Erratic blocks are the main geosites in Turin's suburban area. Today, they are a symbol of the ‘landscape to be saved’ even for those who are barely aware of their geological importance. This is because the blocks are the subject of myths (based on their geomorphological characters), such as: interpretation of weathering as altars or runic writing: attribution of strange shapes, noises, lairs, to petrified supernatural beings: interpretation of isolated blocks as dwellings of protector beings; use of the blocks for boulders: supposed reports of UFOs and ‘disappeared civilizations’. In ancient times, erratic blocks were at the centre of religious practices. However, most myths are in fact recent. The Barbarian invasions and the fight against Paganism destroyed the ancient myths. The creation of new myths proves that erratic blocks are able to attract mankind's attention in every epoch. When the geologist proposes blocks as protected geosites, he must show the connection between geomorphology and myths, maintaining the suggestive impact of the myths. Myths, including recent and altered ones, can work together with scientific explanation to make it easier for the public to understand the true importance of erratic blocks. By exploiting the power and appeal of myth, the community will more easily accept the need to preserve scientifically valuable geosites.

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This work presents physical, petrographic and mechanical characteristics of basalt aggregates from Serra Geral Formation in the State of Santa Catarina, Brazil, used as layers of simple graded crushed stone in pavement. The simple graded crushed stone chosen for the study was obtained from a quarry in the municipality of São José do Cerrito/SC, located in the mountainous region of Santa Catarina. The aggregates of this quarry were used to pave a segment of highway BR-282/SC from 2002 to 2006. This study presents the results of thin section analysis, which identifies the mineralogical composition of the material and clarifies aspects associated with the rock texture. In addition, resilient modulus tests are conducted, followed by numerical evaluation of the pavement’s structural behavior, field evaluation of elastic displacement with Benkelman beam testing, and comparison of the results. The entire highway segment was monitored throughout its implementation and was determined to be in good condition. The material used offers good performance as a pavement layer. Moreover, the methodology used for the design presents good correlation with the field tests.

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