The units are also verified that understand the Mountain range of the Currency and Mountain range of the Serrinhas in the portion west of the city. Units of the New Group Rasp, which possesss mineradora activity, enclose great part of Itabirito and are next to the urban area. The geology of the city of Itabirito is composed for different units. How if it sees in the map, the excellent characteristics of these areas consist of the PICTURE 2.Quadro 2? Geologic-geotcnica characterization of geologic the geologic units of Itabirito.Unidades GeolgicasCaractersticas and geotcnicasProterozicoSupergrupo MinasGrupo PiracicabFormao BarreiroFilito and grafitoso filito. Difficult compacting. Average cohesion.
Permeability low. Fast superficia draining. Generally poor stability for foundations, being able to suffer expansion-contraction with the variation from the humidity. Poor, controlled slope stability for the attitude of the foliao, breakings and degree of intemperismo. Formation Latch of the argillaceous FunilFilitos dolomticos and, and marble.
Easy compacting the moderately difficult. Cohesion low the average. Average Erodibilidade. Permeability low. Fast superficial draining the moderate one. Stability stops foundations poor the moderate one, being able sofrerexpanso-contraction with the humidity variation. Rotten slope stability the good one. Ferruginoso CercadinhoQuartzito formation with filito intercalations, dolomito more rare. Very difficult compacting. Cohesion low the average. Average Erodibilidade. Permeability low the high one. Moderate superficial draining the slow one. Moderate stability for foundations the good one. Poor slope stability, which had to the intense fraturamento of the rocks. (It continues) Picture 2? Geologic-geotcnica characterization of the geologic units of Itabirito (continuation). Geologic GeolgicasCaractersticas units and geotcnicasProterozicoSupergrupo MinasGrupo ItabirFormao GandarelDolomitos associates the itabirito and filito, magnesiano calcareous rock. Declivity low the average. Very difficult compacting. High cohesion. Erodibilidade low the average. Permeability low. Fast superficial draining. Good stability for foundations. Slope stability good the very good one. Hemattico CauItabirito formation, hematite and dolomita. Difficult compacting. Average declivity. Cohesion low the high one depending on the presence of hematite, quartz and degree of alteration. Erodibilidade low the average. High permeability. Moderate superficial draining the slow one. Very good stability for foundations. Poor slope stability good, the controlled one for the altitude of the acamamento, breakings and friabilidade. Group CaraFormao MoedQuartzitos, conglomerates and filitos (ff). Sources of moderate declivity the high one. Erodibilidade low. Average permeability the high one. Moderate superficial draining the slow one. Good stability for foundations the very good one. Good slope stability the very good one in cool rocks, but plain of breaking desconfinados can cause to fall of blocos.ArqueanoSupergrupo River of the New VelhasGrupo LimUnidade Catherine Mendes, Stream of the Paina, Stream of the associated StioQuartzo,.