Clay content is 30 to 55 percent. Gravel content is 0 to 5 percent. The Bssk horizon has dry and moist colors similar to the A horizon. It is silty clay, or clay. Gravel content ranges from 0 to 15 percent.
Structures ranges from weak coarse angular blocky to strong very coarse prismatic structure.
Some pedons are structureless. It is slightly to violently effervescent with segregated lime ranging from fine to medium soft masses or filaments. Clay content is 40 to 60 percent. There are the Alo , Altamont , Auld , Bosanko , Cibo , Cropley , Diablo , Myers , Porterville , Sehorn , and Vaquero series. Alo and Bosanko soils have cracks that are closed for more than 90 days.