Earth & Environmental Sciences
basalt
22%
calculation
14%
cooling
18%
crust
40%
crystallization
42%
dike
24%
fault zone
24%
fractionation
22%
lava
54%
magma
20%
mantle source
27%
mid-ocean ridge basalt
57%
oceanic crust
26%
program
14%
rare earth element
22%
rate
26%
rock
12%
spreading center
32%
submersible
30%
tectonics
17%
trace element
20%
transform
41%
transform fault
99%
trend
26%
upper crust
55%
volcanic eruption
22%
Physics & Astronomy
axial flow
20%
basalt
45%
cooling
10%
crusts
100%
crystallization
24%
Earth mantle
18%
escarpments
94%
estimates
9%
fetuses
22%
fractionation
19%
lava
51%
magma
23%
mid-ocean ridges
29%
rare earth elements
13%
rock intrusions
27%
rocks
15%
tectonics
25%
trace elements
21%
trends
23%
volcanic eruptions
19%
Chemical Compounds
Cooling
35%
Crystallization
55%
Flow
25%
Fractionation
35%
Lanthanoid Atom
29%
Molecular Cluster
25%
Spreading
42%
Time
14%