The Donghe Sandstone was broadly deposited in the early stage of the marine transgression,but it is not an isochronous stratigraphic unit.

• 东河砂岩是一套覆盖广泛的海侵初期的沉积产物,但不是一个等时沉积体,相当于晚泥盆世晚期至早石炭世早期沉积,具体沉积时间各地有差异。