Lithophysa (Thundereggs) Photos
Cochise College
Photos of Rocks       
Igneous Rocks
Geology Home Page
Roger Weller, geology instructor                       

wellerr@cochise.edu    copyright 2011


thunderegg-A

If the lithophysa occurs within an obsidian, as the obsidian breaks down and is
eroded away, the rounded structure is left intact and has been called a thunderegg.

 


lithophysa                                                                                                                                            2

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