Abstract The Pliocene fossiliferous succession of the Volterra hill, a prominent place in Tuscany, Italy and, since the Renaissance, the site of important archaeological finds of the ancient Etruscan civilization, has formed the object of enquiry over six centuries of research on the inner nature of the Earth system. The works of Restoro d'Arezzo, Leonardo da Vinci, Nicolaus Steno, Giovanni Targioni, Nicolas Desmarest, Giambattista Brocchi, Alexandre Brongniart and Charles Lyell testify to the early recognition through fieldwork that those strata with seashells had formed at the bottom of the sea. This interpretation served different approaches to knowledge. Restoro, Leonardo and Steno, spanning nearly four centuries in the history of science (1282–1669), including the ‘Copernican Revolution’ and the start of the Modern Age, relied also on textual sources and trusted a speculative model of the Earth's interior, so that at Volterra they focused on vertical movements of the earth–water system. The authors of the eighteenth and nineteenth centuries abandoned pre-built young-Earth models and emphasized the geography of ancient Tuscany. Brocchi, Brongniart and Lyell promoted the taxonomic use of seashells to correlate rocks across Europe. This place deserves higher standards of valorization to promote understanding of the history and sociology of ideas.

Abstract Large boulders, up to several metres in diameter and mainly made up of metamorphic rocks, are scattered throughout the Torino Hill in NW Italy. These boulders were originally included in Oligocene–Miocene conglomerate beds and were released by alteration of the host rock at the surface. In the past two centuries, their origin and mechanisms of emplacement in the conglomerate bodies were largely debated by both Italian and foreign geologists. Some of the boulders had been given proper names by the local people and had become the object of legends and rituals. Moreover, in the past, the boulders had an economic value, being used as construction stones or exploited to produce aggregates, lime and millstones. This, together with the progressive urbanization of the area, caused the disappearance of many of the large boulders once present on the Torino Hill. The remaining ones are presently not appreciated and are almost forgotten, even though they represent an invaluable geoheritage and deserve rediscovery and protection.

Abstract The northernmost coastal sector of the Italian peninsula from the La Spezia Gulf to Monte Pisano, including the Alpi Apuane mountain range, represents a special morpho-structural domain of the inner northwestern Apennines. Described by naturalists since the Roman age, its location on the land and sea track of the Italian Grand Tour makes it a special zone in the Italian peninsula that was visited by some of the most eminent European geologists of the nineteenth century, including Brongniart, Buckland, De la Beche, Hoffman, Escher von der Linth, Murchison and Lyell. The area has been also the homeland of naturalists and scientists who played a significant role during the nineteenth century in the advancement of geological studies in Italy. Thanks to Capellini's ‘Geological map of the La Spezia Gulf and surroundings’ (1863) and Zaccagna's ‘Geological maps of the Alpi Apuane’ (1879–97), the area became central in the history of the foundations of modern Italian geological maps. However, the opportunities provided by early mapping and palaeontological discoveries for developing tectonic concepts were squandered by Italian Apennines geologists, who remained stuck on explanations of autochthonism, thus missing an early recognition of nappe tectonics that was only accepted in the middle of the twentieth century.