Earth & Environmental Sciences
carbon isotope
15%
continental shelf
30%
cooling
11%
deep water
13%
euxinic environment
74%
extinction
69%
geochemistry
13%
glaciation
16%
habitat
10%
habitat loss
18%
Hirnantian
72%
indicator
29%
iron
10%
isotope
12%
mass extinction
95%
molybdenum
17%
nutrient cycling
18%
ocean
19%
Ordovician
76%
organic carbon
12%
organism
11%
oxygen
10%
oxygenation
18%
pyrite
43%
rate
5%
sea level
25%
sea level rise
15%
sulfate
11%
sulfur isotope
19%
transgression
16%
water
5%
water column
13%
Physics & Astronomy
carbon
9%
carbon isotopes
21%
chemistry
11%
China
15%
continental shelves
46%
cooling
9%
cycles
9%
deep water
18%
expansion
8%
extinction
69%
geochemistry
22%
gradients
8%
habitats
39%
intervals
10%
iron
9%
isotopes
11%
molybdenum
13%
nutrients
18%
oceans
29%
organisms
14%
oxygen
8%
oxygenation
17%
poles
12%
pulses
40%
pyrites
57%
sea level
54%
sulfates
14%
sulfur isotopes
24%
water
15%
Chemical Compounds
Chemistry
16%
Column Like Crystal
16%
Cooling
24%
Dioxygen
13%
Geochemistry
38%
Indicator
24%
Nutrient
29%
Organic Carbon
30%
Oxygenation
30%
Pyrite
100%
Redox Indicator
82%
Reduction
12%
Size Distribution
24%
Sulfate
20%
Time
9%