Thrust (reverse) faults, Ketobe Knob, northern San Rafael Swell, Utah
Reverse faults shorten horizontal layers and are therefore contractional faults. This is an example of a reverse fault in fine-grained sandstones and siltstones of the Entrada Sandstone (lower reddish part) and Curtis Formation (upper part) – part of the Jurassic stratigraphy of the Colorado Plateau.
Reverse faults (and any other type of fault for that matter) may look nice and clean on drawn-up cross-sections or seismic images, but in detail they tend to be more complicated. In this case it is being composed of several strands and numerous small-scale deformation structures. Hence at this scale the structure is better termed a fault zone than a single fault
#GeologyHelp #Environment #Area
#Structural #Geology #faults #reverse #Thrust #deformation #seismic
#stratigraphy #Jurassic #small_scale
#siltstones #Sandstone
