Table:
0
A
B
C
D
E
1
Name of lava dome
Country
Volcanic area
Composition
Last eruption or growth episode
2
Chaitén lava dome
Chile
Southern Volcanic Zone
Rhyolite
2009
3
Cordón Caulle lava domes
Chile
Southern Volcanic Zone
Rhyodacite to Rhyolite
Holocene
4
Galeras lava dome
Colombia
Northern Volcanic Zone
Unknown
2010
5
Katla lava dome
Iceland
Iceland hotspot
Rhyolite
1999 onwards
6
Lassen Peak
USA
Cascade Volcanic Arc
Dacite
1917
7
Mount Meager lava domes
Canada
Cascade Volcanic Arc
Dacite
2350 BP
8
Mount Merapi lava dome
Indonesia
Sunda Arc
Unknown
2010
9
Nea Kameni
Greece
South Aegean Volcanic Arc
Dacite
1950
10
Novarupta lava dome
Alaska ( USA )
Aleutian Arc
Unknown
1912
11
Nevados de Chillán lava domes
Chile
Southern Volcanic Zone
Dacite
1986
12
Puy de Dôme
France
Chaîne des Puys
Unknown
ca. 5760 BC
13
Santa María lava dome
Guatemala
Central America Volcanic Arc
Dacite
2009
14
Sollipulli lava dome
Chile
Southern Volcanic Zone
Andesite to Dacite
1240 ± 50 years
15
Soufrière Hills lava dome
Montserrat
Lesser Antilles
Andesite
2009
16
Mount St. Helens lava domes
USA
Cascade Volcanic Arc
Dacite
2008
17
Torfajökull lava dome
Iceland
Iceland hotspot
Rhyolite
1477
18
Tata Sabaya lava domes
Bolivia
Andes
Unknown
~ Holocene
19
Valles lava dome
USA
Jemez Mountains
Unknown
50,000-60,000 BP

Questions and formulas:
Question: Which lava domes erupted or had a growth episode during the Holocene period?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,E1="Holocene"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E19,E2:E19="Holocene"),1))
Level: medium
Question: What is the composition at Valles lava dome?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="Valles lava dome"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E19,A2:A19="Valles lava dome"),4))
Level: medium
Question: How many countries are the Tata Sabaya Lava domes located in?
Formula: ROWS(UNIQUE(FILTER(B1, A1="Tata Sabaya lava domes")))
Formula2: ROWS(UNIQUE(FILTER(B2:B19, A2:A19="Tata Sabaya lava domes")))
Level: medium
Question: What countries have had eruptions of growth episodes in 1986?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,E1="1986"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E19,E2:E19="1986"),2))
Level: medium