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 20110-R.Weller

chert nodules- A
Horquilla limestone, Cochise County, Arizona
 

chert                                                                                                                                            chert2

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