in the Salt-Gila Basin of southern Arizona. However, this effort has been hampered by the lack of a reliable and practical analytical technique for characterizing the composition of individual artifacts and specimen...
Article
Primary questions regarding the foraging behaviour of the first hunter–gatherers who colonized the New World are how they found, procured and utilized high‐quality raw materials for manufacturing stone tools. In this paper, we present evidence from the late Pleistocene site of Cueva Bautista in the highlands of south‐western Bolivia, which demonstr...
Article
Geochemical analysis of 102 obsidian artifacts from the lower reaches of the Kolyma River was performed to understand the provenance of the raw material; previously, there were no such studies in this region. Sites under investigation belong to the Arctic Neolithic, generally dated to ca. 6000–1500 BP. Based on the data for potential obsidian sourc...
Article
This paper presents the results of neutron activation analyses of pottery samples from four late sixth century bce sites in the Western Mediterranean: the Pointe Lequin 1A shipwreck, the Bourse site in Marseilles, the Greek colony of Emporion and the Cala Sant Vicenç shipwreck, with the goal of locating the production of a commonly found cup type,...
Article
Obsidian provenance studies, based on geochemical signatures, are important for determining the source regions of obsidian artefacts. Such research depends on the availability of reproducible geochemical data. An interlaboratory study was conducted to validate analytical methods applied to samples from four obsidian sources in northeast Hokkaido Is...
Article
This study presents the results of instrumental neutron activation analysis (INAA), laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) and thin-section analysis of 74 majolica sherds from 16th-18th Century sites in the Zaña Valley and Magdalena de Cao Viejo, Peru, and Panama Viejo, Panama. The majority of majolica samples from...
Article
Campanayuq Rumi is a large civic-ceremonial center located in the south-central highlands of Peru. Founded in the late Initial Period (1100–800 BC), Campanayuq Rumi became an important center within the Chavín Interaction Sphere in the Early Horizon (ca. 800–400 BC). In particular, Campanayuq Rumi is significant because of its geographical proximit...
Poster
Full-text available
El presente trabajo parte de discutir las hipótesis de autores previos (Lagiglia 1977, 1997), los cuales establecen una amplia diversidad de tipos cerámicos para la cuenca del río Atuel. Estos tipos cerámicos estarían vinculados a distintas poblaciones de cazadores recolectores que ocuparon la región. En esta ocasión se pretende contrastar esta hip...
Article
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This report considers features of the geochemical composition of obsidian from beach sediments of Krasnoe Lake along the lower course of the Anadyr River, as well as from lava–pyroclastic rocks constituting the lake coastal deposits and the surrounding branches of Rarytkin ridge. The two geochemical types of obsidian first distinguished and researc...
Article
In this paper petrographic and NAA analyses of two categories of ceramic wares of the early medieval Vega of Granada (southeast Spain) are presented. The vessels analysed include Water Containers and Glazed Wares and were manufactured between the sixth and the twelfth centuries CE. This is the period of the Islamization of Iberia and the emergence...
Article
Chemical characterization reveals intra-source variation in obsidian from the Paredón source area in Puebla and Hidalgo, Mexico. Two chemical sub-sources of obsidian from Paredón are spatially discrete and cannot be distinguished by visual characteristics. To facilitate future investigations of the prehistoric exploitation of these sub-sources, an...
Article
There has been a long discussion on the nature of cultural, societal, and economical transformation after the migration of the Kura-Araxes groups from southern Caucasus to Iran and eastern Anatolia in the host areas. Provenance studies of obsidian artifacts could shed more light on this issue from another aspect. In this paper, we investigate if th...