一、本区志留纪地层研究概况昭乌达盟以赤峰—具子府一线为界,其北即属内蒙华力西晚期褶皱带。志留系为本区出露最老之地层。河北省地质队于1960～1965年作区域地质调查时首次研究了该地层,将出露于锡林郭勒河畔乌套海一带之结晶片岩系命名为“锡林郭勒杂岩”,并与该区以南零星出露地以绿色片岩为主的一套变质杂岩一同划归志留泥盆系。1964～1970年,我队作中 First, the area Silurian stratigraphic research profile Zhao WUDA to Chifeng - a sub-government line for the sector, the north is Inner Mongolia Warisi fold belt. Silurian as the region exposed the oldest strata. Geological team from 1960 to 1965 for regional geology survey for the first time in the study of the strata, exposed to the Xilin Gol River in the area around the Wulanhai crystalline schist named "Xilin Gol complex, and sporadic south of the area A set of metamorphic rocks, mainly of green schist, are grouped together in the Zhili Devonian system. 1964 ~ 1970, my team made