Some of them are sharp and pointed, others are grotesquely rounded and bulbous. The rock looks like clay, or soft sandstone but it is actually quit hard. I imagine that it softens in the rain. The overall impression is that you are viewing a freeze frame of a landscape that is melting and flowing under the forces of erosion. Ridges, shaped like inverted flattened U's, crawl haphazardly across the landscape.
Smaller ridges slope down from the main ones, in leaf vein patterns, like cathedral ramparts.
Between the ridges and side ridges are deep impenetrable canyons. You can sometimes see the rock strata on a ridge where the dusty soil and gravel have been washed away. These jagged hills are filled with jumbles of pocket canyons. Stream beds in the canyons offer the only level ground to hike on. Perched atop many of the needle sharp peaks, seen here, are small flat boulders.