The Mason-Dixon Line (or Mason and Dixon's Line) was surveyed between 1763 and 1767 by Charles Mason and Jeremiah Dixon to resolve disputes over the borders between the colonies of Pennsylvania, Maryland, Delaware and Virginia (in the area now Known as the state of West Virginia. The line demarcates the vertical border between Maryland and Delaware, and horizontally the border between Pennsylvania and Maryland, West Virginia. The line surveyed actually comprises a small portion of the border between W.Virginia and Pennsylvania.
This line has been later referred to as the line that separates free states from slave states.
The boundary between two materials is called an interface.
The boundary between the troposphere and the stratosphere is called the tropopause.
Such a boundary is called a front.
The boundary of mantle and core are called Gutenberg Discontinuity
Four U.S. states call themselves commonwealth: Kentucky, Massachusetts, Pennsylvania, and Virginia.
A boundary where the plates are moving apart is called a divergent boundary. It is also called a constructive boundary because new crust is made there.
A front
No, it happened to follow the border of Maryland and Pennsylvania, and divided slave country from free soil.And it wasn't the origin of 'Dixie', which was named after the widely-distributed ten-franc coin ('DIX') from when Louisiana was French.NEW ANSWER:The Mason and Dixon Line is usually thought of as the line that divides the North and South. Actually it is the east-west boundary line that separates Pennsylvania from Maryland and part of West Virginia, and the north-south boundary between Maryland and Delaware. Before the Civil War, the southern boundary of Pennsylvania was considered the dividing line between the slave and non-slave states.In the 1700's a boundary quarrel arose between Pennsylvania and Maryland. The two agreed to settle the dispute by having the land surveyed. In 1763, they called in two English astronomers, Charles Mason and Jeremiah Dixon. They completed the survey in 1767. The line was named after them.The surveyors set up milestones to mark the boundary. Through the years souvenir hunters removed many of the stones and used them as doorsteps and curbstones. Authorities finally recovered many of them, however, and nearly replaced all of the stolen markers.
It is called a fault
They are called the cardinal points. To the south is Virginia and north Pennsylvania and to the east Delaware to the west is West Virginia
A front
The boarder between two plates is called a boundary.