The features of rock finite strain in the superimposed fold area under buckling are comprehensive results of multiphase deformation. The stretching direction of the strain far away from the superimposed area is congruent with the axes of the fold, and the shortening direction is vertical to fold axes. The strain pattern in the superimposed area is irregular, and the difference between the stretching and shortening amounts of the strain ellipsoid is reletively small.
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黄继钧.2000.纵弯叠加褶皱地区岩石有限应变特征:以川东北地区典型叠加褶皱为例[J].地质论评,46(2):178-185,[DOI]. Huang Jijun.2000. The Features of Finite Strain of Rocks in the Superimposition Fold Area Under Buckling in Northeast Sichuan Province[J]. Geological Review,46(2):178-185.