DISCOVERY OF GIGANTIC EARLY CAMBRIAN FOSSIL ZONE AND DISINTEGRATION OF INNER MONGOLIA EARTH AXIS

In 1944-1945, the Inner Mongolia Earth Axis(IMEA) was proposed by Prof. HUANG Ji-qing as a consistently uprising unit of Archean basement and a tectonic unit in 'On Major Tectonic Forms of China'. It is distributed on the north margin of North China Platform. However, in 1987-1989, the authors made an expedition along the so-called 'IMEA' when they studied the geotectonic evolution of the north margin.