Please enable JavaScript.
Coggle requires JavaScript to display documents.
Rock Deformation - Coggle Diagram
Rock Deformation
Types of pressure & stress
lithostatic
weight of rock acting according to gravity
tectonic
plate tectonic movement moving converging laterally
Tensional
stresses are divergent
constructive boundaries
Compressional
destructive boundaries
stress is convergent
features associated with fault planes
slickenslides
scratches found on fault planes
left by the grinding of the fault plane as the fault moves
smooth in direction of fault and rough in opposite direction
fault breccia
consists of fragments broken from the rocks on either side of the fault plane, fragments are large and angular and made of hard competent rock. may be cemented by minerals precipitated in the fault zone at a later stage
Fault gouge
in some faults such as thrust faults, the grinding of rock along the fault plane can be extreme, producing a fault gouge consisting of very fine particles of rock. They have formed with high pressure and the particles can be fused together along the fault itself to form mylonite