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The distinction between avulsion and accretion becomes important if a river forms the boundary between two riparian owners. In many jurisdictions, if the river changes channels by avulsion, the boundary does not change but remains in the middle of the old channel.
An example of a minor avulsion is known as a meander cutoff, when a pronounced meander (hook) in a river is breached by a flow that connects the two closest parts of the hook to form a new channel. This occurs when the ratio between the channel slope and the potential slope after an avulsion is less than about 1/5. [1]
Accession has different definitions depending upon its application. Accession in property law is a mode of acquiring property that involves the addition of value to the property through labour or the addition of new materials. For example, a person who owns a property on a river delta also takes ownership of any additional land that builds up ...
An avulsion fracture is a bone fracture which occurs when a fragment of bone tears away from the main mass of bone as a result of physical trauma. This can occur at the ligament by the application of forces external to the body (such as a fall or pull) or at the tendon by a muscular contraction that is stronger than the forces holding the bone ...
In geology, accretion is a process by which material is added to a tectonic plate at a subduction zone, frequently on the edge of existing continental landmasses. The added material may be sediment, volcanic arcs , seamounts , oceanic crust or other igneous features.
Avulsion in general refers to a tearing away. Specifically, it can refer to: Avulsion fracture, when a fragment of bone tears away from the main mass of bone as a result of physical trauma; Avulsion injury, in which a body structure is detached from its normal point of insertion, either torn away by trauma or cut by surgery
In real estate law, reliction is the gradual recession of water from its usual high-water mark so that the newly uncovered land becomes the property of the adjoining riparian property owner. [ 3 ] "Relict" was an ancient term still used in colonial (British) America, and in England and Ireland of that era, now archaic, for a widow ; it has come ...
A fault plane is the plane that represents the fracture surface of a fault. A fault trace or fault line is a place where the fault can be seen or mapped on the surface. A fault trace is also the line commonly plotted on geologic maps to represent a fault. [3] [4] A fault zone is a cluster of parallel faults.