Alain Queffelec

@alainqueffelec.bsky.social

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Ingénieur de recherche CNRS, PhD in Caribbean archaeology (lithic beads and pendants). Archaeometry, spectroscopy, minerals and so on.

Figure 1 from the preprint: Comparison of Web of Science (Wos), OpenAlex (OA), and OpenCitations (OC) data for the articles present in the three datasets. A. Number of authors, B. Length of the title, C. Number of pages, D. Attributed year, E. Number of references. For each plot, a dashed-line represents y = x.
PCA showing the distribution of the top-25 2 year-mean-citedness journals based on 5 metrics: Number of pages, Number of authors, Relative title length, Recency fo references and Diversity of sources.
Table comparing the ranking archaelogical journals between OpenAlex and Web of Science for the top 25 journals. Ranking by 2-yer-mean-citedness, H-index and i10 for OpenAlex, and 2022 Impact Factor for Web of Science
Boxplots comparing data for top-25 journal metrics and data from Fanelli & Glanzel 2013 for Physics, Social Sciences and Humanities. Most of the time Archaeology fits pretty close to Social Sciences, except for Diversity of sources where it harder than Physics.
Photo of several flint fragments
Small table showing the number of articles and the APC raised, per day, for a single week, of the journal Scientific Reports. Numbers add to more than 550 papers published in a week, which makes more than 1.2 million euros (considering 2190€ or APCs per paper).
The road sign indicating Stone Hill
Screenshot of the online database
A small "frog-shaped" pendant made of sudoite
Two serpentine bead, one almst white, the other one very dark green with black parts and some white veins.
An amazingly polished amethyst bead !
Comparison of both archaeological artefacts, the two obsidian samples analysed by LA-ICP-MS, with Belizites (from Rochette et al. 2021, Pb is below detection limit in this analysis) and some andesites from northwest Martinique (from Labanieh, 2009, Tm are lacking in these analysis). A. N-MORB-normalised trace elements patterns. B. Chondrite-normalised REE patterns.
Total Alkali Silica (TAS) diagram illustrates the elemental composition measured using PIXE and EPMA on glassy archaeological and geological samples. All the artefacts, with the exception of one, consist of an unusual andesitic glass, while the geological samples are composed of obsidian, a more typical rhyolitic glass.
Map indicating the locations of the archaeological sites from which the artefacts originate, and the locations of the geological deposits that have been sampled (Guadeloupe and Puerto Rico) or are scheduled for sampling but already used as comparative data (Martinique). SJB and MGCT02 are located on the same spot as the sites are only a few tens of metres apart.
Macrophotographs of the sixteen glassy artefacts recovered from six archaeological sites.
Uses of pebbles in 82 cultures of the standard cross cultural sample
Principal component analyses taking into account morphometric, roughness and colorimetric variables. The PCA in (A) and (B) compares natural, experimental and archaeological gravels. Gravels from Landry and those retrieved during the sieving of the sediments from this site are plotted separately. The PCA in (C) and (D) compares experimental gravels with those found at each archaeological sites. Dots correspond to one of the four measurements performed on each gravel: 35 natural, 69 archaeological and 22 experimental gravels.
(A) Material used for experiment 1, the animal skin used and the cylinder of the polishing drum. (B) Material used for experiment 2, the ochred and greased animal skin. Illustration of the chaîne opératoire reproducing an ochre tanning: obtaining the ochre powder and applying the ochre/grease paste on the hide. (C) Equipment used for experiment 3, the soil polish. A mechanical polisher covered with silt collected on the Landry site. Presentation of the manual (bottom left) then mechanical (bottom right) method of gravel gripping.
Macroscopic (left) and microscopic (right) photos of gravels from rchaeological sites illustrating the luster on surfaces. (A-B) Gravel n˚R12D_64 from Landry; (C-D) gravel n˚K11D50_5 from Casserole and (E-F) gravel n˚109b from Fourneau du Diable.
(A) Comparison of gravel length, (B) width and (C) circularity index for each site. The circularity index is close to 1 for a round object and 0 for an object ofmore complex morphology.
Graphics presenting the results of the spatial analysis. (A) Count of gravels in the Landry grid. This area corresponds to sector 1 (squares columns I through J), sector 2 (columns K through P), and sector 3 (columns P through V). (B) Simulation of a uniform spatial distribution of gravel on sector 1, 2 and 3. (C) Distribution of dispersion indices corresponding to a uniform distribution (500 random draws) and on the right in purple, dispersion index associated with real glossy gravel’s distribution.
Contextual data on Upper Palaeolithic sites with lustrous gravels.
Lustrous gravels discovered in several Palaeolithic sites in southwestern France. (A) Late Solutrean gravels from Landry; (B): Late Solutrean gravels from Laugerie Haute West; (C) Late Solutrean gravels from Laugerie Haute East; (D) Solutrean gravels from Pech de la Boissiere; (E) Solutrean gravels from the Abri Casserole; (F) Gravettian gravels from Fourneau du Diable; (G) Solutrean gravels from Fourneau du Diable and (H) Late Solutrean from Fourneau du Diable.