Early diagenetic transformation stages revealed by micro-analytical studies of shelly phosphorites, Rakvere regionGraul, Sophie Jane Marie-Pascale Huguette; Kallaste, Toivo; Moilanen, Marko; Ndiaye, Mawo; Hints, RuttEstonian journal of earth sciences2023 / p. 34–37 : ill https://doi.org/10.3176/earth.2023.12