So after loading a new map for 1.8 I found a desert. In the desert is a few spots where there is no sand but a blank stone face with assorted dirt, coal, etc. There is sand nearby and it gradually drops to this spot. The average height of these are y = 66. Is this just a feature of the desert biome or do others have this feature too?

Also you can see it across the river in my forest biome.
1.7.3. I always thought that this would be somekind of feature, though, could be a calculation int he algorithm gone wrong, too. – Bobby Nov 12 '11 at 20:19