I'm teaching the lab portion for soil morphology this semester. Just got back from the field now.
This is what we call a soil ped. "Ped" is a great scrabble word, btw.
We use peds to describe the soil structure using terms such as "subangular blocky", "granular", etc.
The ped above is weathered parent material, or saprolite, and can be found in the lower soil horizons, which in this case we would probably describe as a BC horizon.
When we go to the field to describe soils, we look at the soil profile. Sometimes the soil horizons are easy to pick out, most of the time they are not. They are difficult to see in this picture. But what you can see is the moisture deficit in the upper 10 inches of soil due to the last three years of drought and the well-drained nature of this soil.