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Cobblestones are stones that were frequently used in the pavement of early streets. "Cobble", the diminutive of the archaic English word "cob", meaning "rounded lump", originally referred any small stone rounded by the flow of water; essentially, a large pebble. It was these smooth "cobbles", gathered from stream beds, that paved the first "cobblestone" streets.
Setts are often idiomatically referred to as "cobbles", although a sett is distinct from a cobblestone by being quarried or shaped to a regular form, whereas cobblestone is generally of a naturally occurring form.
Note that cobble is a generic geological term for any stone having dimensions between 2.5 and 10 inches (6.4 and 25.4 cm). A cobbled area is known as a "causey", "cassay" or "cassie" in Scots (probably from causeway).
Cobblestones are typically either set in sand or similar material, or are bound together with mortar. Paving with cobblestones allows a road to be heavily used all year long. It prevents the build-up of ruts often found in dirt roads. It has the additional advantage of not getting muddy in wet weather or dusty in dry weather. The fact that carriage wheels, horse hooves and even modern automobiles make a lot of noise when rolling over cobblestone paving might be thought a disadvantage, but it has the advantage of warning pedestrians of their approach. In England, the custom was to strew the cobbles outside the house of a sick or dying person with straw to dampen the sound.
Cobblestones set in sand have the environmental advantage of being permeable paving, and of moving rather than cracking with movements in the ground.
Cobblestones were largely replaced by quarried granite setts (also known as Belgian block) in the nineteenth century. The word cobblestone is often wrongly used to describe such treatment. Setts were relatively even and roughly rectangular stones that were laid in regular patterns. They gave a smoother ride for carts than cobbles, although in heavily used sections, such as in yards and the like, the usual practice was to replace the setts by parallel granite slabs set apart by the standard axle length of the time.
Cobblestoned and setted streets gradually gave way to macadam roads, and later to tarmac, and finally to asphalt concrete at the beginning of the 20th century. However, cobblestones are often retained in historic areas, even for streets with modern vehicular traffic. Many older villages and cities in Europe are still paved with cobblestones. In recent decades, cobblestones have become a popular material for paving newly pedestrianised streets in Europe. In this case, the noisy nature of the surface is an advantage as pedestrians can hear approaching vehicles. The visual cues of the cobblestones also clarify that the area is more than just a normal street. The use of cobblestones/setts is also considered to be a more "upmarket" roadway solution, having been described as "unique and artistic" compared to the normal asphalt road environment.
In older U.S. cities such as Philadelphia, Boston, Pittsburgh, New York City, Chicago, San Francisco, Portland, (Maine), Baltimore, Charleston, and New Orleans, many of the older streets are paved in cobblestones and setts (mostly setts); however, many such streets have been paved over with asphalt, which can crack and erode away due to heavy traffic, thus revealing the original stone pavement.
In some places such as Saskatoon, Saskatchewan, Canada, as late as the 1990s some busy intersections still showed cobblestones through worn down sections of pavement. In Toronto streets using setts were used by streetcar routes and disappeared by the 1980s, but still found in the Distillery District.
Many cities in Latin America, such as Buenos Aires, Argentina; Zacatecas and Guanajuato, in Mexico; Old San Juan, Puerto Rico and Montevideo, Uruguay, richly influenced by many European architectural features, are well known for their many cobblestone streets, which are still operational and in good condition. They are still maintained and repaired the old fashion way, by placing and arranging granite stones by hand.
In the Czech Republic, there are old cobblestone paths with colored marbles and limestones. The design with three colors (red/limestone, black/limestone, white/marble) has a long tradition in Bohemia. The cubes of the old ways are handmade.
In the Finger Lakes Region of New York State, the retreat of the glaciers during the last ice age left numerous small, rounded cobblestones available for building. Pre-Civil War architecture in the region made heavy use of cobblestones for walls. Today, the fewer than 600 remaining cobblestone buildings are prized as historic locations, most of them private homes. They are clustered south of Lake Ontario, between Buffalo and Syracuse. There is also a cluster of cobblestone buildings in the Town of Paris, Ontario. In addition to homes, cobblestones were used to build barns, stagecoach taverns, smokehouses, stores, churches, schools, factories, and cemetery markers. The history of building with cobblestones and 17 driving tours to see the remaining structures are found in "Cobblestone Quest - Road Tours of New York's Historic Buildings".
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In cycling road races, cobblestones are used as an additional difficulty for the riders. It requires a certain skill to ride cobblestones efficiently, without falling or getting a flat tire. Tour of Flanders and Paris–Roubaix are notable cobbled classics.
Detail of cobblestone west wall of 1834 Universalist Church in Cobblestone Historic District, Childs, New York.
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