El estratotipo mundial del Santoniense en Olazagutía Curiosity · Olazti/Olazagutía, Sakana, Navarra Image of Olazti/Olazagutía, not of the place itself. In 2013, the International Union of Geological Sciences established, in the territory of Olazagutía, the Global Boundary Stratotype Section and Point (GSSP) for the Santonian stage, a worldwide reference point for dating that stage of the Upper Cretaceous. 2013 Photo: Ibai1984 (CC BY 4.0) What to see and do in Olazti/Olazagutía