Oxygen came late to ocean depths during Paleozoic, isotope analysis reveals

Oxygen came late to ocean depths during Paleozoic, isotope analysis reveals

The explosion of animal life in Earth's oceans half a billion years ago during and after the Cambrian Period is commonly attributed to a substantial and sustained rise of free oxygen (O2) in seawater. Some researchers even argue for near-modern levels of ocean oxygenation at this time.

Dynamic Deep Marine Oxygenation During The Early And Middle Paleozoic - Astrobiology

The Early Paleozoic radiation of diverse animal life is commonly connected to a well-ventilated global ocean. Yet the oxygenation history of Paleozoic deep oceans remains debated. Using thallium (Tl) isotope ratios in deep-marine mudrocks, we reconstruct the history of deep marine oxygenation from ~485 to 380 million years ago. Thallium isotopes can track bottom water […] The post Dynamic Deep Marine Oxygenation During The Early And Middle Paleo…