GeoKhan Academy on Instagram: "This is how vesicles form in Basalt 1. Magma Contains Dissolved Volatiles • Basaltic magma, which originates from partial melting of the mantle, contains dissolved gases such as: • H₂O (water vapor) • CO₂ (carbon dioxide) • SO₂, H₂, and other minor gases • These gases stay dissolved at high pressures deep within the Earth. ⸻ 2. Ascent & Pressure Drop • When basaltic magma rises toward the surface (mid-ocean ridges, oceanic hotspots, continental rifts, or flood basa