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
The Dilemma in Finding the Oldest Evidence of Animal Life on Earth
It’s been long presumed by many scientists the world over that modern-day sponges—the humble and porous sea creatures…
Climate change triggering global collapse in insect numbers: stressed farmland shows 63% decline – new research
Tim Newbold, UCL and Charlie Outhwaite, UCL Speed read The world may be facing a devastating “hidden” collapse…
Ghost islands of the Arctic: The world’s ‘northern-most island’ isn’t the first to be erased from the map
These ‘islands’ are on the move. Martin Nissen Kevin Hamilton, University of Hawaii In 2021, an expedition off…
“Davemaoite”: New Mineral Found Inside a Deep-Earth Diamond After Years of Searching
Davemaoite, named after Carnegie Institution for Science Geophysical Laboratory scientist Ho-Kwang “Dave” Mao, is a mineral of calcium…