Looking at the eggs on this page one might not be convinced that these come from one bed ….
I think this set tells the story of (at least a part of) the McDermitt area very well. It seems that the layers in which thundereggs are found, have been broken, scattered and shaken up by major geological events. Result is, that in very short distance, eggs with quite different appearance can be found.
Same story in the former Blue Ridge claim: anohter hole might produce eggs with distinctive characteristics.
The former Blue Ridge claim, established by Robert Colburn, is just next to the Blue bed. Some of the eggs are extreme rich of gasbubbles, a mutual characteristic with ‘Quinn River type’ eggs.