Earth & Environmental Sciences
thermal spring
89%
Mars
73%
sinter
71%
silica
63%
crater
38%
preserve
15%
biomarker
15%
volcaniclastic deposit
14%
geyser
14%
microbial community
13%
hydrocarbon
11%
hydrothermal system
10%
organic geochemistry
10%
fieldwork
9%
rock
9%
opal
9%
fluid
9%
aromatic compound
8%
emplacement
8%
stratigraphy
8%
naphthalene
8%
breccia
8%
aromatic hydrocarbon
8%
crystallinity
8%
sulfur
7%
texture
7%
quartz
5%
cooling
5%
history
5%
laboratory
5%
Physics & Astronomy
Mars craters
92%
mars
58%
silicon dioxide
49%
deposits
40%
volcanology
21%
geysers
19%
rocks
19%
hydrothermal systems
18%
stratigraphy
17%
Columbia (Orbiter)
14%
hydrocarbons
14%
vents
13%
biomarkers
13%
craters
11%
soils
10%
ridges
9%
sulfur
9%
proximity
9%
breccia
9%
textures
8%
histories
8%
geochemistry
7%
aromatic compounds
7%
Chile
6%
naphthalene
5%
fluids
5%
Agriculture & Biology
hot springs
100%
silica
64%
rocks
19%
stratigraphy
16%
sampling
14%
preserves
14%
microbial communities
9%
hydrocarbons
9%
biomarkers
9%
sulfur
8%
geochemistry
8%
texture
8%
history
7%
fluids
7%
opal
7%
research support
6%
aromatic hydrocarbons
6%
naphthalene
6%
quartz
5%
soil
5%