Ocean Anoxic Event 1a (OAE 1a):
The Ocean Anoxic Event 1a (OAE 1a), which occurred around 120 million years ago during the early Aptian, was a significant climatic and environmental event caused by massive volcanic eruptions that released large quantities of CO₂, triggering global warming and oceanic anoxia. The event severely disrupted marine ecosystems, leading to the extinction of several species, particularly plankton, and the formation of organic-rich black shale deposits. The study of this ancient event provides valuable insights into current climate concerns, with modern parallels in human-induced global warming and the potential risks for marine life.
