Sedimentary Structures
Cochise College        
Photos of Rocks         Sedimentary Rocks
Virtual Geology Museum       Hall of Rocks

Geology Home Page              

Roger Weller, geology instructor

wellerr@cochise.edu    copyright 2011-R.Weller

cone-in-cone structures-B
closer view
These structures most often occur in thin layers of shale; these structures are a
series of right circular cones developed one within the next and are caused by a
pressure solution process.
 

cone-in-cone                                                                                                                                      6000

Photo is copyright free for non-commercial educational uses. 
Just credit photo to R.Weller/Cochise College.
 

Specimen courtesy of Yavapai Community College
Beth Boyd