Study of plant remains from a fluvial shellmound (Monte Castelo, RO, Brazil) using the X-ray MicroCT imaging technique

Calo, Cristina Marilin; Rizzutto, M. A.; Watling, Jennifer; Furquim, Laura Pereira; Shock, Myrtle P.; Andrello, Avacir Casanova; Appoloni, Carlos Roberto; Freitas, Fábio de Oliveira; Kistler, Logan; Zimpel, Carlos Augusto; Hermenegildo, Tiago; Neves, Eduardo Góes; Pugliese, Francisco

doi:10.1016/j.jasrep.2019.101902

Cited by 9 publications

(6 citation statements)

References 51 publications

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“…Volumetric quantification of objects in archaeological studies using microCT, whether experimental tools/materials, actual artifacts, organic remains, or fossils, is proving to be a valuable analytical tool for researchers. In the majority of cases, microCT is used on the macroscale, primarily for morphometric reconstructions and analyses of the shapes, dimensions, and/or internal structures of bone, shell, tooth, ceramic, glass, plant, stone, and wood (e.g., Abel et al, 2011;Agostino et al, 2016;Arnaud et al, 2016;Beck et al, 2012;Bello and Galway-Witham, 2019;Bello et al, 2013aBello et al, , 2013bBosch et al, 2019;Bradfield, 2013Bradfield, , 2015Calo et al, 2019;Dreossi et al, 2010;Guzzo Falci et al, 2020;Gerlach et al, 2006;Kahl and Ramminger, 2012;Karl et al, 2014;Machado et al, 2017;Mizuno et al, 2010;Ngan-Tillard et al, 2018;Viallet, 2019;Woods et al, 2017;Xing et al, 2018).…”

Section: Micro-computed Tomography (Microct) and Archaeologymentioning

confidence: 99%

Revisiting lithic edge characterization with microCT: multiscale study of edge curvature, re-entrant features, and profile geometry on Olduvai Gorge quartzite flakes

Macdonald

Bartkowiak

Mendak

et al. 2022

Archaeol Anthropol Sci

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The angle and shape of lithic tool edges have long been used as a method of inferring prehistoric tool function. However, accurately measuring and characterizing edge angles of lithic tools is notoriously difficult. Studies using goniometers, calipers, or morphometrics often rely on twodimensional representations of edges. Furthermore, there have been limited attempts to quantitatively document stone tool edges based on surface metrology, most notably edge curvature. In this study, we use microCT to capture models of the complex geometry, or 'freeform' surfaces, of experimental quartzite flakes from Olduvai Gorge (Tanzania) to document and mathematically calculate edge curvature using multi-scalar length-scale analysis. Through this analysis, we also explore the quantification of re-entrant [overhang] features on lithic edge cross-sections. On lithic tools, especially coarse-grained rocks with complex surface topographies such as quartzite, traditional techniques for edge angle measurement are incapable of capturing re-entrant features on edge profiles. Here we present the first archaeological study that addresses the measurement of these re-entrant features, using novel length-scale and curvature analysis methods of calculating edge angles for complex freeform surfaces. With these new methods for measuring edge angles, we can consider the impact of complex geometry, including re-entrant features, on the function of lithic tools in the past.

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Section: Micro-computed Tomography (Microct) and Archaeologymentioning

confidence: 99%

Revisiting lithic edge characterization with microCT: multiscale study of edge curvature, re-entrant features, and profile geometry on Olduvai Gorge quartzite flakes

Macdonald

Bartkowiak

Mendak

et al. 2022

Archaeol Anthropol Sci

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“…These fruits were found concentrated in the most recent stratigraphic package of the shellmound that is related to the Bacabal Archaeological Phase, although they are also present in other archeological layers. This Phase consists predominately of layers of dark soil and shells, where richly decorated pottery, animal bones, plant materials, and human burials have been found 15 , 18 – 21 (Fig. 2 b).…”

Section: Methodology and Materialsmentioning

confidence: 99%

“…The results of that study were especially relevant to question the hypothesis of the caryopsis (maize-type) morphology, externally observed in several exemplars. In contrast, the technique allowed the identification of their drupaceous anatomy, and the suggestion of some morphological relationships with the Anacardiaceae 15 . Those same specimens were imaged using X-ray MicroCT and High Resolution Light Microscopy (HRLM) to specify the presence of a three-layered pericarp, vascular bundles and differentiated cellular contents.…”

Section: Introductionmentioning

confidence: 99%

A correlation analysis of Light Microscopy and X-ray MicroCT imaging methods applied to archaeological plant remains’ morphological attributes visualization

Calo

Rizzutto

Carmello-Guerreiro

et al. 2020

Sci Rep

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In this work, several attributes of the internal morphology of drupaceous fruits found in the archaeological site Monte Castelo (Rondonia, Brazil) are analyzed by means of two different imaging methods. The aim is to explore similarities and differences in the visualization and analytical properties of the images obtained via High Resolution Light Microscopy and X-ray micro-computed tomography (X-ray MicroCT) methods. Both provide data about the three-layered pericarp (exo-, meso- and endocarp) of the studied exemplars, defined by cell differentiation, vascularisation, cellular contents, presence of sclerenchyma cells and secretory cavities. However, it is possible to identify a series of differences between the information that can be obtained through each of the methods. These variations are related to the definition of contours and fine details of some characteristics, their spatial distribution, size attributes, optical properties and material preservation. The results obtained from both imaging methods are complementary, contributing to a more exhaustive morphological study of the plant remains. X-ray MicroCT in phase-contrast mode represents a suitable non-destructive analytic technique when sample preservation is required.

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“…在考古学中的应用也愈发频繁, 一些研究开始将大植物遗存材料作为显微CT分析的对象 [80] . 这些研究使用显微CT扫描来将植物的形态特征可视化, 包括种子形态特征 [81,82] 、果皮的组织层次 [83,84] 以及微观层次特征, 如维管束、纤维组织和细胞等 [85,86] . 显微CT技术能够帮助研究者获取遗存的内部信息, 为先前基于外部形态的鉴定标准提供补充.…”

Section: 随着更多学者认识到显微Ct技术的优点该技术unclassified

MicroCT technology facilitating archaeobotany and the study of origin and evolution of agriculture

An,

Zhang,

Peng

et al. 2024

Chin. Sci. Bull.

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Study of plant remains from a fluvial shellmound (Monte Castelo, RO, Brazil) using the X-ray MicroCT imaging technique

Cited by 9 publications

References 51 publications

Revisiting lithic edge characterization with microCT: multiscale study of edge curvature, re-entrant features, and profile geometry on Olduvai Gorge quartzite flakes

Revisiting lithic edge characterization with microCT: multiscale study of edge curvature, re-entrant features, and profile geometry on Olduvai Gorge quartzite flakes

A correlation analysis of Light Microscopy and X-ray MicroCT imaging methods applied to archaeological plant remains’ morphological attributes visualization

MicroCT technology facilitating archaeobotany and the study of origin and evolution of agriculture

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