Earth & Environmental Sciences
Lopingian
100%
Guadalupian
95%
chert
71%
tectonics
43%
basin
32%
Permian
12%
large igneous province
11%
hydrothermal activity
10%
Tethys
10%
fossil
6%
paleoceanography
6%
extensional tectonics
5%
ocean
5%
paleogeography
5%
hydrothermal fluid
4%
biological activity
4%
silicon
4%
upwelling
4%
trough
4%
outcrop
4%
rare earth element
3%
silica
3%
quartz
3%
cooling
3%
nutrient
3%
water
1%
analysis
1%
Agriculture & Biology
tectonics
98%
basins
60%
China
42%
paleoceanography
23%
oceans
23%
fossils
22%
palaeogeography
18%
rare earth elements
15%
quartz
13%
silicon
11%
silica
10%
cooling
9%
bioactive properties
9%
fluids
8%
nutrients
6%
water
4%