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.
Lineaments are often apparent in geological or topographic maps and can appear obvious on aerial or satellite photographs.
In Scotland the Great Glen Fault and Highland Boundary Fault give rise to lineaments as does the Malvern Line in western England and the Neath Disturbance in South Wales.
[1] The Trans Brazilian Lineament and the Trans-Saharan Belt, taken together, form perhaps the longest coherent shear zone on the Earth, extending for about 4,000 km.