Terra Negra: un sòl sobre pissarres al Montnegre

Montnegre’s mountain range boasts a large variety of landscapes because of the spatial variability of its geological materials. Its parent materials are comprised of igneous and metamorphic rocks, mainly granites, shales and phyllites with small incursions of calcareous and basaltic rocks. As a result, Montnegre also presents a certain diversity of soil types. Very close to Sant Martí de Montnegre we can find one of the most geologically interesting sites in Montnegre, the so called Terra Negra, surely named this way because of the colour of its rocks and soils. Terra Negra is located on a doughnut-like incursion of black shale, dating from the Carboniferous Period, rounded mainly by phyllites and hornfels and by granite at the north side. On the 11th of April 2015 we carried out a field exploration of the location to collect soil data and samples for further analyses in the laboratory. Therefore, the main aim of this paper is to present the data we have collected from the soil of Terra Negra. Finally, with the available data, we discuss some of the properties of the soil and their effects on the local plant community.