Volcanodle
Puzzle #8 was Three Sisters.
The north-south-trending Three Sisters volcano group dominates the landscape of the Central Oregon Cascades. All Three Sisters stratovolcanoes ceased activity during the late Pleistocene, but basaltic-to-rhyolitic flank vents erupted during the Holocene, producing both blocky lava flows north of North Sister and rhyolitic lava domes and flows south of South Sister volcano.
Read about it at the Global Volcanism Program →
Global Volcanism Program, Smithsonian Institution
What the record says
Puzzle 8 ran on 17 Jul 2026 and the answer was Three Sisters, played with 6 guesses against 8 columns. On the record: Country - United States; Region - North America Volcanic Regions; Type - complex; Tectonic setting - subduction; Elevation - 3000-5000; Last eruption - older-Holocene; Rock type - andesite; Historically observed - observed.
Beyond the grid the record adds Largest recorded eruption - VEI 4; Holocene eruptions recorded - 6 eruptions.
Volcanodle builds its record from Global Volcanism Program, Smithsonian Institution (Venzke, E. (ed.), Volcanoes of the World, volcano.si.edu). The description above comes from the same place the game credits on every reveal: A verbatim excerpt of the volcano's GVP Geological Summary. The puzzle itself is still playable in the archive, and every answer that has been and gone is listed on the past-answers page.
How it scored
- Country
- United States
- Region
- North America Volcanic Regions
- Type
- complex
- Tectonic setting
- subduction
- Elevation
- 3000-5000
- Last eruption
- older-Holocene
- Rock type
- andesite
- Historically observed
- observed
Also on the record
- Largest recorded eruption
- VEI 4
- Holocene eruptions recorded
- 6 eruptions