People | George
Davis
Fault-Fin Landscape
The expression ‘fault-fin landscape’ is proposed
for topography marked by a set of blade-like fins and walls of rock,
controlled by deformation band shear zones, which project metres above
upland surfaces of porous sandstone. Dramatic examples occur
along monoclines of Navajo Sandstone in the Colorado Plateau region
of southern Utah, USA. The fins express differential rates of
erosion of porous (20-25%) host sandstone relative to deformation band
shear zones (≤1% to 5% porosity), which are made highly resistant
by collapse of porosity, cataclasis of quartz grains, and silica precipitation.
[Davis, G.H., 1998, Fault-fin landscape: Geological
Magazine, v. 135 (2), p. 283-286.]
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