Actually these dinosaur eggs are really called Concretions. On our way back from Boulder we had a great time hunting them. They are formed from Iron separating from the sand and forming a shell. I wish I understood more of the particulars but I don't. Kelly really enjoyed this part of our trip!
2 comments:
They're actually called "Moqui Marbles". Read about them here:
http://www.geocities.com/CapeCanaveral/cockpit/8882/moqui.html
I also found this site about them. Looks like they have a lot of different nick-names.
http://en.wikipedia.org/wiki/Moqui_marbles
Cool stuff!
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