Long ago, Minnesota's North Shore erupted with volcanic activity, creating stunning agates that tell the story of the state's geological history and its volcanic roots.

Giant agates found in an island on Panama's Pacific coast prompted a study on how the Isthmus evolved and became a bridge between two continents ...

Giant agates found in an island on Panama's Pacific coast prompted a study on how the Isthmus evolved and became a bridge between two continents ...

How are agates formed? Agates are formed when gas bubbles in lava leave a hole in the "vesicle" in the rock, according to the Michigan Department of Environment, Great Lakes, and Energy.

“This would also help explain how the egg agate formed,” the museum said. “It’s possible that shortly after a titanosaur laid its eggs in the warm sands, a nearby volcano erupted.” ...

140 years ago, an agate specimen from India was registered in the Mineralogy Collection at London’s Natural History Museum. Now, a team of researchers say the suspiciously spherical agate formed ...

How are agates formed? Agates are formed when gas bubbles in lava leave a hole in the "vesicle" in the rock, according to the Michigan Department of Environment, Great Lakes, and Energy.