21. July 2013 · Comments Off on Slate Rock · Categories: News

Name of rock, mineral or stone slate type basic sedimentary rock; fossil rock group silicates: micaceous schist Crystal system / structure presents a foliated structure chemical composition by virtue of that slate contains quartz, micas, clay minerals and feldspars, the chemical composition of it depends on the quantity of ore that abound in the rock. It consists of mud and barrage. Another source of information we find that the minerals that form slate are mainly quartz and Muscovite. Training or origin comes from the transformation of the sedimentary rocks subjected to strong pressures that come from Teutonic pressures (e.g., the formation of mountains). External of the halos of contact forms in the area and they often Shales towards corneal. Slate is formed when the clay minerals constituting fine-grained rocks, as the pelita is transformed into mica or chlorite. By joining the core group of sedimentary rocks, slate is formed in any place that has sand, sludge deposits and sediments; These unite and form rocks comprising various modes and types of rocks, among them is the slate. Also called fossil rock.

Hardness hard texture shaley and fine grains. Compact and does not undergo appreciable weathering. Indensa density, with fine grains formed by metamorphism of micaceous shale, clay or, less frequently, of igneous rocks medium to dark gray Color, green color of the feces of wine, purple, Brown and black. Brightness brightness is opaque. Satin properties contains particles of quartz and Muscovite, forming a type of mica; biotite, chlorite and the Hematite. They have internal foliation, its tabular geometry is limited by two flat sides. The predominant color in Slate, shows the dominant mineral, as well as the oxidation process that was exposed. He suffers no weathering, widespread resistance, durability, versatility and impermeability. It is waterproof, its main feature is its division into fine foil or layers. Uses a few decades ago, slate was an element important in the classroom and in school children portfolios.

Comments closed.