About Rocks, Minerals and Volcanoes Quiz #839
Rocks, Minerals and Volcanoes Quiz #839 was the quiz for Monday, October 19, 2026: 10 questions: 3 easy, 4 medium and 3 hard. Everyone who played Rocks, Minerals and Volcanoes Quiz that day got the same quiz, and it stays here to play for 60 days.
The questions of Rocks, Minerals and Volcanoes Quiz #839
- Which white or veined rock has been carved by sculptors such as Michelangelo?
- Which rock formed from plant material buried in ancient swamps?
- What is the bowl-shaped opening at the top of a volcano called?
- Which mineral peels apart into thin, see-through sheets?
- Which tall, cone-shaped volcanoes are built from many layers of lava and ash?
- Which soft white rock, made from the remains of tiny sea organisms, forms the White Cliffs of Dover?
- Which body of water sits in the middle of the Canadian Shield?
- The 1815 eruption of which volcano led to 1816's "Year Without a Summer"?
- The Acasta Gneiss, among the oldest known rocks on Earth, is found in which part of Canada?
- What number does quartz have on the Mohs hardness scale?
The answer options and the answers appear only when you play the quiz, one question at a time.
New to Rocks, Minerals and Volcanoes Quiz? The rules, tips and common questions are on the Rocks, Minerals and Volcanoes Quiz page.
Other days of Rocks, Minerals and Volcanoes Quiz
- Rocks, Minerals and Volcanoes Quiz #842, Oct 22
- Rocks, Minerals and Volcanoes Quiz #841, Oct 21
- Rocks, Minerals and Volcanoes Quiz #840, Oct 20
- Rocks, Minerals and Volcanoes Quiz #838, Oct 18
- Rocks, Minerals and Volcanoes Quiz #837, Oct 17
- Rocks, Minerals and Volcanoes Quiz #836, Oct 16
- Today’s quiz, #851
Every day of the last 60 is in the puzzle archive.