Mathematics – Logic
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008areps..36..251m&link_type=abstract
Annual Review of Earth and Planetary Sciences, vol. 36, p.251-288
Mathematics
Logic
20
Scientific paper
Euxinic ocean conditions accompanied significant events in Earth history, including several Phanerozoic biotic crises. By critically examining modern and ancient euxinic environments and the range of hypotheses for these sulfidic episodes, we elucidate the primary factors that influenced the generation of euxinia. We conclude that periods of global warmth promoted anoxia because of reduced solubility of oxygen, not because of ocean stagnation. Anoxia led to phosphate release from sediments, and continental configurations with expansive nutrient-trapping regions focused nutrient recycling and increased regional nutrient buildup. This great nutrient supply would have fueled high biological productivity and oxygen demand, enhancing oxygen depletion and sulfide buildup via sulfate reduction. As long as warm conditions prevailed, these positive feedbacks sustained euxinic conditions. In rare, extreme cases, euxinia led to biotic crises, a hypothesis best supported by evidence from the end-Permian mass extinction.
Kump Lee R.
Meyer Katja M.
No associations
LandOfFree
Oceanic Euxinia in Earth History: Causes and Consequences does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Oceanic Euxinia in Earth History: Causes and Consequences, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oceanic Euxinia in Earth History: Causes and Consequences will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1407592