Earth & Environmental Sciences
impact structure
100%
crater
83%
suevite
46%
melt
42%
Cretaceous-Paleogene boundary
37%
rock
33%
drilling
26%
ocean
25%
Paleogene
17%
lithology
16%
mass extinction
16%
granitoid
15%
program
14%
cratering
14%
zircon
12%
gulf
12%
iridium
12%
Cretaceous
12%
geochemistry
11%
basement rock
11%
ejecta
9%
dike
9%
siderophile element
9%
diabase
9%
Pangaea
9%
seafloor
9%
titanite
8%
basin
8%
hydrothermal system
8%
carbonate
7%
magmatism
7%
meteorite
7%
overprinting
7%
continental arc
7%
Gondwana
7%
fluidization
7%
palynology
6%
hypoxia
6%
Eocene
6%
petrogenesis
6%
earth's crust
6%
volatilization
6%
emplacement
6%
formation mechanism
6%
microstructure
6%
granite
6%
geochronology
6%
Paleocene
5%
shock metamorphism
5%
P-wave
5%
South America
5%
condensation
5%
wave velocity
5%
silicate
5%
sedimentary rock
5%
breccia
5%
solar system
5%
dust
5%
global warming
5%