1. relating to or formed by the action of hot gases and vapors from magma
Usage: geology

Examples

• The pneumatolytic process created distinctive mineral deposits in the rock.
• Pneumatolytic alteration of the granite produced valuable ore minerals.
• The geologist identified pneumatolytic veins containing tourmaline and topaz.
• These crystals formed through pneumatolytic activity during the cooling of the magma.
• The pneumatolytic stage occurs after the main crystallization of igneous rocks.