Some of these faults may have allowed ignimbrites to erupt from the surface, and so there may be some association between the two, also some small alkali basalts from the Miocene occur along with basin and range style faulting.
Some of these faults may have allowed ignimbrites to erupt from the surface, and so there may be some association between the ignimbrite occurrence and faults; this can be used to find out information about different kinds of basement rock present. Also some small alkali basalts from the Miocene occur along with basin and range style faulting.