Hornfels vs Coal

Hornfels vs Coal Information

Earth’s outer layer is covered by rocks and these rocks have different physical and chemical properties. As two rocks are not same, it’s fun to compare them. You can also know more about Hornfels and Coal Reserves. Hornfels is a metamorphic rock formed by the contact between mudstone or other clay rich rock, and a hot igneous body, and represents a heat altered equivalent of the original rock. Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers called coal beds. These rocks are composed of many distinct minerals. The process of formation of rocks is different for various rocks. Rocks are quarried from many years for various purposes. You can check out Hornfels vs Coal information and Hornfels vs Coal characteristics in the upcoming sections.

Hornfels vs Coal Characteristics

Though some rocks look identical, they have certain characteristics which distinguish them from others. Characteristics of rocks include texture, appearance, color, fracture, streak, hardness etc. Hornfels vs Coal characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Hornfels and Properties of Coal. Learn more about Hornfels vs Coal in the next section. The interior uses of Hornfels include Decorative aggregates, Flooring, Homes and Interior decoration whereas the interior uses of Coal include Not yet used. Due to some exceptional properties of Hornfels and Coal, they have various applications in construction industry. The uses of Hornfels in construction industry include For road aggregate, Roadstone and that of Coal include Cement manufacture, For road aggregate, Making natural cement, Steel production.

More about Hornfels and Coal

Here you can know more about Hornfels and Coal. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Hornfels and Coal consists of mineral content and compound content. The mineral content of Hornfels includes Andalusite and mineral content of Coal includes Analcime, Apatite, Barite, Calcite, Chalcopyrite, Chlorite, Chromite, Clausthalite, Clay Minerals, Crandallite Group, Dolomite, Feldspar, Galena, Gypsum, Marcasite, Muscovite or Illite, Pyrite, Quartz, Siderite, Sphalerite, Zircon. You can also check out the list of all Metamorphic Rocks. When we have to compare Hornfels vs Coal, the texture, color and appearance plays an important role in determining the type of rock. Hornfels is available in brown, dark greenish - grey, green, reddish brown colors whereas, Coal is available in black, brown, dark brown, grey, light to dark grey colors. Appearance of Hornfels is Dull and that of Coal is Veined or Pebbled. Properties of rock is another aspect for Hornfels vs Coal. The hardness of Hornfels is 2-3 and that of Coal is 1-1.5. The types of Hornfels are Biotite hornfels whereas types of Coal are Peat, Lignite, Sub-Bituminous Coal, Bituminous Coal, Anthracite, Graphite. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Hornfels is unknown while that of Coal is black. The specific heat capacity of Hornfels is 0.84 kJ/Kg K and that of Coal is 1.32 kJ/Kg K. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Hornfels is heat resistant, impact resistant, pressure resistant whereas Coal is heat resistant.