Bladed barite crystals

A close-up image of bladed barite crystals in the Mapepe Formation in the Barberton Greenstone Belt of South Africa.

Credit: Desiree Roerdink

• New research uncovers continental crust emerged 500 million years earlier than previously thought (26 April 2021)

• Original image (580.5 KB, 1430.0x1078.0 px)
• Preview image (222.6 KB, 1280x965 px, JPEG format)

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