Gwyddorau Amgylcheddol a’r Ddaear
volcano
93%
ice
71%
volcanic eruption
70%
tuff
70%
caldera
52%
lithofacies
51%
magma
47%
lava
43%
flood basalt
39%
volcanism
34%
volcaniclastic deposit
31%
Antarctica
31%
trachyte
30%
phreatomagmatism
29%
peperite
29%
crater
26%
clast
24%
pyroclastic flow
24%
lava flow
23%
breccia
23%
fissure
22%
cold wave
22%
volcanology
22%
explosive
21%
ash flow
21%
rift zone
21%
immiscibility
21%
sediment
21%
explosion
20%
dike
19%
drainage
19%
fragmentation
19%
ice thickness
18%
Aptian
18%
hyaloclastite
18%
ash
17%
Tethys
17%
infrared spectroscopy
17%
history
16%
basalt
16%
paleoclimate
16%
pumice
15%
emplacement
15%
pillow lava
14%
meltwater
14%
flow field
14%
remote sensing
14%
roughness
14%
product
13%
province
13%
Ffiseg a Seryddiaeth
volcanology
100%
lava
71%
basalt
70%
deposits
59%
Iceland
58%
British Columbia
54%
ice
52%
magma
47%
sediments
44%
Canada
39%
ashes
37%
trachyte
35%
rock intrusions
33%
Kenya
30%
volcanic eruptions
30%
breccia
29%
intrusion
28%
Republic of South Africa
24%
volcanoes
21%
rocks
21%
vents
19%
craters
18%
carbonates
18%
ridges
17%
histories
17%
explosions
17%
water
14%
fragmentation
14%
solubility
14%
infrared spectroscopy
14%
flow distribution
13%
roughness
13%
actuators
13%
electron microscopes
12%
gas expansion
11%
margins
11%
scanning electron microscopy
10%
scanning
10%
cones
9%
liquids
8%
drainage
8%
silicates
7%
globules
7%
remote sensing
6%
sandstones
6%
lake ice
5%
caps
5%
glass
5%
