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Study Guide: Dry Stone Construction: Principles, History, and Global Practice

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Dry Stone Construction: Principles, History, and Global Practice Study Guide

Principles and Terminology of Dry Stone Construction

Dry stone construction relies on mortar to bind stones together, providing structural integrity.

Answer: False

Explanation: Dry stone construction is fundamentally defined by the absence of mortar, relying instead on the precise interlocking of stones for stability.

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In the United States, dry stone construction is commonly referred to as dry laid, while in Scotland, it is known as drystack or drystane.

Answer: True

Explanation: The flashcard explicitly states that 'dry laid' is used in the USA, and 'drystack or drystane' in Scotland, as alternative names for dry stone construction.

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Ancient Greek temples, built with precisely-shaped stones without mortar, are considered a prime example of traditional dry stone walling.

Answer: False

Explanation: The term 'dry stone' typically excludes historic styles like ancient Greek temples, which, despite being mortarless, relied on highly refined stone cutting and fitting rather than the rustic interlocking of unshaped stones.

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Dry stone techniques are exclusively used for constructing walls and terracing.

Answer: False

Explanation: Beyond walls and terracing, dry stone techniques are also employed for constructing shelters, houses, sculptures, buildings, fortifications, and bridges, demonstrating a wide range of applications.

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What is the fundamental characteristic of dry stone construction?

Answer: It relies on the careful selection and interlocking of stones without mortar.

Explanation: Dry stone construction is fundamentally defined by the absence of mortar, relying instead on the careful selection and interlocking of stones for structural integrity.

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Which of the following is an alternative name for dry stone construction used in Scotland?

Answer: Drystane

Explanation: In Scotland, dry stone construction is commonly referred to as drystack or drystane, as well as dykes for field boundaries.

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What type of historic construction style is explicitly *not* typically referred to as 'dry stone' despite being mortarless?

Answer: Ancient Greek temples

Explanation: The term 'dry stone' is generally reserved for structures built with unshaped or minimally shaped stones, distinguishing it from precise, mortarless masonry like that found in ancient Greek temples or Inca architecture.

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Beyond walls and terracing, which of these structures is *not* mentioned as being built using the dry stone technique?

Answer: Skyscrapers

Explanation: Dry stone techniques are applied to a variety of structures including shelters, houses, sculptures, buildings, fortifications, and bridges, but not skyscrapers.

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Historical Development and Global Manifestations

The earliest known dry stone wall constructions in north-west Europe date back to the Bronze Age.

Answer: False

Explanation: Some dry stone wall constructions in north-west Europe, such as a field system in County Mayo, Ireland, have been carbon-dated to the Neolithic Age, specifically 3800 BC.

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The cyclopean walls of Mycenae in Greece were constructed around 1350 BC.

Answer: True

Explanation: The cyclopean walls of the acropolis of Mycenae, Greece, are dated to 1350 BC, representing an early form of mortarless construction.

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Daorson, an ancient settlement in Bosnia and Herzegovina, features cyclopean walls dated to the 4th century BCE.

Answer: True

Explanation: Daorson, an ancient settlement in Bosnia and Herzegovina, is known for its cyclopean walls, which are dated to the 4th century BCE.

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The Mayan ruins at Lubaantun in Belize demonstrate dry stone construction during the 12th and 13th centuries AD.

Answer: False

Explanation: The Mayan ruins at Lubaantun in Belize showcase dry stone construction during the 8th and 9th centuries AD, not the 12th and 13th centuries.

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Great Zimbabwe is a dry stone city complex in Africa constructed between the 11th and 15th centuries AD.

Answer: True

Explanation: Great Zimbabwe is indeed a large acropolis-like city complex in Africa, constructed using dry stone methods between the 11th and 15th centuries AD.

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The Mourne Wall is a 22-mile wall located in County Down, Northern Ireland, built using dry stone methods.

Answer: True

Explanation: The Mourne Wall, a significant 22-mile (35 km) structure in the Mourne Mountains of County Down, Northern Ireland, is a prominent example of dry stone construction.

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Iron Age fortifications like Eketorp Castle in Sweden and Maiden Castle in North Yorkshire utilized dry stone construction.

Answer: True

Explanation: During the Iron Age, dry stone techniques were indeed employed for fortifications such as Eketorp Castle in Sweden and Maiden Castle in North Yorkshire, among others.

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Many existing dry-stone walls in Scotland date back to the 14th century or earlier, primarily for field division.

Answer: True

Explanation: Many dry stone walls in Scotland date back to the 14th century or earlier, serving primarily as essential agricultural boundaries for field division and livestock retention.

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An ancient platform-style monument in northeastern Somalia is characterized by a high, circular dry stone wall.

Answer: False

Explanation: The ancient platform-style monument in northeastern Somalia is characterized by a low, rectangular dry stone wall, not a high, circular one.

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An entire field system made from dry stone walls in County Mayo, Ireland, has been carbon-dated to what period?

Answer: 3800 BC

Explanation: A significant dry stone field system in County Mayo, Ireland, provides evidence of Neolithic construction, carbon-dated to 3800 BC.

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The cyclopean walls of the acropolis of Mycenae, Greece, are dated to approximately what year?

Answer: 1350 BC

Explanation: The cyclopean walls of Mycenae, characterized by massive, irregularly shaped boulders, are dated to approximately 1350 BC.

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Daorson, an ancient settlement in Bosnia and Herzegovina, is known for its cyclopean walls dated to which century?

Answer: 4th century BCE

Explanation: The cyclopean walls of Daorson in Bosnia and Herzegovina, an early example of dry stone construction in the region, are dated to the 4th century BCE.

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During which centuries did the Mayan ruins at Lubaantun in Belize showcase the use of dry stone construction?

Answer: 8th and 9th centuries AD

Explanation: The Mayan ruins at Lubaantun in Belize demonstrate the application of dry stone construction techniques during the 8th and 9th centuries AD.

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Great Zimbabwe, a large acropolis-like city complex, was constructed using dry stone methods between which centuries?

Answer: 11th and 15th centuries AD

Explanation: Great Zimbabwe, a significant dry stone city complex in Africa, was built between the 11th and 15th centuries AD, showcasing advanced dry stone architecture.

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Which of the following is a notable example of a dry stone wall mentioned as a 22-mile structure in County Down, Northern Ireland?

Answer: The Mourne Wall

Explanation: The Mourne Wall, a remarkable 22-mile (35 km) dry stone structure in County Down, Northern Ireland, is a prominent example of large-scale dry stone construction.

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Which of the following Iron Age fortifications utilized dry stone construction?

Answer: Eketorp Castle in Sweden

Explanation: Eketorp Castle in Sweden is cited as an Iron Age fortification that employed dry stone construction techniques, alongside others like Maiden Castle.

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Many existing dry-stone walls in Scotland date back to what period?

Answer: 14th century or earlier

Explanation: A significant number of existing dry stone walls in Scotland have historical origins dating back to the 14th century or even earlier, primarily serving as agricultural boundaries.

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The ancient platform-style monument in northeastern Somalia is described as having what shape?

Answer: Rectangular

Explanation: The ancient platform-style monument in northeastern Somalia is characterized by a low, rectangular dry stone wall, distinguishing it from other forms.

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Regional Adaptations and Cultural Heritage

UNESCO recognized the art of dry stone walling as intangible cultural heritage in 2018, specifically including countries such as France, Italy, and Spain.

Answer: True

Explanation: The art of dry stone walling was inscribed on the UNESCO representative list of intangible cultural heritage in 2018, specifically including France, Greece, Italy, Slovenia, Croatia, Switzerland, and Spain.

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Ireland was added to the UNESCO list for dry stone wall construction in 2020.

Answer: False

Explanation: Ireland was added to the UNESCO representative list for its dry stone wall construction in 2024, not 2020.

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In Scotland, professional builders of dry stone walls are known as 'wallers'.

Answer: False

Explanation: In Scotland, professional builders of dry stone walls are referred to as 'dykers', while 'wallers' is a more general term for dry stone craftsmen, particularly in the UK context.

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Dry stone walls are particularly abundant in the lowland areas of Britain and Ireland.

Answer: False

Explanation: Dry stone walls are characteristic of the upland areas of Britain and Ireland, particularly in the West of Ireland, where natural rock is plentiful.

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Dry stone constructions are common in areas like The Burren because hedges grow reliably there, making stone walls an aesthetic choice.

Answer: False

Explanation: Dry stone constructions are common in areas like The Burren precisely because environmental conditions are too harsh for hedges to grow reliably, making stone walls a practical necessity for boundaries.

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Dry stone walls in the United States are primarily found in the Pacific Northwest and the desert Southwest.

Answer: False

Explanation: In the United States, dry stone walls are common in regions such as New England, New York, Pennsylvania, central Kentucky, and the Ozarks, not primarily the Pacific Northwest or desert Southwest.

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French and German immigrants were primarily responsible for introducing dry stone construction techniques to America.

Answer: False

Explanation: Dry stone construction techniques were primarily introduced to America by English and Scots-Irish immigrants.

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The dry stone technique was adopted in Australia, specifically western Victoria and parts of Tasmania.

Answer: True

Explanation: The dry stone technique was indeed adopted in Australia, particularly in western Victoria, parts of Tasmania, and areas around Kiama in New South Wales.

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In Croatia, 'suhozidi' were built to clear land for agriculture, delineate ownership, and provide shelter against the strong bora wind.

Answer: True

Explanation: In Croatia, 'suhozidi' (dry stone walls) served multiple practical purposes, including clearing land for agriculture, marking property boundaries, and offering protection from the strong bora wind.

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The island of Baljenac in Croatia is notable for having 23 kilometers of dry stone walls across its small area.

Answer: True

Explanation: Baljenac, a small Croatian island, is indeed remarkable for its extensive network of 23 kilometers (14 miles) of dry stone walls within its 14-hectare area.

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In Great Britain and Ireland, small dry stone structures are sometimes called cairns and are used as road and mountaintop markers.

Answer: True

Explanation: Small dry stone structures, often called cairns in Scotland, are indeed used as road and mountaintop markers in Great Britain, Ireland, and other countries.

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In what year was the art of dry stone walling inscribed on the UNESCO representative list of intangible cultural heritage?

Answer: 2018

Explanation: The art of dry stone walling was inscribed on the UNESCO representative list of intangible cultural heritage in 2018, acknowledging its global cultural significance.

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Which country was most recently added to the UNESCO list for its dry stone wall construction in 2024?

Answer: Ireland

Explanation: Ireland was the most recent addition to the UNESCO representative list for dry stone wall construction, inscribed in 2024.

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What is the term for professional builders of dry stone walls in Scotland?

Answer: Dykers

Explanation: In Scotland, professional craftsmen who build dry stone walls are specifically known as 'dykers'.

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In which areas of Britain and Ireland are dry stone walls particularly abundant?

Answer: Upland areas

Explanation: Dry stone walls are notably abundant in the upland areas of Britain and Ireland, particularly in regions like Connemara in the West of Ireland, where natural stone is readily available.

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What is one reason dry stone constructions are common in regions like The Burren?

Answer: Environmental conditions are too harsh for hedges to grow reliably.

Explanation: In regions such as The Burren, dry stone constructions are prevalent because the harsh environmental conditions preclude the reliable growth of hedges, making stone walls a necessary and durable solution for boundaries.

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Which of the following regions in the United States is *not* mentioned as having common dry stone walls?

Answer: The Pacific Northwest

Explanation: The provided information lists New England, New York, New Jersey, Pennsylvania, central Kentucky, the Ozarks, Virginia, and Napa Valley as regions in the United States with common dry stone walls, but does not mention the Pacific Northwest.

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Which immigrant groups primarily introduced dry stone construction techniques to America?

Answer: English and Scots-Irish

Explanation: Dry stone construction techniques were primarily introduced to America by English and Scots-Irish immigrants, who brought their traditional building methods.

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Besides Europe and North America, where else was the dry stone technique adopted, particularly in the Otago region?

Answer: New Zealand

Explanation: The dry stone technique was also adopted in New Zealand, particularly in the Otago region, as well as in parts of Australia.

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What is one of the practical reasons for building 'suhozidi' (dry stone walls) in Croatia?

Answer: To clear land of stones for agriculture

Explanation: In Croatia, 'suhozidi' were built for practical purposes such as clearing land of stones for agriculture, delineating land ownership, and providing shelter from the bora wind.

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Which Croatian island is noted for having 23 kilometers of dry stone walls across its small area?

Answer: Baljenac

Explanation: The Croatian island of Baljenac is particularly notable for its dense network of 23 kilometers of dry stone walls within its small 14-hectare area.

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In Scotland, small dry stone structures used as road and mountaintop markers are often called what?

Answer: Cairns

Explanation: Small dry stone structures used as markers, particularly in Scotland, are commonly referred to as cairns.

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Structural Components and Construction Methodologies

The style and method of dry stone wall construction are primarily influenced by global standardized building codes.

Answer: False

Explanation: The style and method of dry stone wall construction are primarily influenced by the type of stone available, the wall's intended use, and established local traditions, rather than global standardized building codes.

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Modern dry stone walls are almost exclusively constructed using field stones cleared from agricultural fields.

Answer: False

Explanation: While older dry stone walls often used field stones, modern dry stone walls are almost exclusively constructed using quarried stone, which provides more uniform material.

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In a 'double' dry stone wall, the voids between the outer facing stones are filled with concrete for added strength.

Answer: False

Explanation: In a 'double' dry stone wall, the voids between the outer facing stones are packed with smaller stones, known as 'filling' or 'hearting', not concrete.

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Tie-stones, or through stones, are used in double walls to bond the two outer faces together, increasing stability.

Answer: True

Explanation: Tie-stones, also known as through stones, are strategically placed in double walls to physically connect the two outer faces, thereby enhancing the overall structural integrity and stability.

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Increasing the width of a dry stone wall as it rises is a traditional practice that enhances its stability.

Answer: False

Explanation: Traditional practice dictates diminishing the width of a dry stone wall as it rises, creating a tapering design that enhances stability and reduces the likelihood of toppling.

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Capstones are the large stones forming the final layer on top of a dry stone wall, spanning its entire width to prevent breaking apart.

Answer: True

Explanation: Capstones, also known as coping stones, are indeed the large stones that form the uppermost layer of a dry stone wall, spanning its full width to provide structural cohesion and prevent the wall from separating.

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'Cripple Holes' are small gaps in dry stone walls, typically no more than 200 millimeters high, for the passage of small wildlife.

Answer: False

Explanation: Smaller gaps (up to 200mm) are called 'Bolt Holes' or 'Smoots'. 'Cripple Holes' are larger openings, typically 450 to 600 millimeters high, for the passage of wildlife or livestock.

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Boulder walls are a type of single dry stone wall primarily composed of large boulders, with smaller stones placed around them for stability.

Answer: True

Explanation: Boulder walls are indeed single dry stone walls characterized by their primary composition of large boulders, with smaller stones strategically placed to enhance stability.

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Galloway dykes are designed to be solid and impenetrable to deter livestock and people.

Answer: False

Explanation: Galloway dykes are uniquely designed to appear rickety and feature many holes, which paradoxically deters livestock and people, and also reduces wind force in high-wind areas.

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A Cornish hedge or Welsh clawdd is characterized by a stone-clad earth bank with a strict outward-curved 'batter'.

Answer: False

Explanation: A Cornish hedge or Welsh clawdd is characterized by a stone-clad earth bank with a strict *inward-curved* 'batter', not an outward-curved one.

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Traditional turf-roofed Highland blackhouses used a single-wall dry stone method for construction.

Answer: False

Explanation: Traditional turf-roofed Highland blackhouses were constructed using a double-wall dry stone method, with the interior filled with earth or sand for insulation.

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Dry stone retaining walls resist lateral earth pressure by using mortar to bond stones into a single unit.

Answer: False

Explanation: Dry stone retaining walls resist lateral earth pressure through the sheer weight of their stones and the friction between them, acting as a gravity wall without mortar.

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Historically, dry stone retaining walls were built extensively for agricultural terracing and to support infrastructure like roads.

Answer: True

Explanation: Dry stone retaining walls have a long history of extensive use in agricultural terracing and for supporting critical infrastructure such as paths, roads, and railways.

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What factors primarily influence the style and method of dry stone wall construction?

Answer: The type of stone available, intended use, and local traditions.

Explanation: The style and method of dry stone wall construction are highly localized, primarily influenced by the characteristics of the available stone, the functional purpose of the wall, and established regional building traditions.

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What is the primary source of stone for *modern* dry stone walls?

Answer: Quarried stone.

Explanation: While older dry stone walls often utilized field stones, modern dry stone walls predominantly use quarried stone due to its uniformity and availability.

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In a 'double' dry stone wall, what are the smaller stones packed into the voids between the outer facing stones called?

Answer: Hearting

Explanation: The smaller stones used to fill the voids between the outer faces of a double dry stone wall are known as 'filling' or 'hearting', contributing to the wall's mass and stability.

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What is the main purpose of 'tie-stones' or 'through stones' in a double dry stone wall?

Answer: To bond the two outer walls together for strength.

Explanation: Tie-stones, or through stones, are crucial for the structural integrity of double dry stone walls, as they physically connect and bond the two outer faces, preventing separation and enhancing stability.

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How does diminishing the width of a dry stone wall as it rises contribute to its strength?

Answer: It creates a more stable, gravity-fed structure less prone to toppling.

Explanation: The practice of tapering a dry stone wall, by diminishing its width as it rises, creates a more stable, gravity-fed structure that is inherently more resistant to toppling.

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What are the large stones forming the final layer on top of a dry stone wall, which span its entire width?

Answer: Capstones

Explanation: Capstones, also known as coping stones, are the large, spanning stones that form the uppermost layer of a dry stone wall, providing a protective and unifying finish.

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What are the larger openings in dry stone walls, ranging from 450 to 600 millimeters in height, used for the passage of wildlife or livestock?

Answer: Cripple Holes

Explanation: Cripple Holes are the larger, purposely built openings in dry stone walls, typically 450 to 600 millimeters high, designed to allow the passage of wildlife or livestock.

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Which characteristic best describes a boulder wall?

Answer: It is a single dry stone wall primarily composed of large boulders.

Explanation: A boulder wall is characterized as a single dry stone wall predominantly constructed from large boulders, with smaller stones used to fill gaps and enhance stability.

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What is a unique feature of Galloway dykes designed to deter livestock and people?

Answer: They appear rickety and have many holes.

Explanation: Galloway dykes are distinct for their deliberately rickety appearance and numerous holes, which serve as an effective deterrent to both livestock and people, while also mitigating wind pressure.

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A Cornish hedge or Welsh clawdd is characterized by a stone-clad earth bank with what type of 'batter'?

Answer: A strict inward-curved batter.

Explanation: A Cornish hedge or Welsh clawdd is defined by its stone-clad earth bank and a distinctive strict inward-curved 'batter' or slope.

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How were traditional turf-roofed Highland blackhouses constructed using dry stone methods?

Answer: Double-wall method with earth or sand filling for insulation.

Explanation: Traditional turf-roofed Highland blackhouses utilized a double-wall dry stone method, with the interstitial space filled with earth or sand to provide crucial insulation and eliminate drafts.

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How do dry stone retaining walls primarily resist lateral earth pressure?

Answer: Through the sheer weight of their stones and friction between them.

Explanation: Dry stone retaining walls function as gravity walls, resisting lateral earth pressure primarily through the substantial weight of their constituent stones and the inherent friction generated between them.

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What was a significant historical use for dry stone retaining walls?

Answer: Agricultural terracing and supporting infrastructure like roads.

Explanation: Historically, dry stone retaining walls were extensively utilized for creating agricultural terraces and providing stable support for vital infrastructure such as paths, roads, and railways.

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Contemporary Practice and Professional Standards

Correcting mistakes in dry stone walling often requires disassembling the wall down to the level of the error.

Answer: True

Explanation: Due to the interlocking nature of dry stone construction, correcting errors often necessitates dismantling the wall back to the point of the mistake, highlighting the skill required.

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Modern wire fencing has completely replaced dry stone walls due to its lower initial cost and quicker installation.

Answer: False

Explanation: Despite modern alternatives like wire fencing, dry stone walls are still valued for their landscape and heritage, sturdiness, and long, low-maintenance lifetimes, ensuring continued demand.

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The Dry Stone Walling Association in the UK offers a certification scheme with three grades for wallers.

Answer: False

Explanation: The Dry Stone Walling Association in the UK offers a nationally recognized certification scheme for wallers that includes four grades, not three.

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Why is considerable skill required for dry stone walling, particularly when mistakes occur?

Answer: Correcting mistakes often requires disassembling the wall down to the error level.

Explanation: The intricate interlocking nature of dry stone construction means that rectifying errors frequently necessitates dismantling the wall to the point of the mistake, underscoring the high level of skill and precision required.

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Despite modern alternatives, why are dry stone walls still appreciated and in demand?

Answer: They are valued for their landscape and heritage, sturdiness, and low-maintenance lifetimes.

Explanation: Dry stone walls continue to be valued for their enduring aesthetic, historical significance, inherent robustness, and minimal maintenance requirements over their long lifespan, despite the availability of cheaper, quicker modern fencing solutions.

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How many grades are included in the UK Dry Stone Walling Association's nationally recognized certification scheme for wallers?

Answer: Four

Explanation: The UK Dry Stone Walling Association's certification scheme for wallers comprises four distinct grades, from Initial to Master Craftsman, recognizing varying levels of expertise.

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Illustrative Case Studies and Architectural Forms

The image of 'Dry stone walls in the Yorkshire Dales, England' illustrates a modern artistic application of dry stone construction.

Answer: False

Explanation: The image of 'Dry stone walls in the Yorkshire Dales, England' illustrates a common application of dry stone construction in agricultural landscapes, not a modern artistic application.

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The image of 'Intihuatana ritual buildings of dry stone at Machu Picchu, Peru' shows structures built with the rustic interlocking of unshaped stones.

Answer: False

Explanation: The Intihuatana ritual buildings at Machu Picchu exemplify the precise dry stone techniques characteristic of Inca architecture, which involved highly refined stone cutting and fitting, not rustic interlocking of unshaped stones.

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The image of 'Galloway dyke on Fetlar, Shetland Islands, UK' showcases a solid, wind-resistant dry stone wall.

Answer: False

Explanation: Galloway dykes are specifically designed to be porous with many holes, which reduces wind force and prevents them from being unsettled, rather than being solid and impenetrable.

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The Gearrannan Blackhouse Village in Scotland features traditional blackhouses built using a single-wall dry stone method.

Answer: False

Explanation: The traditional blackhouses in Gearrannan Blackhouse Village were constructed using a double-wall dry stone method, with earth or sand filling for insulation.

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The image of 'A stone terrace created using dry stack techniques in North Carolina' illustrates the use of dry stone methods for landscaping and retaining earth on slopes.

Answer: True

Explanation: The image of a stone terrace in North Carolina explicitly demonstrates the application of dry stack techniques for landscaping and effectively retaining earth on sloped terrain.

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The image of 'Dry stone walls in the Yorkshire Dales, England' primarily illustrates what aspect of dry stone construction?

Answer: Its application in agricultural landscapes.

Explanation: The image of dry stone walls in the Yorkshire Dales exemplifies the widespread and traditional use of this construction method within agricultural landscapes.

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What does the image of 'Intihuatana ritual buildings of dry stone at Machu Picchu, Peru' highlight about Inca dry stone architecture?

Answer: Its precise dry stone techniques.

Explanation: The Intihuatana ritual buildings at Machu Picchu serve as a prime example of the highly precise dry stone techniques employed in Inca architecture, characterized by meticulously fitted stones without mortar.

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The image of 'Galloway dyke on Fetlar, Shetland Islands, UK' demonstrates a type of dry stone wall specifically designed for what environmental condition?

Answer: High winds

Explanation: Galloway dykes, as depicted in the image, are a specialized form of dry stone wall engineered to withstand and mitigate the force of exceptionally high winds through their porous construction.

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The Gearrannan Blackhouse Village in Scotland features traditional blackhouses built with what specific dry stone method?

Answer: Double-wall dry stone method.

Explanation: The traditional blackhouses at Gearrannan Blackhouse Village in Scotland were constructed using a double-wall dry stone method, incorporating earth or sand for insulation.

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What does the image of 'A stone terrace created using dry stack techniques in North Carolina' exemplify?

Answer: The application of dry stone methods for landscaping and retaining earth.

Explanation: The image of a stone terrace in North Carolina serves as an example of how dry stack techniques are effectively applied in modern landscaping for both aesthetic purposes and the practical function of retaining earth on slopes.

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