The AAPG/Datapages Combined Publications Database
AAPG Bulletin
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AAPG Bulletin; Year: 2019; Issue: October DOI: 10.1306/0130191516517255
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Figure 8. Development of internal strain during structural restoration. (A) Forward deformation with a shear angle of 90° in the hanging wall (HW) of a listric fault using inclined shear. The circle undergoes both rotation and shear. (B) The geologic model of the study area represents the deformed present-day state. By restoring the HW, one is able to analyze the 
strain magnitude, where 
is the principal major strain axis and e is the strain value. The strain ellipse caused by structural restoration has the same magnitudes, but as in forward deformation, their axes, which are mirrored around a vertical axis, include rotation. The angle β is the shear angle. FW = footwall.
Figure 8. Development of internal strain during structural restoration. (A) Forward deformation with a shear angle of 90° in the hanging wall (HW) of a listric fault using inclined shear. The circle undergoes both rotation and shear. (B) The geologic model of the study area represents the deformed present-day state. By restoring the HW, one is able to analyze the strain magnitude, where is the principal major strain axis and e is the strain value. The strain ellipse caused by structural restoration has the same magnitudes, but as in forward deformation, their axes, which are mirrored around a vertical axis, include rotation. The angle β is the shear angle. FW = footwall.