Some minerals, such as quartz grains, are flattened and stretched, while clay minerals are recrystallised as platy minerals: white mica and chlorite. The quartz minerals give the slate strength and durability, while the platy minerals form cleavage planes, which do not correspond to the bedding planes, but which allow the rock to be split into much thinner slabs suitable as roofing material.
Differences in the composition of the original mudstone and the degree of metamorphism affect the quality of the slates thus produced. Slate has a long tradition as a construction material. Slate is a natural, aesthetically pleasing stone. Its strength and outstanding resilience make it one of the most durable and versatile roofing materials. The beauty of slate lies in the fact that it is a natural resource that requires little alteration from its natural form and offers a long lasting, pollutant resistant, fireproof, waterproof material with a warmth and elegance which places it in a league of its own.
The age of the slate stone varies depending on the regional geology. For example in Scotland, Ballachulish slate was formed from sediments laid down approximately million years ago and was metamorphosed million years ago, while Spanish slate from the Orense area was formed from muds laid down over million years ago and was metamorphosed — million years ago.
The mineral composition of slate includes pyrite, chlorite, biotite, muscovite and quartz. It also contains but in less frequency magnetite, zircon, feldspar and tourmaline. Slate is resistant to stains, acid spills and fire. Commercially available slate is in the form of Vermont slate tiles, Indian slate and Chinese slate.
Slate rock is used in the construction industry to make roofing shingles and coverings. Slate roofs can last hundreds of years. An example is the Westminster Hall in London, England, that was finished with a slate roof in the Thirteenth Century; the same roof stands as of April, Slate is ecologically sound and its use does not harm the environment.
There are various types of slate roof coverings, including triple, double, scales, French, triple rounded without corners and Abbadini.
Slate is used for external flooring, internal flooring and cladding. Slate floors are commonly laid in outdoor porches, basements, bathrooms and kitchens.
Slateplate products are not microwave or oven safe. Slate can contain trace metals within the stone, and uneven heating in a microwave or oven may cause the slate to break. You can pre-heat your Slate p late in a warming oven at F or less. You can pre-cool your Slate p late in the freezer or refrigerator.
As mentioned, slate is widely used as a roofing material. It is an efficient roofing material because it can be cut into very thin sheets.
It also absorbs minimal water absorption index being 0. It is also favored for its resistance to moisture and good insulating capability. Roofs made of slate can last for hundreds of years. However, slate is quite more expensive than other available roofing materials, and its installation cost more as well.
Hence, the use of slate in the more recent times has been mainly restricted to high-end projects and prestige architecture. Slate is also used for outdoor and indoor flooring, and cladding. Floorings of porches, basements, bathrooms, and kitchens, can be made of slate. They are very durable, elegant-looking, and require less maintenance. Some slates that are used for indoor flooring have a wide variety of finishes, patterns, shapes, and colors. Landscaping also make use of slate rocks, taking advantage of its resistant property to weather and pollution.
Pavements, swimming pools, patios, and even contemporary fountains make use of slate either as a primary material or decorative stone. Slate can also be used as billiard table tops, commemorative tablets, and tombstones. Home Everything you need to know about Slate Everything you need to know about Slate. Slate is considered as the finest grained foliated metamorphic rock. Metamorphic rocks are formed from the change in form of existing rocks, a process called metamorphism. Slate arises from the repetitive layering or foliation of metamorphic rocks, particularly through the low-grade metamorphism of shale or mudstone.
It is widely used in building roofs and floors, for it being fireproof and a good electrical insulator. It has also been popular in the use for billiard table tops, blackboards, tombstones, and commemorative tablets. It is widely used as a roofing material because of its low water absorption index of less than 0. Slate is derived from shale-type sedimentary rock of clay or volcanic ash that underwent low-grade regional metamorphism.
In the past, the terms "slate" and "shale" have been used interchangeably. In the modern usage, geologists say shale is converted into slate. However, if you're looking at a partially metamorphosed rock, it's difficult to say whether it should be categorized as slate or as shale. One way to tell shale and slate apart is to strike it with a hammer.
Slate emits a "tink" or a ring when struck. Shale and mudstone produce a dull thud. A sheet of smooth stone used for writing might be referred to as a "slate," regardless of its composition.
In addition to slate, writing boards have been made using soapstone or clay. American coal miners may refer to the shale forming the floor and ceiling of a mine as slate. Fragments of shale separated from coal during processing may also be called slate. Although technically incorrect, the language is traditional.
Compared to other metamorphic rocks, slate forms under relatively low temperature and pressure. This makes it a good for fossil preservation. Even delicate structures may be preserved and readily discerned against the fine grain of the rock.
However, the foliation pattern of slate can shear fossils or distort them when the rock cleaves. Actively scan device characteristics for identification. Use precise geolocation data. Select personalised content.
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