Volcanic materials cover huge areas. The volcanic materials which initially appeared by following the fault lines then turned into the central eruptions. Fracture faults have caused some significant changes in the topography such as shift of the river valleys, rerise of the alluvial cones and formation of weak zones on the earth crust. Pits filled with rain water. Spread large low viscosity discharge emergence pyroclastic spatter shapes solidification quarry geology geomorphology geological extinction graben field fault line basalt bushes thicket flat frozen lava plateau plain lowland area rocky lakeshore crack stony land rugged terrain lake pond puddle turbid water. 4K UHD 3840×2160 30p.