Lithophysa (Thundereggs) Photos
Cochise College
Photos of Rocks       
Igneous Rocks
Geology Home Page
Roger Weller, geology instructor                   copyright 2011


lithophysa, cut to show structure

This thunderegg has been cut in half to show the internal structure.
Typically, the internal structure of a lithophysa appears to have undergone
shrinkage, creating open gaps that are then filled with agate material.


lithophysa                                                                                                                                           1

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