Cover Story：The ductile deformation of the basement in thrust tectonics of the Daba Mountain. The photo shows the southward movement of the thrust developed in quartz schist (Wudang Group, Late Paleozoic) within the hanging-wall of the thrust zone along Chengkou-Fangxian in eastern Daba Mountain. Microscopic research on the outcrop indicates that small folds become thicker at the turning part and get thinner on the wings of the fold, and foliations (cleavages) parallel to the axis of the fold are well developed as the lithologic coordinated deformations. These features represent the rheologic behavior of the rocks that occur under the T/P condition of the formation of muscovite, which is the record of the typical detachment deformation that occurred in the middle crust level. The research achievement directed by Professor DONG Shu-wen, Chinese Academy of Geological Sciences, ranks second among “Top Ten Scientific and Techno-logical Progresses of CAGS in 2009”. For details, see pp.769-780. (Photo by DONG Shu-wen)