Description
The collapse and downhill displacement of competent strata. It is particularly prevalent where strong rocks overlie weaker mud-rich and clay-rich rocks.
Usually attributed to stress relief under periglacial conditions, caused by erosion of material along valley floors and frost-induced heave.
Category
Category of FEP
Geosynthesis
Sub-category
Sub-category of FEP
Internal geodynamic events - plastic deformation of host rock
Ondraf Niras FEP Number
Ondraf Niras FEP Number
38
FEP Effects
Description of FEP Effects
Plastic deformation may change shape of host rock layer and its physical properties such as density, preferred orientation of host rock minerals and porosity.
Reference(s)
References Relevant to FEP
ER-184_I2
NEA TN2 IFEP Reference(s)
Related IFEPs from the NEA TN2 List of Proposed IFEP Revisions [NEA/RWM/R(2013)8]
1.2.3 Deformation (elastic, plastic or brittle).