Within the world’s oldest crystals, collected from the Jack Hills in Western Australia, lie the remains of even older rocks—some of which have been reprocessed by magma into the remaining crystals. Using machine learning, geologists have revealed that a third of these ancient rocks were sedimentary. This means that more than four billion years ago, … Read more
This article was reviewed according to Science fact checked peer-reviewed publication trusted source proofread OK! A quarry illustrating bands of layered limestone from the ancient seabed in what is now Mercato San Severino in Italy. Credit: F. Tissot × close to A quarry illustrating bands of layered limestone from the ancient seabed in what is … Read more
A quarry illustrating bands of layered limestone from the ancient seabed in what is now Mercato San Severino in Italy. Credit: F. Tissot About 183 million years ago, volcanic activity in modern South Africa unleashed an estimated 20,500 gigatons of carbon dioxide (CO2) in the ocean-atmosphere system over a period of 300 to 500 thousand … Read more