Historical clue formulations

• Mauna Loa output — 2026-09-23
• Kilauea output — 2026-05-13
• Hot stuff — 2026-01-07
• It runs hot — 2025-12-07
• Red-hot flow — 2025-11-03
• 40-Across output — 2025-10-07
• Source of much igneous rock — 2025-10-06
• It goes with the flow — 2024-12-01
• What baking soda and vinegar simulate, in a classic science fair experiment — 2024-09-24
• The Floor Is ___ (kids' make-believe game) — 2024-08-21
• It runs hot — 2024-04-09
• ___ cake (dessert with a liquid chocolate core) — 2024-03-12
• Hot topping for a cone? — 2024-02-22
• Hot stuff — 2023-12-13
• What magma becomes when it's erupted — 2023-10-30
• It comes out on top — 2023-09-10
• Kind of lamp or cake — 2023-08-01
• Volcano output — 2023-07-31
• Volcano's output — 2023-06-19
• Mount Etna output — 2022-11-28
• It can harden into igneous rock — 2022-07-26
• It's hot stuff! — 2021-12-17
• Stream from a volcano — 2021-05-03
• Volcanologist's study — 2021-01-07
• Molten flow — 2020-08-31
• Rolling rock? — 2020-08-05
• Volcanic output — 2020-06-22
• "Ingredient" in molten chocolate cake — 2020-06-01
• Volcanic flow — 2020-03-03
• Outpouring from a volcano — 2019-12-09
• Volcano's spew — 2019-04-02
• Volcano's spew — 2019-03-11
• Volcanic flow — 2018-12-17
• What obsidian forms from — 2018-12-02
• Volcanic rock — 2018-09-17
• It flows and glows — 2018-09-06
• Rock that rolls? — 2018-04-04
• ___ flow — 2018-01-23
• Composition of some beds — 2017-12-30
• It goes with the flow — 2017-07-13
• What a volcano erupts — 2016-05-30
• Volcanic output — 2015-12-07
• Volcano's output — 2015-10-12
• Chocolate ___ cake (dessert with a molten center) — 2014-10-27
• Slow flow — 2014-10-14
• Mauna Kea emission — 2014-03-25
• Volcanic emission — 2013-12-31
• Volcanic flow — 2013-07-01
• Soap brand that contains pumice — 2013-05-15
• Volcanic emission — 2013-04-29