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Field geology
3
Germany
3
Hawaii
3
Iceland
3
Igneous rocks
3
Italy
3
Mexico
New Zealand
3
Volcanic rocks
3
Volcanology
3
Auckland
2
California
2
Campi Flegrei caldera
2
Field photography
2
Lake Averno
2
Lava dome
2
Magma
2
Oahu
2
Oregon
2
Pinacate volcanic field
2
Rapa Nui (Easter Island)
2
Scoria cone
2
Sicily
2
Sonora
2
Texas
2
"Brazil nut effect"
1
Airfall deposits
1
Albuquerque
1
Alpine Texas
1
Andesite
1
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