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Limestone spheroid 3D models for: The limestone spheroids of ‘Ubeidiya: Intentional imposition of symmetric geometry by early hominins?

  • Datos identificativos

    Identificador: PC:4019
  • Autores:

    Titton, Stefania
  • Otros:

    Materia: Arqueologia
    Derechos de acceso: info:eu-repo/semantics/openAccess
    Identificador del investigador: 0000-0003-1703-9801
    Publicado por (editorial): Universitat Rovira i Virgili (URV)
    Publicaciones relacionadas: Muller, A., Barsky, D., Sala-Ramos, R., Sharon, G., Titton, S., Vergès, J.-M., & Grosman, L. (2023). The limestone spheroids of ‘Ubeidiya: Intentional imposition of symmetric geometry by early hominins? Royal Society Open Science, 10(9), 230671. https://doi.org/10.1098/rsos.230671
    Resumen: Spheroids are one of the least understood lithic items yet are one of the most enduring, spanning from the Oldowan to the Middle Palaeolithic. Why and how they were made remains highly debated. We seek to address whether spheroids represent unintentional by-products of percussive tasks or if they were intentionally knapped tools with specific manufacturing goals. We apply novel 3D analysis methods, including spherical harmonics and surface curvature, to 150 limestone spheroids from ‘Ubeidiya (c.1.4Ma), presently the earliest Acheulean occurrence outside of Africa, to bring a new perspective to these enigmatic artefacts. We reconstruct the spheroid reduction sequence based on trends in their scar facets and geometry, finding that the spheroid makers at ‘Ubeidiya followed a premeditated reduction strategy. During their manufacture, the spheroids do not become smoother, but they become markedly more spherical. They approach an ideal sphere, a feat that likely required a mental template and skilful knapping. Acheulean bifaces are currently thought to represent the earliest evidence of hominins imposing a premeditated, symmetrical shape on stone. With evidence of spheroids occurring before the Acheulean, the intentional production of a sphere-like object now represents the oldest evidence of hominins desiring and achieving intentional geometry and symmetry in stone.
    Departamento: Història i Història de l'Art
    DOI: 10.5061/dryad.9ghx3ffp3
    Tipo de documento: info:eu-repo/semantics/other
    DOI de la publicación relacionada: 10.1098/rsos.230671
    Fecha alta repositorio: 2023-08-21
    Autor: Titton, Stefania
    Palabras clave: Archaeology, History and archaeology, 3D Lithic Analysis, Acheulean, Spheroids, Stone Balls
    Año de publicación de la dataset: 2023
    Acción del progama de financiación: "Gerda Henkel Foundation, Award: AZ 32/V/19 Ministerio de Ciencia e Innovación, Award: CEX2019-000945-M Government of Catalonia, Award: SGR: 2021 SGR 01238 (AGAUR) "
    Título del conjunto de datos: Limestone spheroid 3D models for: The limestone spheroids of ‘Ubeidiya: Intentional imposition of symmetric geometry by early hominins?
  • Palabras clave:

    Arqueologia
    Archaeology, History and archaeology, 3D Lithic Analysis, Acheulean, Spheroids, Stone Balls
  • Documentos:

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