Sword Testing Stone

Swordstone is named because it resembles being split by a divine sword. It is a rock divided into two plates, the widest of which is more than 80 centimeters. The rock is the biotite monzonite of Songlin Bay Unit in Yanshanian Period. It develops vertical joints (cracks) with a strike of 40 degrees. Because of the erosion and denudation of the vertical joints along the rock mass, the cracks are gradually deepened and widened, or the joints are cracked.