ASTRON 10 Lecture 19: Volcanism, Volatiles (Surface Ices)
Document Summary
Io - most volcanic object known; no impact craters because so much volcanic activity; sulfur volcanoes. Thin crust probably partially dissolved in liquid methane. If it were not too cold, possibility of life. Ice volcanoes (heating under the surface vaporizing nitrogen ice) Enceladus, triton), volatiles (surface and subsurface ices (mercury, earth, moon, mars, moons of jupiter, saturn, Tectonics and volcanoes are characteristics of solid surfaces. Are present for planets with solid surfaces and molten mantles right beneath. Vegetation usually grows on volcano b/c higher elevation means cooler. Piles up a volcano built up of alternate layers of lava and ash. Lava has high viscosity and does not travel far. Cinders are form by congealed lava violently ejected from a single vent and breaking into small fragments that solidify and fall around the vent to form a circular or oval cone. When lava touches water, steam and cinders are produced. Cinders land around the volcano and pile up.
