Posts Tagged ‘billion years’

Diamond’s 2-billion-year growth charts tectonic shift in early Earth’s carbon cycle

A study of tiny mineral ‘inclusions’ within diamonds from Botswana has shown that diamond crystals can take billions of years to grow. One diamond was found to contain silicate material that formed 2.3 billion years ago in its interior and a 250 millio…

Study: Life on land backdated to 3.22 billion years ago

From ScienceDaily: Life took hold on land at least as early as 3.2 billion years ago, suggests a study. The team studied ancient rock formations from South Africa’s Barberton greenstone belt. These rocks are some of the oldest known on Earth, with their formation dating back to 3.5 billion years. … These rocks are some […]

Life on land took hold 300 million years earlier than we thought

Newly discovered evidence of microbial activity in tiny grains of the iron sulfide mineral pyrite indicate that life took hold on land as early as 3.2 billion years ago, a team of German researchers reported this week in Geology, the official journal of the Geological Society of America. Sami Nabhan of the Free University of […]

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