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See also Line (geometry). A lineament is a linear feature in a landscape which is an expression of an underlying geological structure such as a fault.Typically a lineament will appear as a fault-aligned valley, a series of fault or fold-aligned hills, a straight coastline or indeed a combination of these features.
The Gonâve microplate, showing the fault zones that bound it. The Gonâve microplate forms part of the boundary between the North American plate and the Caribbean plate.It is bounded to the west by the Mid-Cayman Rise spreading center, to the north by the Septentrional-Oriente fault zone and to the south by the Walton fault zone and the Enriquillo–Plantain Garden fault zone.
At the triple junction each of the three boundaries will be one of three types – a ridge (R), trench (T) or transform fault (F) – and triple junctions can be described according to the types of plate margin that meet at them (e.g. fault–fault–trench, ridge–ridge–ridge, or abbreviated F-F-T, R-R-R).
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.
Fracture zones and the transform faults that form them are separate but related features. Transform faults are plate boundaries, meaning that on either side of the fault is a different plate. In contrast, outside of the ridge-ridge transform fault, the crust on both sides belongs to the same plate, and there is no relative motion along the ...
The Bangui magnetic anomaly in central Africa and the Kursk magnetic anomaly in eastern Europe (both in red) In geophysics, a magnetic anomaly is a local variation in the Earth's magnetic field resulting from variations in the chemistry or magnetism of the rocks. Mapping of variation over an area is valuable in detecting structures obscured by ...
The New York–Alabama Lineament is a magnetic anomaly in the geology of eastern North America running from Alabama to New York. The lineament is defined by discontinuities in aeromagnetic measurements indicating an approximately 220-kilometre (140 mi) displacement of buried geologic structures along this line.
In some usages, the name Owen Transform Fault is used to denote the short section between the end of the Aden-Sheba ridge and the Carlsberg Ridge. [3] Additionally, this area has been called the Aden–Owen–Carlsberg triple junction , although the Carlsberg Ridge is offset 330 km (210 mi) from the point where the Owen fracture zone/fault ...