A quarry is a type of open-pit mine in which dimension stone, rock, construction aggregate, riprap, sand, gravel, or slate is excavated from the ground. The operation of quarries is regulated in some jurisdictions to manage their safety risks and reduce their environmental impact.
The word quarry can also include the underground quarrying for stone, such as Bath stone.
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Gunpowder, also commonly known as black powder to distinguish it from modern smokeless powder, is the earliest known chemical explosive. It consists of a mixture of sulfur, charcoal (which is mostly carbon), and potassium nitrate (saltpeter). The sulfur and charcoal act as fuels, while the saltpeter is an oxidizer. Gunpowder has been widely used as a propellant in firearms, artillery, rocketry, and pyrotechnics, including use as a blasting agent for explosives in quarrying, mining, building pipelines, tunnels, and roads.
Gunpowder is classified as a low explosive because of its relatively slow decomposition rate, low ignition temperature and consequently low brisance (breaking/shattering). Low explosives deflagrate—burning at subsonic speeds—whereas high explosives detonate, producing a supersonic shockwave. Ignition of gunpowder packed behind a projectile generates enough pressure to force the shot from the muzzle at high speed, but usually not enough force to rupture the gun barrel. It thus makes a good propellant but is less suitable for shattering rock or fortifications with its low-yield explosive power. Nonetheless, it was widely used to fill fused artillery shells (and used in mining and civil engineering projects) until the second half of the 19th century, when the first high explosives were put into use.
Balıkesir Province (Turkish: Balıkesir ili) is a province and metropolitan municipality in northwestern Turkey with coastlines on both the Sea of Marmara and the Aegean. Its area is 14,583 km, and its population is 1,276,096 (2024). Its adjacent provinces are Çanakkale to the west, İzmir to the southwest, Manisa to the south, Kütahya to the southeast, and Bursa to the east. The provincial capital is Balıkesir. Most of the province lies in the Marmara Region except the southern parts of Bigadiç Edremit, Kepsut, İvrindi, Savaştepe and Sındırgı districts and ones of Ayvalık, Burhaniye, Dursunbey, Gömeç and Havran, that bound the Aegean Region. Kaz Dağı (pronounced [kaz daːɯ]), known also as Mount Ida, is located in this province. Balıkesir province is famous for its olives, thermal spas, and clean beaches, making it an important tourist destination. The province also hosts immense deposits of kaolinite and borax, with some open-pit mines. The Kaz mountains are also threatened with the expansion of gold mining using cyanide which puts the villagers' lives, the agricultural economy, and tourism at risk.
The Colosseum (/ˌkɒləˈsiːəm/ KOL-ə-SEE-əm; Italian: Colosseo [kolosˈsɛːo], ultimately from Ancient Greek word "kolossos" meaning a large statue or giant) is an elliptical amphitheatre in the centre of the city of Rome, Italy, just east of the Roman Forum. It is the largest ancient amphitheatre ever built, and is the largest standing amphitheatre in the world. Construction began under the Emperor Vespasian (r. 69–79 AD) in 72 and was completed in AD 80 under his successor and heir, Titus (r. 79–81). Further modifications were made during the reign of Domitian (r. 81–96). The three emperors who were patrons of the work are known as the Flavian dynasty, and the amphitheatre was named the Flavian Amphitheatre (Latin: Amphitheatrum Flavium; Italian: Anfiteatro Flavio [aɱfiteˈaːtro ˈflaːvjo]) by later classicists and archaeologists for its association with their family name (Flavius).
The Colosseum is built of travertine limestone, tuff (volcanic rock), and brick-faced Roman concrete. It could hold an estimated 50,000 to 80,000 spectators at various points in its history, having an average audience of some 65,000; it was used for gladiatorial contests and public spectacles including animal hunts, executions, re-enactments of famous battles, dramas based on Roman mythology, and briefly mock sea battles. The building ceased to be used for entertainment in the early medieval era. It was later reused for such purposes as housing, workshops, quarters for a religious order, a fortress, a quarry, and a Christian shrine.
Gross regional domestic product (GRDP), gross domestic product of region (GDPR), or gross state product (GSP) is a statistic that measures the size of a region's economy. It is the aggregate of gross value added (GVA) of all resident producer units in the region, and analogous to national gross domestic product. The GRDP includes regional estimates on the three major sectors including their sub-sectors, namely:
"The GRDP is usually presented in nominal and real terms. Nominal GRDP measures the value of the outputs of the economy at current prices. Real GRDP referred to as GRDP at constant prices, measures the value of an economy's output using the prices of a fixed base year. The real GRDP is useful in capturing real output growth since inflationary effects have been removed. It is, therefore, the most widely used measure of real income."
Dimension stone is natural stone or rock that has been selected and finished (e.g., trimmed, cut, drilled or ground) to specific sizes or shapes. Color, texture and pattern, and surface finish of the stone are also normal requirements. Another important selection criterion is durability: the time measure of the ability of dimension stone to endure and to maintain its essential and distinctive characteristics of strength, resistance to decay, and appearance.
Quarries that produce dimension stone or crushed stone (used as construction aggregate) are interconvertible. Since most quarries can produce either one, a crushed stone quarry can be converted to dimension stone production. However, first the stone shattered by heavy and indiscriminate blasting must be removed. Dimension stone is separated by more precise and delicate techniques, such as diamond wire saws, diamond belt saws, burners (jet-piercers), or light and selective blasting with detonating cord, a weak explosive.
Construction aggregate, or simply aggregate, is a broad category of coarse to medium-grained particulate material used in construction. Traditionally, it includes natural materials such as sand, gravel, and crushed stone. As with other types of aggregates, it is a component of composite materials, particularly concrete and asphalt.Aggregates are the most mined materials in the world, being a significant part of the 6 billion tons of concrete produced per year.
Aggregate serves as reinforcement to add strength to the resulting material. Due to the relatively high hydraulic conductivity as compared to most soil types, aggregates are widely used in drainage applications such as foundation and French drains, septic drain fields, retaining wall drains, and roadside edge drains. Aggregates are also used as base material under building foundations, roads and railroads (aggregate base). It has predictable, uniform properties, preventing differential settling under the road or building.
Icacos Cay (Spanish: Cayo Icacos) is the largest uninhabited cay forming part of a small chain of cays, reefs, and skerries located off the coast of the barrio of Cabezas in the municipality of Fajardo in the northeast of the main island of Puerto Rico. Along with Palominos island, it is part of the La Cordillera Reef Nature Reserve and under the jurisdiction of the Department of Natural Resources and Environment. Icacos is a fifteen-minute water taxi ride from Fajardo. The cay is a popular snorkeling and beach tourism destination.
For some time, there was a limestone quarry on the southern part of the island, with a short railroad system to shuttle limestone from the quarry to the pier.
The Cotswolds (/ˈkɒtswoʊldz, ˈkɒtswəldz/ KOTS-wohldz, KOTS-wəldz) is a region of South West and South East England with small parts extending into the West Midlands, along a range of wolds or rolling hills that rise from the meadows of the upper River Thames to an escarpment above the Severn Valley and the Vale of Evesham. The area is defined by the bedrock of Jurassic limestone that creates a type of grassland habitat that is quarried for the golden-coloured Cotswold stone. It lies across the boundaries of several English counties: mainly Gloucestershire and Oxfordshire, and parts of Wiltshire, Somerset, Worcestershire, and Warwickshire. The highest point is Cleeve Hill at 1,083 ft (330 m), just east of Cheltenham. The predominantly rural landscape contains stone-built villages, towns, stately homes and gardens featuring the local stone.
A large area within the Cotswolds has been designated as a National Landscape (formerly known as Area of Outstanding Natural Beauty, or AONB) since 1966. The designation covers 787 square miles (2,038 km), with boundaries roughly 25 miles (40 km) across and 90 miles (140 km) long, stretching south-west from just south of Stratford-upon-Avon to just south of Bath, making it the largest National Landscape area and England's third-largest protected landscape.
Paros (/ˈpɛərɒs/; Greek: Πάρος [ˈparos]; Venetian: Paro) is a Greek island in the central Aegean Sea and part of the Cyclades island group. It lies 8 kilometers (5 miles) west of Naxos, separated by a narrow channel and about 150 km (93 miles) south-east of Piraeus. The Municipality of Paros covers about 196.308 square kilometres (75.795 sq mi), including numerous uninhabited offshore islets. Its closest neighbor is the municipality of Antiparos, located to the southwest. In ancient Greece, the island was home to the city-state of Paros.
Historically, Paros was known for its fine white marble, which gave rise to the term Parian to describe marble or china of similar qualities. Today, working marble quarries and mines (as well as abandoned ones) can be found on the island, but Paros is primarily known as a popular tourist spot.