Earth & Environmental Sciences
biomarker
100%
oil
92%
sediment
45%
sulfate
44%
fossil
43%
thermal maturity
40%
organic matter
40%
hydrocarbon
38%
petroleum
38%
granite
37%
Raman spectroscopy
37%
Torridonian
37%
Mars
34%
rock
34%
meteorite
32%
carbonate
32%
shale
32%
impact structure
31%
biodegradation
29%
geochemistry
29%
fluid
29%
fluid inclusion
29%
Cretaceous
28%
oxygenation
27%
source rock
27%
Ordovician
26%
basin
26%
basement rock
26%
limestone
26%
kerogen
26%
carbon
25%
terrestrial environment
25%
mineral
25%
Proterozoic
24%
continental breakup
24%
diagenesis
24%
organic carbon
24%
sulfide
24%
lake
23%
organic compound
23%
Jurassic
23%
geological time
22%
calcite
22%
microbial activity
22%
emplacement
21%
material
20%
heavy oil
20%
history
20%
thermal alteration
20%
crater
20%
Physics & Astronomy
biomarkers
73%
sediments
72%
organic compounds
51%
fossils
50%
rocks
43%
ice
40%
mars
39%
minerals
37%
ejecta
33%
meteorite collisions
33%
geochemistry
31%
oils
29%
oceans
27%
hypervelocity impact
27%
sulfates
26%
gypsum
23%
carbonates
21%
veins
21%
shock
20%
Raman spectroscopy
18%
histories
18%
impact melts
17%
spheroids
17%
water
17%
ejection
16%
biosphere
16%
chemistry
16%
molecules
16%
basements
16%
Sudan
15%
sandstones
15%
Iran
14%
uranium isotopes
14%
carbon
14%
projectiles
14%
biodegradation
13%
hydrocarbons
13%
meteorites
13%
organic materials
13%
fungi
13%
crusts
12%
ecosystems
12%
shales
12%
trace elements
12%
European Space Agency
12%
craters
11%
inclusions
11%
sands
11%
anthracene
11%
nutrients
11%