the surface of the karst rock is indented with furrows and convolutions.

madagascar formation indented bemaraha surface furrows closeup texture geology pattern tsingy relief karst rock view top eroded limestone grey stone unique formation erosion furrows geological surface convolution furrow eroded rough geologic gray bizarre stones formations great tsingy bizarre form close incredible pattern fossil geology unesco unaffected texture background indent detail full madagascar karst sharp view top natural rocks geological cliff phenomenon rock bemaraha