Mineralogia di Roma e della sua campagna

ABSTRACT - All updated data of scientific and historical interest on the 15 mineral species first described in Rome and in the surrounding area i.e., from lake Bracciano, to the North, to lake Nemi, to the South, are assembled and discussed. Their typical morphologies are also presented as photographs. In addition, a full list of all minerals described over the area is given. A distinction is made between minerals occurring as euhedral, conspicuous crystals and those present as rock forming grains. Most minerals are discussed with reference to their significance for establishing the pressure and temperature conditions at which they formed, with special attention for those occurring in the lavas and pyroclastics related either to the Sabatini volcanic complex or to the Alban Hills volcano, both belonging to the world-renowned Roman Comagmatic Region. The few sedimentary minerals of palaeomagnetic and geothermal significance in the Tiber valley and in ancient lakes and ponds scattered through the Roman campaign are also listed and briefly discussed.