The Jurassic geology of the Niuyingzi-Dengzhangzi area in southern Lingyuan in western oft-com:office:smarttags" />Liaoning Province has challenged geologists for many years. Its most controversial structural element is a narrow (0.1~1.5 km), subvertical, fault-bounded panel of Middle Proterozoic Changzhougou quartzite and, locally, higher Changcheng System units. The geometry of the Dengzhangzi-Changzhougou-Guojiadian structural assemblage was subsequently modified by late Middle Jurassic or early Late Jurassic contraction. The results of the study indicate that the Jurassic tectonic history of the western Liaoning area was considerably more complicated than believed earlier. oft-com:office:office" />