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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.
San Andreas Fault System (Banning fault, Mission Creek fault, South Pass fault, San Jacinto fault, Elsinore fault) 1300: California, United States: Dextral strike-slip: Active: 1906 San Francisco (M7.7 to 8.25), 1989 Loma Prieta (M6.9) San Ramón Fault: Chile: Thrust fault: Sawtooth Fault: Idaho, United States: Normal fault: Seattle Fault ...
The farthest west into South Dakota is 99°W, [1] which is about 55 km (34 mi) from the Minnesota – South Dakota border. This crustal boundary is the Great Lakes tectonic zone (GLTZ). This crustal boundary is the Great Lakes tectonic zone (GLTZ).
See the main article on faults for a fuller treatment of fault types and nomenclature but in brief, the main types are normal faults, reverse faults, thrusts or thrust faults and strike-slip faults. Many faults may have acted as both normal faults at one time and as reverse or thrust faults at another and may or may not have also incorporated ...
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.
Globally most fault zones are located on divergent plate boundaries on oceanic crust. This means that they are located around mid-ocean ridges and trend perpendicular to them. The term fracture zone is used almost exclusively for features on oceanic crust; similar structures on continental crust are instead termed transform or strike slip faults.
Excerpt from main map showing the putative Hood Canal Fault (dashed line) running up Hood Canal and Dabob Bay, the Dabob Bay Fault Zone (DBFZ), Saddle Mountain faults (SM), and western end of the Seattle Fault zone (approximate). Hood Canal marks an abrupt change of physiography between the Puget Lowland and the Olympic Mountains to the west.
Dip is defined as the angle of the fault relative to the surface of the earth, which indicates the plane on which slip will occur. Lastly, in any non-vertical fault, the block above the fault is called the hanging wall, while the block below the fault is called the footwall. [4] Normal and reverse dip-slip faults with labeled hanging wall and ...
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