CALIBRATION OF THE PLIENSBACHIAN-TOARCIAN CALCAREOUS NANNOFOSSIL ZONE BOUNDARIES BASED ON AMMONITES (BASQUE-CANTABRIAN AREA, SPAIN). RIPS [Internet]. 31 marzo 2004 [citato 28 luglio 2026];110(1). Disponibile su: https://test-ojs-unimi-it.archicoop.it/index.php/RIPS/article/view/6271