How are geodes formed, and where can they be found in Indiana?
IMPORTANT: You should seek permission from the Indiana Department of Transportation and from the Indiana State Police or local county sheriff’s office to collect along road cuts. If you do collect along road cuts, be sure that you and your vehicle are well off the road and do not pose a traffic hazard. Collecting on private property requires permission from the owner. Collecting at state parks is strictly prohibited, but limited collecting may be possible at some state or federally owned or managed properties if you have obtained permission or a permit. For information about collecting in the Hoosier National Forest, go to the forest’s Web site, send an e-mail message, or call 812-275-5987. For information about collecting at state forests or reservoirs, contact the Indiana Department of Natural Resources. Most geodes formed long ago when the rocks that now contain them were still soft sediment. Many Indiana varieties began as cauliflower-like growths of a salt called gypsum that were
