• 2023. G. Bonarelli, Il territorio di Gubbio - Notizie geologiche, Roma 1891 G. Parisi, F. Piergiovanni e M. Marcucci, Il livello Bonarelli nell'area...
    98 KB (10,162 words) - 07:35, 3 June 2024
  • Cenomanian–Turonian boundary that crops out near Gubbio is termed the 'Livello Bonarelli' after the scientist who first described it in 1891. More minor oceanic...
    41 KB (5,019 words) - 09:46, 2 June 2024