scholarly journals Shape as a function of time + raw material + burial context? An exploratory analysis of Perdiz arrow points from the ancestral Caddo area of the American Southeast

2021 ◽  
Author(s):  
Robert Z. Selden ◽  
John Dockall ◽  
britt bousman ◽  
Timothy Perttula
Keyword(s):  
Geometric Morphometrics ◽  
Lithic Technology ◽  
Exploratory Analysis ◽  
Raw Material ◽  
Stone Tool ◽  
Material Quality ◽  
Burial Practices ◽  
American Southeast

Temporal assignments carry substantive weight, and archaeologists regularly assume that artefacts from discrete temporal units may differ in ways that convey changes in preference or behaviour. Similarly, archaeologists regularly assume that raw material differences articulate with stone tool morphology, and the role of differential raw material quality and preference associated with Caddo lithic technology remains largely unexplored. Whether a particular artefact is found in or outside of burial contexts is a sensitive and regularly discussed topic in the archaeological literature, providing valuable insights related to prehistoric burial practices, as well as generational shifts in aesthetics, design, and raw material preferences. These assumptions were tested using geometric morphometrics, yielding results in support of the hypothesis that Perdiz arrow point shape is protean, and that significant differences existed in shape by time, raw material, and burial context.

Energetic Efficiency and Lithic Technology: An Upper Mississippian Example

1992 ◽  
Vol 57 (3) ◽  
pp. 467-481 ◽  
Author(s):  
Robert J. Jeske
Keyword(s):  
Lithic Technology ◽  
Optimal Foraging Theory ◽  
Poor Quality ◽  
Raw Material ◽  
Stone Tool ◽  
Energy Budgets ◽  
Energetic Efficiency ◽  
Human Populations ◽  
Projectile Points ◽  
Formal Tool

Optimal-foraging theory and the concept of energetic efficiency have been used in archaeology for over a decade, usually to explore subsistence behavior. People, however, made choices for energy expenditure in other areas of culture, including lithic technology. It is suggested that a shift in the allocation of energy as an adaptive response to changes in social organization caused the widely noted decline in formal tool types and stone-tool refinement in the late prehistoric periods in eastern North America. Data from an Upper Mississippian village are used to demonstrate the economic use of poor-quality lithic raw material. A bipolar technique was used to produce flake blanks for triangular projectile points as well as a peculiar but common Upper Mississippian tool, the humpback biface. It is suggested that bipolar reduction and other lithic efficiency and economizing strategies are indicators of stress on the energy budgets of human populations.

The role of raw material differences in stone tool shape variation: an experimental assessment

2014 ◽  
Vol 49 ◽  
pp. 472-487 ◽  
Author(s):  
Metin I. Eren ◽  
Christopher I. Roos ◽  
Brett A. Story ◽  
Noreen von Cramon-Taubadel ◽  
Stephen J. Lycett
Keyword(s):  
Raw Material ◽  
Stone Tool ◽  
Shape Variation ◽  
Experimental Assessment ◽  
Tool Shape

scholarly journals Stone Industries of Baraba “Flat-Bottomed Neolithic” Settlements

2020 ◽  
Vol 19 (7) ◽  
pp. 176-190
Author(s):  
Alena Yu. Yurakova ◽  
Alexey G. Marochkin
Keyword(s):  
Raw Materials ◽  
Morphological Characteristics ◽  
Raw Material ◽  
Stone Tool ◽  
Ceramic Ware ◽  
Forest Steppe ◽  
Late Neolithic ◽  
Mineralogical Study ◽  
Clear Predominance

Purpose. The article presents the results of a study of technological and morphological characteristics of stone tool collections from the Early Neolithic settlement assemblages of Barabinsk forest-steppe containing flat-bottomed ware – Avtodrom-2, Avtodrom-2/2, Staryi Moskovsky Trakt-5 settlements. The results of a mineralogical study of the raw materials has been used. The objects of all considered collections have been proven to be identical (lithic cores, flakes, blades, perforators, sandstone abrasives, polished axes; in the absence of primary flakes and arrow points). Similarities of three sites have been found in preferable raw material (silty sandstone and other metamorphic rocks, flint, opal) in primary technology (prismatic lithic core), big amount of microblades, predominance of regular end-scrapers made from flakes, big abrasives. Results. A difference in the predominant retouch location in a special work of blades: ventral (Avtodrom-2/2, SMT-5 – up to 60 %) and dorsal (Avtodrom-1 – 61 %). The specifics of the stone industries in Baraba Neolithic settlements with flat-bottomed ceramic ware can be clearly seen in comparison with local assemblages of Artynskaya culture (late Neolithic). In comparison with considered industries, Artynsksya culture (Avtodrom-2/1 settlement) preferred another type of raw material (gray silicified sandstone), bigger role of counterstrike knapping, larger blades, clear predominance of dorsal retouch in treatment of blade tools, and differences in object classification (series of arrow points, scrapers of occasional forms, knives on large blades, stone club knobs). Conclusion. The obtained results do not contradict the idea of cultural and chronological unity of all settlements in Barabinsk forest-steppe with flat-bottomed Neolithic ware. Comparative and typological analysis of stone industries of all Neolithic assemblages with flat-bottomed ceramic ware in the Ural-West Siberian region is still advantageous, yet an undeveloped approach taking into account their polemical cultural and chronological attribution.

A critique of the Chinese ‘Middle Palaeolithic’

Antiquity ◽  
2002 ◽  
Vol 76 (292) ◽  
pp. 397-412 ◽  
Author(s):  
Xing Gao ◽  
Christopher J. Norton
Keyword(s):  
Lithic Technology ◽  
Modern Human ◽  
Human Behaviour ◽  
Raw Material ◽  
Stone Tool ◽  
Middle Palaeolithic ◽  
Two Stage ◽  
Material Procurement ◽  
Core Reduction ◽  
Late Palaeolithic

The Chinese Palaeolithic has traditionally been divided into three distinct cultural periods: Lower, Middle, and Upper. Analysis of four stone tool criteria (raw material procurement, core reduction, retouch, and typology) to determine if a distinct Middle Palaeolithic stage existed in China suggests that very little change occurred in lithic technology between the Lower and Middle Palaeolithic. Accordingly, a two-stage progression is proposed: Early and Late Palaeolithic. The transition between these two cultural periods occurred with the development of more refined stone tool making techniques (e.g. introduction of blade and microblade technology) and the presence of other archaeological indicators of more modern human behaviour (e.g. presence of art and/or symbolism) (c. 30,000 years ago).

Prediction and assessment of effective state of machinery surface layer at science intensive technologies use

2018 ◽  
Vol 2018 (8) ◽  
pp. 44-48
Author(s):  
В. Бутенко ◽  
V. Butenko
Keyword(s):  
Surface Layer ◽  
Quality Index ◽  
Working Capacity ◽  
Material Quality ◽  
Layer Material ◽  
Operation Characteristics

The assessment indices of surface layer effective state in machinery subjected to different ways of finishing are considered. The role of the dislocation restructurization process in the formation of operation characteristics of surface layer material quality and prediction of its working capacity is shown. A generalized quality index of multi-component functional layers formed on operation surfaces of machinery is described.

scholarly journals Rheological Characterization of a Concentrated Phosphate Slurry

Fluids ◽  
2021 ◽  
Vol 6 (5) ◽  
pp. 178
Author(s):  
Souhail Maazioui ◽  
Abderrahim Maazouz ◽  
Fayssal Benkhaldoun ◽  
Driss Ouazar ◽  
Khalid Lamnawar
Keyword(s):  
Flow Behavior ◽  
Continuous Phase ◽  
Raw Material ◽  
Rheological Characterization ◽  
Phosphate Ore ◽  
Insoluble Particles ◽  
Experimental Protocols ◽  
Solid Liquid

Phosphate ore slurry is a suspension of insoluble particles of phosphate rock, the primary raw material for fertilizer and phosphoric acid, in a continuous phase of water. This suspension has a non-Newtonian flow behavior and exhibits yield stress as the shear rate tends toward zero. The suspended particles in the present study were assumed to be noncolloidal. Various grades and phosphate ore concentrations were chosen for this rheological investigation. We created some experimental protocols to determine the main characteristics of these complex fluids and established relevant rheological models with a view to simulate the numerical flow in a cylindrical pipeline. Rheograms of these slurries were obtained using a rotational rheometer and were accurately modeled with commonly used yield-pseudoplastic models. The results show that the concentration of solids in a solid–liquid mixture could be increased while maintaining a desired apparent viscosity. Finally, the design equations for the laminar pipe flow of yield pseudoplastics were investigated to highlight the role of rheological studies in this context.

scholarly journals Contribution of Cyanotoxins to the Ecotoxicological Role of Lichens

Toxins ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 321
Author(s):  
Dobri Ivanov ◽  
Galina Yaneva ◽  
Irina Potoroko ◽  
Diana G. Ivanova
Keyword(s):  
Research Methods ◽  
Raw Material ◽  
Modern Times ◽  
Effective Application ◽  
The World ◽  
The Common

The fascinating world of lichens draws the attention of the researchers because of the numerous properties of lichens used traditionally and, in modern times, as a raw material for medicines and in the perfumery industry, for food and spices, for fodder, as dyes, and for other various purposes all over the world. However, lichens being widespread symbiotic entities between fungi and photosynthetic partners may acquire toxic features due to either the fungi, algae, or cyano-procaryotes producing toxins. By this way, several common lichens acquire toxic features. In this survey, recent data about the ecology, phytogenetics, and biology of some lichens with respect to the associated toxin-producing cyanoprokaryotes in different habitats around the world are discussed. Special attention is paid to the common toxins, called microcystin and nodularin, produced mainly by the Nostoc species. The effective application of a series of modern research methods to approach the issue of lichen toxicity as contributed by the cyanophotobiont partner is emphasized.

Ivory in the Chalcolithic enclosure of Perdigões (South Portugal): the social role of an exotic raw material

2015 ◽  
Vol 47 (3) ◽  
pp. 390-413 ◽  
Author(s):  
António Carlos Valera ◽  
Thomas Xaver Schuhmacher ◽  
Arun Banerjee
Keyword(s):  
Social Role ◽  
Raw Material ◽  
The Social ◽  
South Portugal

A true gift of mother earth: the use and significance of obsidian at Çatalhöyük

2011 ◽  
Vol 61 ◽  
pp. 1-19 ◽  
Author(s):  
Tristan Carter
Keyword(s):  
Raw Materials ◽  
Daily Practice ◽  
Social Identities ◽  
Raw Material ◽  
Central Anatolia ◽  
Social Significance ◽  
Key Issues ◽  
Raw Material Variability ◽  
Mother Earth

AbstractThis paper reviews 50 years of obsidian studies at Neolithic Çatalhöyük in the Konya plain, central Anatolia. A number of key issues are addressed: (1) the source of the site's raw materials, the means and forms by which the obsidian was introduced to the site and the role of Çatalhöyük in the supra-regional dissemination of these raw materials; (2) the alleged gender associations of certain obsidian goods in the burial record and beyond; (3) a more general consideration of the social significance of the circulation and consumption of obsidian at the site, including the phenomena of hoarding and gifting, plus the important role of projectiles in the creation of social identities and various forms of ritual behaviour, not least the termination of the life of a building/individual; (4) the technotypological and raw material variability through time; (5) the use of obsidian in daily practice and craft-working.

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