fbpx
Modern Sciences is a premier science journal that bridges the gap between science and its application to society.
The Largest Geode Is a Cave

The Largest Geode Is a Cave

Winemaker Gustav Heineman discovered the largest geode, filled with celestine crystals and measuring over 10 meters across, on South Bass Island, Ohio, in 1897. The geode formed during the Silurian period, around 430 million years ago, when glaciers melted at the end of the last ice age. Lake Erie water seeped into anhydrite pockets, dissolving them and creating caves.

Related Posts