Abstract The Verbano–Cusio–Ossola quarrying district (Piedmont, northern Italy) produces many different ornamental stones (granites, gneisses, marbles); two important categories are represented by Serizzo and Beola gneisses. The Serizzo , a group of foliated orthogneisses, is the most important and extensively exploited ornamental stone, largely used to produce columns since the end of fifteenth century and used for many parts of the Duomo di Milano. Beola is the name of a group of heterogeneous orthogneisses with mylonitic foliation and strong mineralogical lineation, easy to split into thin slabs with hammer and chisel, occurring in the middle Ossola Valley. The quarries of Beola are probably the oldest of the Ossola Valley (since the Roman period), and the Beola trade probably started at the end of the thirteenth century. In general, Beola and Serizzo gneisses have been used for ornamental purposes and for the construction of churches, palaces and monuments, widely documented in many towns and villages of the Ossola Valley and in northern Italy. This contribution reviews the history and distinctiveness of these materials, their importance in local and national culture, and their present international diffusion. Both stones are recommended as Global Heritage Stone Resources within a Global Heritage Stone Province.

Abstract This paper reports the results of an Interreg Project (OSMATER – Sub-Alpine Observatory Materials Territory Restoration) that investigated the present and historical quarrying and processing activities in the cross-border area between the Ossola Valley (Italy) and the Canton Ticino (Switzerland), and the use of dimension stones in local and national architecture. These materials are in many ways unique for their abundance and lithological variety. In the past, their extraction, processing and application characterized in a decisive way the architectural and constructive culture, both in terms of prestigious architecture and civil buildings, establishing a relationship between ‘stones and culture’, and ‘territory and its resources’. In recent years, many traditions of the quarrying, processing and architectural activities are losing importance and interest is being loss, resulting in a loss of knowledge and historical memory. The loss of this knowledge is likely to become irreversible in the short term, with the disappearance of people and social groups as depositaries of tradition. We conclude that the creation of an ‘observatory’, like OSMATER, is desirable and, indeed, essential if we want to preserve the historical memory of the stone industry of an entire production area.

Abstract Soil is a component of geodiversity and, for its scientific value, can also be a component of geoheritage, playing a role in reconstructing the environmental evolution of an area. This assumption will be examined here with special reference to mountain environments, where the high variability of soil forming-factors is responsible for a great variety of soil types, contributing to soil diversity and to local geodiversity. To promote soil as an element of geoheritage, we propose a strategy for creating a trail about soil topics in the Buscagna small mountain catchment in the Veglia–Devero protected area (Lepontine Alps, Italy). Geopedological research carried out in the study area has allowed the identification of seven soil profiles as sites of potential pedological interest along already existing hiking paths. The selected soil profiles mirror the main soil types of the area and testify to past environmental conditions and geomorphic dynamics. Among these, two soil profiles are also selected as pedosites. Providing hikers and mountaineers with a proper key to read exposed soils along the Buscagna Valley, the trail allows an increase in awareness of geoheritage conservation with a focus on soil in mountain landscapes, where soil characteristics reflect the influence of compound forming-factors.