A list of puns related to "Early Triassic"
This is an automatic summary, original reduced by 97%.
> We find a sulfur isotope signal of negative Δ33S with either positive δ34S or negative δ34S that implies mixing of sulfide sulfur with different δ34S before, during, and after the end-Permian mass extinction.
> Capital delta notation is also defined to describe relationships involving the least abundant isotopes: Δ33S = δ33S 1,000 1 + δ34S/1,000)0.
> Previous studies have shown that mixing of sulfide having strongly negative δ34S and positive Δ33S with sulfide having positive δ34S and positive Δ33S can produce sulfide with negative Δ33S values.
> The negative Δ33S with negative δ34S at Opal Creek coincided exactly with the extinction horizon, linking sulfidic conditions to the extinction event.
> The absence of negative Δ33S values in this interval and Unit III at Gujo-Hachiman suggests that accumulation of abundant syngenetic pyrite having positive Δ33S compositions overwhelmed the signal of negative Δ33S, consistent with sustained euxinic conditions.
> The negative Δ33S anomaly at the extinction horizon at Opal Creek provides critical evidence that shoaling of sulfidic waters and oscillations between sulfidic and oxic conditions may have been the main killing agents during the mass extinction.
Summary Source | FAQ | Theory | Feedback | Top five keywords: 33^#1 extinction^#2 sulfur^#3 sulfidic^#4 34^#5
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