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multiple sulfur isotopes(7)
isotopes(4)
year(4)
devonian-mississippian marine carbonate(3)
first-generation college student(3)
funded proposal(3)
global-ocean redox condition(3)
global-ocean redox curve(3)
icehouse climate(3)
marine animal life(3)
marine anoxia(3)
marine carbonate(3)
multiple large positive 13c excursion(3)
multiple primary school science teacher(3)
ocean circulation(3)
project(3)
pyrites(3)
relative amount(3)
sulfur cycle(3)
sulfur isotope(3)
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