Tiny fold in siliceous siltstone, Santa Rita Mountains, southern Arizona


I am not certain where I collected this, but I believe it was in the Adobe Canyon region of the Santa Rita Mountains in southern Arizona.  I like the fact it is so compact and indurated; extremely strong given what it went through.  It is a nice 3D miniature of larger structures whose full 3-D properties would not be as evident.

Age & Formation
Upper Cretaceous, Adobe Canyon Formation, i.e., ~75 Ma.