Pac Bo Cave area is a part of the Lục Khu block dissected weakly result in young karst blocks with trapezoid, connical, pointed pyramid shapes linking through the saddle, U-shaped, V-shaped valleys and fault cliffs (Figure VI.2.20).
|Figure VI.2.20.Young karst landform in trapezoid shape and fault scarp in Pac Bo||Figure VI.2.21. Water fall in Lenin stream|
At Coc Chu, Phu Ngoc Commune, planation surface at elevation of 700-950m expresses obviously the old karst topographic with the associated towers interleaving broad-bottomed valleys, which are used for growing tobacco (Figure VI.2.22).
Ma Phuc pass with the NW-SE fault scarp and the pillow basalts (Figure VI.2.15). Expression of lateral strike-slip fault result in movements of plateau arrays (see Google Earth).
|Figure VI.2.22. Old karst landform in planation surface at elevation of 700-950m in Coc Chu (left) and southern of Pac Bo (right).|