Earth & Environmental Sciences
ignimbrite
96%
volcanic eruption
74%
alluvial plain
67%
Miocene
60%
hot spot
54%
subsidence
42%
explosive volcanism
36%
nepheline syenite
35%
lamprophyre
33%
monocline
32%
explosive
31%
mantle
30%
paleomagnetism
30%
magmatism
29%
platinum
28%
volcanic ash
28%
breccia
27%
Gondwana
25%
tuff
25%
graben
25%
dating
25%
accretion
23%
dike
23%
planet
22%
fragmentation
22%
stable isotope
21%
basin
19%
river
17%
solar system
17%
crystal
17%
history
15%
Archean
15%
Medicine & Life Sciences
Hominidae
100%
Indonesia
65%
Fossils
51%
zircon
46%
Mars
38%
Chronology
36%
Crystallization
30%
Oceans and Seas
29%
Occupations
25%
Artifacts
22%
Uranium
20%
Islands
20%