Colder climate and oxygen-rich ocean currents laid the foundations for modern marine ecosystems
Published 30 October 2023 The Hällekis quarry in Västergötland hosts Middle Ordovician limestone layers that have been sampled and analysed in the study. Photo: Anders Lindskog. Changes in oxygenation and climate had a fundamental impact on marine environments and ecosystems during one of the most transformative times of the development of life on Earth. This according to a new study in which rese