<P> The Blanco Fracture Zone is a fracture zone running between the Juan de Fuca Ridge and the Gorda Ridge . The dominating feature of the fracture zone is the 150 km long Blanco Ridge, which is a high - angle, right - lateral strike slip fault with some component of dip - slip faulting . </P> <P> The Charlie - Gibbs Fracture Zone consists of two fracture zones in the North Atlantic that extend for over 2000 km . These fracture zones displace the Mid-Atlantic Ridge a total of 350 km to the west . The section of the Mid-Atlantic Ridge between the two fracture zones is seismically active . </P> <P> The Mendocino Fracture Zone extends for over 4,000 km off the coast of California and separates the Pacific Plate and Gorda Plate . The bathymetric depths on the north side of the fracture zone are 800 to 1,200 m shallower than to the south, suggesting the seafloor north of the ridge to be younger . Geologic evidence backs this up, as rocks were found to be 23 to 27 million years younger north of the ridge than to the south . </P> <P> Also known as the Romanche Trench, this fracture zone separates the North Atlantic and South Atlantic Oceans . The trench reaches 7,758 m deep, is 300 km long, and has a width of 19 km . The fracture zone offsets the Mid-Atlantic Ridge by more than 640 km . </P>

New crust is formed via seafloor spreading along fracture zones