21. A downthrown block between two normal faults dipping towards each other is called a graben. 22. The normal faults have large offsets and transect the volcano into at least four sectors. 23. The alarm would be handled by the normal fault management process ( see above ). 24. Intrabasin transfer zones could be relay ramps within en echelon normal faults , or minor fault jogs. 25. Low angle normal faults have been proposed to be a key structural feature for crustal extension. 26. In places, the grabens appear to crosscut the normal faults , indicating that the grabens are younger. 27. At the western end, the base has dropped down along normal faults , forming a graben structure. 28. The Greenside fault is a normal fault with an average dip of 70?to the east. 29. Numerous low-angle normal faults formed during this time. 30. However, some scientist do not believe that low angle normal faults exist actively in the world.
