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Field geology
Germany
Igneous rocks
3
New Zealand
3
North Island
Volcanic rocks
3
Volcanology
3
California
2
Devitrification
2
Iceland
2
Italy
2
Magma
2
Mexico
2
Moeraki Point
2
SW Greenland
2
Acid crater lake
1
Alpine Texas
1
Andesite dike
1
Arsenic sulfide
1
Augusta
1
B. G. J
1
Bacterial count
1
Basaltic dike
1
Big Bend National Park
1
Bilateral symmetry
1
Black Dragon mudpot
1
Boiling pool
1
Brian Geoffrey Johnson Upton
1
Bumpass Hell
1
CO2 carbon dioxide
1
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