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Digitization of Fossils from the Fezouata Biota (Lower Ordovician, Morocco): Evaluating Computed Tomography and Photogrammetry in Collection Enhancement

  • Khaoula KouraissEmail author
  • Khadija El Hariri
  • Abderrazak El Albani
  • Abdelfattah Azizi
  • Arnaud Mazurier
  • Bertrand Lefebvre
Original Article

Abstract

Palaeontological collections housing material from the Fezouata Shale Lagerstätte (Lower Ordovician, Morocco) are of a high scientific interest as they testify to the existence of Burgess Shale-type taxa in one of the most critical Palaeozoic period: the Cambrian–Ordovician transition. The preservation of this unique patrimony can benefit from the emergence of imaging methodologies that have provided innovative ways in three-dimensional (3D) digitization. Computed tomography and photogrammetry were applied in order to create 3D models of fossils from the Fezouata Biota. Tomographic results show the exciting potential of these techniques in internal investigation of fossils, while photogrammetric method enables surface reconstructions with great accuracy in terms of texture, color, and morphology and can be convenient when internal exploration is not required. Three-dimensional digitization techniques thus seem to be reliable methods suited to highlight the potential of palaeontological data housed in museums and make easier the scientific dissemination of information.

Keywords

Fezouata Collections Computed tomography Photogrammetry 

Notes

Acknowledgments

The authors acknowledge Pr. Fabrice Monna (University of Burgundy, Dijon) for the valuable discussion about the photogrammetric software. Pr. Abel Prieur is deeply thanked for the database software handling. Special thanks go also to Youssef Taib, Najib Akka, and Fatim-zahra Ihbach for the kind help with specimen photography, as well as to the anonymous reviewer of the MS, for his constructive and helpful comments. Agisoft Photoscan team is also thanked to have provided us the License Key. We thank the PLATeforme INstrumentale d’Analyse of the IC2MP for the access to the microCT device of the University of Poitiers. Finally, the French region La Nouvelle Aquitaine and the FEDER are also thanked here for their support.

Funding Information

We are grateful to The Académie Hassan II des Sciences et Techniques (Morocco) that largely funded this work. This paper is an outcome of the cooperation program VALORIZ (2012-2015) funded by both the CNRST and the CNRS.

Supplementary material

12371_2019_403_MOESM1_ESM.rar (143.6 mb)
ESM 1 (RAR 147003 kb)

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Copyright information

© The European Association for Conservation of the Geological Heritage 2019

Authors and Affiliations

  • Khaoula Kouraiss
    • 1
    Email author
  • Khadija El Hariri
    • 1
  • Abderrazak El Albani
    • 2
  • Abdelfattah Azizi
    • 1
  • Arnaud Mazurier
    • 2
  • Bertrand Lefebvre
    • 3
  1. 1.Département des sciences de la terre, Faculté des Sciences et TechniquesUniversité Cadi-AyyadMarrakeshMorocco
  2. 2.Institut IC2MP UMR CNRS 7285 (HydrASA)Université de PoitiersPoitiers CedexFrance
  3. 3.UMR CNRS 5276Université Lyon 1Villeurbanne CedexFrance

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