Earth & Environmental Sciences
crater
83%
platinum group element
76%
impact structure
52%
chondrite
48%
melt
46%
rock
32%
impactite
28%
meteorite
26%
Bronze Age
26%
iron meteorite
24%
ejecta
23%
extinction
21%
impactor
20%
Eocene
20%
mass extinction
20%
asteroid
18%
geochemical method
18%
lead isotope
18%
provenance
16%
suevite
16%
planetary surface
16%
fossil record
15%
clay
15%
cratering
15%
isotopic analysis
14%
Cretaceous-Paleogene boundary
14%
chronology
14%
astronomy
13%
Younger Dryas
13%
material
13%
solar system
12%
petrology
12%
geology
12%
transition
12%
flood basalt
12%
Cretaceous
11%
isotopic ratio
11%
plasma
11%
plate tectonics
9%
eukaryote
9%
volcanism
9%
raw material
9%
mass spectrometry
8%
cooling
8%
drilling
8%
breccia
8%
lithology
8%
iron
7%
siderophile element
7%
heat production
7%
isotope
7%
comparison
7%
disequilibrium
6%
metamorphic feature
6%
Paleogene
5%
trace element
5%
endosymbiont
5%
paleoclimatology
5%
Archean
5%
relative abundance
5%
paleoceanography
5%
crater lake
5%
program
5%
detection
5%
ocean
5%
fossil
5%
glass
5%
Physics & Astronomy
impact melts
100%
projectiles
56%
rocks
54%
chondrites
40%
platinum
29%
craters
26%
Ghana
21%
petrology
21%
Namibia
20%
fossils
20%
spherules
19%
chemistry
18%
plates (tectonics)
17%
asteroid belts
17%
chronology
14%
eukaryotes
12%
oceans
11%
breccia
11%
meteorites
11%
lakes
11%
planets
10%
lithology
10%
impactors
9%
Earth surface
8%
drilling
8%
geology
8%
signatures
7%
bombardment
7%
interrogation
6%
prokaryotes
6%
geochemistry
6%
biology
6%
astronomy
6%
continents
6%
solar system
6%
jacks
6%
general overviews
5%
magma
5%
ecosystems
5%
inductively coupled plasma mass spectrometry
5%
dating
5%
igneous rocks
5%
mitochondria
5%
rims
5%