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The Gonâve Microplate, showing location of the main fault zones. The Septentrional-Orient fault zone (SOFZ) is a system of active coaxial left lateral-moving strike slip faults that runs along the northern side of the island of Hispaniola where Haiti and the Dominican Republic are located and continues along the south of Cuba along the northern margin of the Cayman Trough.
The EPGFZ shares approximately half of the relative motion between the North American and Caribbean tectonic plates with the Septentrional-Oriente fault zone which runs along the northern side of Hispaniola. Both faults merge into the Cayman Trench to the west. The fault accommodates about 20.6±1.66 millimeters of lateral motion per year (mm ...
The Septentrional-Oriente fault zone passes through the Windward Passage from the southern coast of Cuba to the northern coast of Hispaniola. During the Holocene the slip rate between these two islands was 9 ± 3 mm (0.35 ± 0.12 in)/year.
To the south is the Enriquillo–Plantain Garden fault zone, which extends from Jamaica in the west to the south-east of Hispaniola to the east. In the north the fault zone is the Septentrional-Oriente fault zone passing along the southern margin of Cuba and along the northern part of Hispaniola. Both of these fault zones have been associated ...
The strike-slip fault system in the region has two branches in Haiti, the Septentrional-Oriente fault in the north and the Enriquillo-Plantain Garden fault in the south; both its location and focal mechanism suggested that the January 2010 quake was caused by a rupture of the Enriquillo-Plantain Garden fault, which had been locked for 250 years ...
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.
The U.S.Virgin Islands are part of the Greater Antilles that lies parallel to the Puerto Rico Trench; an oblique subduction zone where the North American Plate is underthrusted beneath the Caribbean Plate along the Lesser Antilles subduction zone transits to strike-slip along the Septentrional-Oriente fault zone.
The Beebe vent field is in the Caribbean Sea, at the northern end of the Mid-Cayman Rise on the segments closest to the Septentrional-Oriente fault zone. [1] [12] The Beebe vent field consists of seven sulfide mounds on the western side of the spreading center, the majority of which are inactive. [13]