41. There are four major fracture zones in the basin and magnetic lineations have been detected in the basin. 42. The top 50 meters of the glacier form the fracture zone , where ice moves as a single unit. 43. The Variscan fracture zones were active during the entire Upper Cretaceous and decisively influenced the sedimentary facies distributions. 44. The Blanco Fracture Zone is a fracture zone running between the Juan de Fuca Ridge and the Gorda Ridge. 45. The Blanco Fracture Zone is a fracture zone running between the Juan de Fuca Ridge and the Gorda Ridge. 46. Cracks form as the glacier moves over irregular terrain, which may penetrate the full depth of the fracture zone . 47. Current research indicates that the ridge was formed as a fracture zone and transform fault along the East Pacific Rise. 48. The event occurred near the Cuba Fracture Zone and was well away from the edge of the North American Plate. 49. The rift may be intersected by a shear or fracture zone , which act as locked zones and prevent further propagation. 50. For both Tonga and Bolivia, the calculated fracture zone is far too big for the wedge cracking of the phase-transition theory.
