Earth & Environmental Sciences
alluvial fan
12%
anthropogenic effect
13%
Archean
12%
asteroid
17%
avulsion
15%
Barents Sea
12%
basin
25%
bivalve
35%
Bronze Age
22%
calibration
20%
carbon isotope
19%
carbonate
12%
carbonate platform
13%
cave
21%
chemostratigraphy
13%
chondrite
31%
chondrule
14%
clay
14%
crater
64%
cratering
21%
Cretaceous
22%
Cretaceous-Paleogene boundary
42%
cyclostratigraphy
13%
Deep Sea Drilling Project
14%
dissolution
12%
dolostone
14%
drilling
19%
eccentricity
14%
Eifelian
25%
ejecta
27%
emplacement
14%
encyclopedia
51%
environmental change
13%
Eocene
24%
extinction
16%
Frasnian
45%
Frasnian-Famennian boundary
15%
geochemistry
35%
Givetian
14%
hematite
12%
history
18%
Holocene
40%
impact structure
54%
impactite
50%
impactor
33%
Indian Ocean
42%
intertropical convergence zone
28%
iron
11%
iron meteorite
28%
isotope
32%
isotopic analysis
17%
isotopic composition
14%
limestone
14%
magnetic susceptibility
76%
mass extinction
18%
mass spectrometry
13%
material
16%
melt
30%
metal
12%
meteorite
46%
mineral
15%
monsoon
55%
olivine
19%
organic matter
12%
osmium isotope
11%
oxygen isotope
17%
Paleocene
14%
paleoclimate
19%
paleoecology
13%
Paleozoic
12%
petrography
12%
plain
12%
platinum group element
100%
precession
21%
provenance
19%
quarry
12%
rare earth element
14%
river
29%
rock
34%
salinity
17%
sediment
14%
shell
27%
siderophile element
26%
solar activity
12%
stable isotope
22%
stalagmite
37%
stratigraphy
18%
time series
12%
timescale
32%
trace element
13%
ureilite
13%
water
12%
Younger Dryas
52%
Physics & Astronomy
asteroid belts
8%
Belgium
12%
breccia
8%
carbon isotopes
8%
carbonates
6%
chemistry
9%
China
6%
chondrites
11%
climate change
8%
comets
6%
cratering
19%
craters
24%
Cretaceous-Tertiary boundary
23%
dissolving
5%
drilling
6%
ejecta
6%
fallout
5%
fans
12%
flight
6%
fragments
6%
Ghana
10%
glass
5%
greenhouses
5%
habitability
8%
hematite
6%
impact melts
51%
impactors
6%
intervals
5%
Iran
18%
iridium
6%
irrigation
6%
isotope ratios
13%
isotopes
7%
lakes
7%
lithology
5%
magnetite
6%
meteorites
8%
Mexico
7%
microorganisms
6%
minerals
6%
mountains
7%
Namibia
9%
osmium isotopes
10%
oxygen isotopes
8%
petrology
10%
planets
5%
platinum
15%
plumage
11%
Poland
7%
projectiles
21%
rhythm
7%
rivers
12%
rocks
30%
siderophile elements
11%
signatures
5%
spherules
28%
spinel
5%
statistical analysis
5%
surface reactions
5%
ureilites
11%