Sulfur isotope evidence for widespread euxinia and a fluctuating oxycline in Early to Middle Ordovician greenhouse oceans

Earth & Environmental Sciences

• sulfur isotope 100%
• carbon isotope 79%
• Ordovician 78%
• sulfate 59%
• deep water 56%
• isotope 50%
• ocean 48%
• anoxia 39%
• biosphere 33%
• euxinic environment 25%
• productivity 23%
• redox conditions 19%
• oxygenation 19%
• decoupling 18%
• water reservoir 17%
• carbonate rock 16%
• marker 14%
• organic carbon 13%
• sulfide 13%
• timescale 12%
• oxidation 11%
• oxygen 10%
• world 9%
• climate 9%

Agriculture & Biology

• oceans 89%
• isotopes 86%
• sulfur 71%
• carbon isotopes 71%
• greenhouses 60%
• sulfates 51%
• biosphere 29%
• Neoproterozoic era 26%
• hypoxia 22%
• carbonate rocks 19%
• water reservoirs 16%
• water 14%
• sulfides 13%
• organic carbon 13%
• climate 9%
• oxidation 8%
• oxygen 8%