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      Multi-aged social behaviour based on artiodactyl tracks in an early Miocene palustrine wetland (Ebro Basin, Spain) 

      Díaz Martínez, Ignacio; Suárez Hernando, Oier; Larrasoaña Gorosquieta, Juan Cruz; Martínez García, Blanca María; Baceta Caballero, Juan Ignacio ORCID; Murelaga Bereicua, Javier (Nature, 2020-01-24)
      We present a new locality with at least 880 vertebrate tracks found at the top of a limestone bed from the lower Miocene Tudela Formation (Spain). The trampled surface was formed by artiodactyls that crossed a muddy carbonate ...
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      Why Do Bio-Carbonates Exist? 

      Pomar, Luis; Hallock, Pamela; Mateu Vicens, Guillem; Baceta Caballero, Juan Ignacio ORCID (MDPI, 2022-11-03)
      Calcium carbonate precipitation associated with biotic activity is first recorded in Archaean rocks. The oldest putative fossils related to hydrothermal vents have been dated at ~3.77 Ga (possibly 4.29 Ga). Stromatolites, ...