The Mason–Dixon Line (or "Mason and Dixon's Line") is a demarcation line between four U.S. states, forming part of the borders of Pennsylvania, Maryland, Delaware, and West Virginia (then part of Virginia). A demarcation line means simply a boundary around a specific area but is commonly used to denote a temporary geopolitical Border, often agreed upon as part of an Armistice A US state is any one of the fifty subnational entities of the United States of America that share Sovereignty with the federal government The Commonwealth of Pennsylvania ( often colloquially referred to as PA (its abbreviation by natives and Northeasterners is a state located in the Northeastern Delaware ( is a state located on the Atlantic Coast in the Mid-Atlantic region of the United States. West Virginia ( is a state in the Appalachian Upland South, and Mid-Atlantic regions of the United States, bordered by The Commonwealth of Virginia ( is an American state It was surveyed between 1763 and 1767 by Charles Mason and Jeremiah Dixon in the resolution of a border dispute between British colonies in Colonial America. Charles Mason ( Oakridge Lynch Gloucestershire, April 1728&ndash Philadelphia, October 25, 1786) was an English Astronomer Jeremiah Dixon ( Cockfield County Durham July 27 1733 &ndash Cockfield County Durham January 22 1779) was an English The British Empire was the largest empire in history and for over a century was the foremost global power. The term colonial history of the United States refers to the history of the land that would become the United States from the start of European settlement to the time of independence Popular speech, especially since the Missouri compromise of 1820 (apparently the first official usage of the term "Mason's and Dixon's Line"), uses the Mason-Dixon Line symbolically as a cultural boundary between the Northern United States and the Southern United States (Dixie). The Missouri Compromise was an agreement passed in 1820 between the pro-slavery and anti-slavery factions in the United States Congress, involving The Northern United States is a large geographic region of the United States of America. The Southern United States &mdashcommonly referred to as the American South, Dixie, or simply the South &mdashconstitutes a large distinctive Dixie is a nickname for the Southern United States. Origin of Dixie According to the Oxford English Dictionary, the origins
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Maryland and Pennsylvania both claimed the land between the 39th and 40th parallels according to the charters granted to each colony. The 'Three Lower Counties' (Delaware) along Delaware Bay moved into the Penn sphere of settlement, and later became the Delaware Colony, a satellite of Pennsylvania. Delaware Bay is a large Estuary outlet of the Delaware River on the Northeast seaboard of the United States whose fresh water mixes for many miles Delaware Colony was an English Colony in North America. Settlement From the early Dutch settlement in 1631 to the colony’s
In 1732 the proprietary governor of Maryland, Charles Calvert, 5th Baron Baltimore, signed an agreement with William Penn's sons which drew a line somewhere in between, and also renounced the Calvert claim to Delaware. Charles Calvert 5th Baron Baltimore, FRS ( September 29 1699 – April 24 1751) was a British noble William Penn ( October 14, 1644 – July 30, 1718) was founder and "Absolute Proprietor" of the Province of Pennsylvania, But later Lord Baltimore claimed that the document he signed did not contain the terms he had agreed to, and refused to put the agreement into effect. Beginning in the mid-1730s, violence erupted between settlers claiming various loyalties to Maryland and Pennsylvania. The border conflict between Pennsylvania and Maryland would be known as Cresap's War. For the 1774 conflict also known as "Cresap's War" see Dunmore's War.
The issue was unresolved until the Crown intervened in 1760, ordering Frederick Calvert, 6th Baron Baltimore to accept the 1732 agreement. Frederick Calvert 6th Baron Baltimore ( February 6 1731 – September 4 1771) was an English nobleman and last in the line of Barons As part of the settlement, the Penns and Calverts commissioned the English team of Charles Mason and Jeremiah Dixon to survey the newly established boundaries between the Province of Pennsylvania, the Province of Maryland, Delaware Colony and parts of Colony and Old Dominion of Virginia. Charles Mason ( Oakridge Lynch Gloucestershire, April 1728&ndash Philadelphia, October 25, 1786) was an English Astronomer Jeremiah Dixon ( Cockfield County Durham July 27 1733 &ndash Cockfield County Durham January 22 1779) was an English Surveying is the technique and science of accurately determining the terrestrial or three-dimensional space Position of points and the distances and angles between The Province of Pennsylvania, also known as Pennsylvania Colony, was a North American colony granted to William Penn on March 4, 1681 The Province of Maryland was an English colony in North America that existed from 1632 until 1776 when it joined the other twelve of the Thirteen colonies Delaware Colony was an English Colony in North America. Settlement From the early Dutch settlement in 1631 to the colony’s The Colony of Virginia (also known frequently as the Virginia Colony and occasionally as the Dominion and Colony of Virginia) was the English colony
After Pennsylvania abolished slavery in 1781, the western part of this line and the Ohio River became a border between free and slave states, although Delaware remained a slave state. The Ohio River is the largest Tributary by volume of the Mississippi River.
Mason and Dixon's actual survey line began to the south of Philadelphia, Pennsylvania, and extended from a benchmark east to the Delaware River and west to what was then the boundary with western Virginia. Philadelphia (ˌfɪləˈdɛlfiə This article is about the use of bench marks in surveying for other uses see Bench mark. The Delaware River is a river on the Atlantic coast of the United States.
The surveyors also fixed the boundary between Delaware and Pennsylvania and the approximately north–south portion of the boundary between Delaware and Maryland. Delaware ( is a state located on the Atlantic Coast in the Mid-Atlantic region of the United States. The Commonwealth of Pennsylvania ( often colloquially referred to as PA (its abbreviation by natives and Northeasterners is a state located in the Northeastern Delaware ( is a state located on the Atlantic Coast in the Mid-Atlantic region of the United States. Most of the Delaware–Pennsylvania boundary is a circular arc, and the Delaware–Maryland boundary does not run truly north-south because it was intended to bisect the Delmarva Peninsula rather than follow a meridian. The Twelve-Mile Circle is an arc that makes up most of the boundary between the Commonwealth of Pennsylvania and the State of Delaware in the United States The Delmarva Peninsula is a large Peninsula on the East Coast of the United States, occupied by portions of three U
The Maryland–Pennsylvania boundary is an east-west line with an approximate mean latitude of 39° 43' 20" N (Datum WGS 84). This article describes a concept from Surveying and Geodesy. For other meanings see Datum (disambiguation. The World Geodetic System defines a reference frame for the earth for use in Geodesy and Navigation. In reality, the east-west Mason-Dixon line is not a true line in the geometric sense, but is instead a series of many adjoining lines, following a path between latitude 39° 43' 15" N and 39° 43' 23" N; a surveyor or mapper might call it an approximate rhumb line. See also Great circle Small circle As such, the line approximates a segment of a small circle upon the surface of the (also approximately) spherical Earth. A small circle of a Sphere is the circle constructed by a plane crossing the sphere not in its center The geoid is that Equipotential surface which would coincide exactly with the mean ocean surface of the Earth if the oceans were in equilibrium at rest and extended through An observer standing on such a line and viewing its path toward an unobstructed horizon, would perceive it to bend away from his line of sight, an effect of the inequality between the amount of curvature to his left and right. Among parallels of latitude, only the Equator is a great circle and would not exhibit this effect. The equator (sometimes referred to colloquially as "the Line") is the intersection of the Earth 's surface with the plane perpendicular to the A great circle is a Circle on the surface of a Sphere that has the same circumference as the sphere dividing the sphere into two equal Hemispheres.
The surveyors also extended the boundary line to run between Pennsylvania and colonial western Virginia, (which became West Virginia during the American Civil War, on June 20, 1863), though this was contrary to their original charter; this extension of the line was only confirmed later (see Yohogania County for details). Yohogania County was created by the new state of Virginia in 1776, in an area long disputed between Virginia and Pennsylvania.
The Mason–Dixon Line was marked by stones every mile and ”crownstones” every five miles, using stone shipped from England. The Maryland side says (M) and the Delaware and Pennsylvania sides say (P). Crownstones include the two coats-of-arms. Today, while a number of the original stones are missing or buried, many are still visible, resting on public land and protected by iron cages.
Mason and Dixon confirmed earlier survey work which delineated Delaware's southern boundary from the Atlantic Ocean to the ”Middle Point” stone (along what is today known as the Transpeninsular Line). The Transpeninsular Line (at approximately 38° 27' N is a surveyed line the eastern half of which forms the north-south border between Delaware and Maryland. They proceeded nearly due north from this to the Pennsylvania border.
Later the line was marked in places by additional benchmarks and survey markers. The lines have been resurveyed several times over the centuries without substantive changes to Mason and Dixon's work. The stones may be a few to a few hundred feet east or west of the point Mason and Dixon thought they were; in any event, the line drawn from stone to stone forms the legal boundary.
According to Dave Doyle at the National Geodetic Survey, part of the National Oceanic and Atmospheric Administration, the common corner of Pennsylvania, Maryland, and Delaware, at The Wedge is marked by Boundary Monument #87. The National Geodetic Survey and the Office of Coast Survey are the two successor agencies in the United States to the U The National Oceanic and Atmospheric Administration ( NOAA) is a scientific agency within the United States Department of Commerce focused on the conditions of the The Wedge (or Delaware Wedge) is a small tract of land along the border between Delaware, Maryland, and Pennsylvania. The marker ”MDP Corner” dates from 1935 and is offset on purpose.
Doyle said the Maryland–Pennsylvania Mason–Dixon Line is exactly:
and Boundary Monument #87 is on that parallel, at:
Visitors to the tripoint are strongly encouraged to first obtain permission from the nearest landowner.
The line was established to end a boundary dispute between the British colonies of Maryland and Pennsylvania/Delaware. Due to incorrect maps and confusing legal descriptions, the royal charters of the three colonies overlapped. Maryland was granted the territory north of the Potomac River/Watkins Point up to the fortieth parallel; Pennsylvania was granted land extending northward from a point "12 miles north of New Castle Towne," which is located south of the fortieth parallel. The Potomac River flows into the Chesapeake Bay, located along the mid- Atlantic coast of the United States. New Castle is a city in New Castle County, Delaware, six miles (10 km south of Wilmington, situated on the Delaware River, at the head The most serious problem was that the Maryland claim would put Philadelphia, which became the major city in Pennsylvania, within Maryland. Philadelphia (ˌfɪləˈdɛlfiə A protracted legal dispute between the Calvert family, which controlled Maryland, and the Penn family, which controlled Pennsylvania and the "Three Lower Counties" (Delaware), was ended by the 1750 ruling that the boundary should be fixed as follows:
The disputants engaged an expert British team, astronomer Charles Mason and surveyor Jeremiah Dixon, to survey what became known as the Mason–Dixon Line. Charles Mason ( Oakridge Lynch Gloucestershire, April 1728&ndash Philadelphia, October 25, 1786) was an English Astronomer Jeremiah Dixon ( Cockfield County Durham July 27 1733 &ndash Cockfield County Durham January 22 1779) was an English
The Mason–Dixon line is made up of four segments corresponding to the terms of the settlement: Tangent Line, North Line, Arc Line, and 39° 43' N parallel. The most difficult task was fixing the Tangent Line, as they had to confirm the accuracy of the Transpeninsular Line mid-point and the Twelve-Mile Circle, determine the tangent point along the circle, then actually survey and monument the border. They then surveyed the North and Arc Lines. They did this work between 1763 and 1767. This actually left a small wedge of land in dispute between Delaware and Pennsylvania until 1921. The Wedge (or Delaware Wedge) is a small tract of land along the border between Delaware, Maryland, and Pennsylvania.
In April 1765 Mason and Dixon began their survey of the more famous Maryland-Pennsylvania line. They were commissioned to run it for a distance of five degrees of longitude west from the Delaware River, fixing the western boundary of Pennsylvania (see the entry for Yohogania County). Yohogania County was created by the new state of Virginia in 1776, in an area long disputed between Virginia and Pennsylvania. However, in October 1767 at Dunkard Creek near Mount Morris, Pennsylvania, nearly 244 miles (392 km) west of the Delaware, a group of Native Americans forced them to quit their progress. Dunkard Creek is a stream that flows through Greene County Pennsylvania and Monongalia County West Virginia near the towns of Mount Morris Pennsylvania and Native Americans in the United States are the indigenous peoples from the regions of North America now encompassed by the continental United States In 1784, surveyors David Rittenhouse and Andrew Ellicott and their crew completed the survey of the Mason-Dixon line to the southwest corner of Pennsylvania, five degrees from the Delaware River. David Rittenhouse ( April 8, 1732 June 26, 1796) was a renowned American Astronomer, Inventor, Clockmaker Andrew Ellicott ( January 24, 1754 &ndash August 28, 1820) was a U Other surveyors continued west to the Ohio River. The Ohio River is the largest Tributary by volume of the Mississippi River. The section of the line between the southwestern corner of Pennsylvania and the river is the county line between Marshall and Wetzel counties, West Virginia. Marshall County is a County located in the US state of West Virginia. Wetzel County is a County located in the US state of West Virginia.
The boundary between Pennsylvania and Maryland was resurveyed in 1849, then again in 1900.
The Missouri Compromise of 1820 created the political conditions which made the Mason-Dixon Line important to the history of slavery. The Missouri Compromise was an agreement passed in 1820 between the pro-slavery and anti-slavery factions in the United States Congress, involving Slavery in the United States began soon after English colonists first settled Virginia in 1607 and lasted until the passage of the Thirteenth It was during the Congressional debates leading up to the compromise that the term "Mason-Dixon line" was first used to designate the entire boundary between free states and slave states.
On November 14, 1963, during the bicentennial of the Mason–Dixon Line, U. Events 1533 - Conquistadors from Spain under the leadership of Francisco Pizarro arrive in Cajamarca, Inca Year 1963 ( MCMLXIII) was a Common year starting on Tuesday (link will display full calendar of the Gregorian calendar. S. President John F. Kennedy opened a newly completed section of Interstate 95 where it crossed the Maryland-Delaware border. John Fitzgerald "Jack" Kennedy (May 29 1917&ndashNovember 22 1963 often referred to by his initials JFK, was the thirty-fifth President of Interstate 95 ( I-95) is the main Highway on the East Coast of the United States, paralleling the Atlantic Ocean from Maine to It was his last public appearance before the one 8 days later in Dallas, Texas, where he was assassinated. The assassination of John F Kennedy, the thirty-fifth President of the United States, took place on Friday November 22 1963 in Dallas Texas The Delaware Turnpike and the Maryland portion of the new road were each later designated as the John F. Kennedy Memorial Highway. This article describes a portion of Interstate 95 in Maryland.
The states in dark red are almost always included in modern day definitions of the South, while those in medium red are usually included. The striped states are sometimes/occasionally considered Southern. Note that the Mason-Dixon line forms part of the northern boundary of the striped states[1]
The Mason-Dixon line became symbolic of the division between the "free states" and "slave states" from the Missouri Compromise until the end of the American Civil War. The Missouri Compromise was an agreement passed in 1820 between the pro-slavery and anti-slavery factions in the United States Congress, involving Causes of the war See also Origins of the American Civil War, Timeline of events leading to the American Civil War The coexistence of a slave-owning South Pennsylvania abolished slavery before the end of the American Revolution while Maryland, Delaware, Kentucky, and Missouri remained slave states until the end of the war. The Commonwealth of Pennsylvania ( often colloquially referred to as PA (its abbreviation by natives and Northeasterners is a state located in the Northeastern In this article the inhabitants of the thirteen colonies that supported the American Revolution are primarily referred to as "Americans" with occasional references to "Patriots" Delaware ( is a state located on the Atlantic Coast in the Mid-Atlantic region of the United States. The Commonwealth of Kentucky ( is a state located in the East Central United States of America. Missouri ( or) is a state in the Midwestern region of the United States bordered by Iowa, Illinois, Kentucky, Tennessee A slave state was a US state in which Slavery of African Americans was legal
After the Civil War, the line continued to be considered a cultural boundary. Some have imagined it continuing westward from Pennsylvania down the Ohio River to the Mississippi River, and crossing the Mississippi to place Arkansas, Louisiana and Texas south of the line. The Ohio River is the largest Tributary by volume of the Mississippi River. The Mississippi River is the second longest River in the United States, with a length of from its source in Lake Itasca in Minnesota to Arkansas ( is a state located in the southern region of the United States. The State of Louisiana ( or, État de Louisiane, pronounced) is a state located in the southern region of the United States of America Texas ( is a state geographically located in the South Central United States and is also known as the Lone Star State. Debate whether border states such as Missouri, Kentucky, Maryland and West Virginia belong on the north or south side of this boundary line continues to this day. Missouri ( or) is a state in the Midwestern region of the United States bordered by Iowa, Illinois, Kentucky, Tennessee The Commonwealth of Kentucky ( is a state located in the East Central United States of America. West Virginia ( is a state in the Appalachian Upland South, and Mid-Atlantic regions of the United States, bordered by