All are remarkable monuments, but those geodes are eons in the making and are literally irreplaceable. “There is no one way to form a geode,” says Gabriela Farfan, an environmental ...

Languages; English. You can get in touch with Hannah by emailing [email protected] The geological history that led to the formation of giant crystals and a 36-foot geode has been revealed by ...

“To reveal their formation has been a very tough task,” study author Juan Manuel García-Ruiz said in a press release. “Unlike in the case of Naica, where the hydrothermal system is still active, the ...

There's something distinctly mysterious and cool about geodes... rocks hidden in plain sight that contain a astonishing array of crystals within, just waiting to be discovered. There are a lot of ...

In a study published Oct. 15 in the journal Geology, García-Ruiz and his colleagues attempted to shed some new light on the mysterious cave by narrowing down how and when the geode formed.

Today on A Moment of Science, we‘ll look at how geodes form and how they collect in such complex patterns. Many people think of geodes as being formed by volcanic activity--but they can also be ...

Amethyst geodes in Uruguay have been found in cooled lava flows, which date from the original breakup of the supercontinent Gondwana around 134 million years ago. However, their formation has ...

The Pulpí Geode was formed in two different phases, starting six million years ago. At first percolating water dissolved the soluble limestone, creating a large cavity. Then groundwater was ...

Amethyst geodes in Uruguay have been found in cooled lava flows, which date from the original breakup of the supercontinent Gondwana around 134 million years ago. However, their formation has ...

Any geode might make us wonder: What geologic forces form these hollows lined with crystals? But the Pulpí Geode, discovered in an abandoned Spanish mine, takes wonder to a different scale.