Computed Laminography for the study of biogenic structures in sediment cores: A step between two- and three-dimensional imaging Dorador Rodríguez, Javier Rodríguez Tovar, Francisco J. Charidemou, Miros S.J. Míguez Salas, Olmo Image treatment Non-invasive techniques Internal structures Deep-sea settings Bioturbation This study is supported by Grants TED2021-131697B-C22, and PID2019-104625RB-100 funded by MCIN/AEI/10.13039/501100011033, Grant C-EXP-254-UGR23 funded by Consejería de Universidad, Investigación e Innovación and by ERDF Andalusia Program 2021-2027, and by Research Group RNM-178 funded by Junta de Andalucía. The research by JD was funded through the Ramón y Cajal Fellowship (RYC2021-032385-I) by the Spanish Ministry of Science and Innovation. O M-S is funded by a Humboldt Postdoctoral Fellowship from the Humboldt Foundation, and a Margarita Salas Fellowship from the Ministry of Spain and EU Next Generations projects. We thank the crew and science party of RRS James Cook cruise 231. This work was further supported by the UK Natural Environment Research Council (NERC), through the Climate Linked Atlantic Sector Science project (NE/R015953/1), and it contributes to the Climate Linked Atlantic Sector Science (CLASS) Early Career Researchers project “Bioturbation core analysis of PAP abyssal hill and plains” of O M-S. Funding for open access charge: Universidad de Granada / CBUA. The study of trace fossils —ecological indicators of environmental parameters such as organic-matter content, oxygenation or sedimentation rate, among others— is a powerful tool for analysing cores from deep-sea sediment. However, the visualization of biogenic structures in soft sediment cores is commonly poor. This problem has usually been solved by using X-ray radiographs from core slabs, and later by non-destructive Computed Tomography (CT). Yet the latter requires complex processing and computer resources to deal with a vast dataset. Computed Laminography (CL) stands as an alternative, non-destructive technique able to manage a small amount of data, providing results similar to X-ray radiographs. This technique is frequently used in other disciplines (e.g. material sciences), but rarely applied in geosciences. In the present study, we explore the usefulness of CL for studying the ichnological content of modern deep-sea deposits from boxcores collected from the Porcupine Abyssal Plain (NE Atlantic). Additionally, we compare results from Linear CL (LCL) and Circumferential CL (CCL) to discuss which is recommended depending on the goal involved. The obtained results confirm the usefulness of CL for the ichnological analysis of sediment cores, with similar results from LCL and CCL. However, recommendations are made to resolve doubtful scenarios and to save time. In light of our findings, the use of CL as a non-destructive technique, calling for a much smaller dataset than CT, can be highly recommended for the study of ichnological content or other internal structures. 2024-03-15T08:20:11Z 2024-03-15T08:20:11Z 2024-04 journal article Dorador Rodríguez, J. et al. Computed Laminography for the study of biogenic structures in sediment cores: A step between two- and three-dimensional imaging. Marine Geology 470 (2024) 107267. https://doi.org/10.1016/j.margeo.2024.107267 https://hdl.handle.net/10481/90000 eng http://creativecommons.org/licenses/by-nc-nd/4.0/ open access Attribution-NonCommercial-NoDerivatives 4.0 Internacional Elsevier