Exmagma

Exmagma refers to magma that has been expelled onto the surface of a planet or other solid celestial body. It is synonymous with lava. The term "exmagma" emphasizes the origin of the material from a magma chamber or other subsurface source, rather than simply focusing on its surface manifestation. This term is often used in geological or planetary science contexts to distinguish between the subsurface source (magma) and the surface expression (lava). The composition of exmagma can vary widely depending on the source material and the geological processes that occur during its ascent and eruption. It can range from basaltic to rhyolitic in composition and may contain varying amounts of dissolved gases and solid crystals. The study of exmagma, including its chemical composition, physical properties, and eruption styles, provides valuable insights into the internal dynamics and geological history of the planet or celestial body from which it originated.