Ever seen a rock that looks washed out — pale, pinkish, greenish, almost pastel? 🎨 That’s not sunlight or weathering — it’s hydrothermal alteration. 💧🔥 When hot fluids from nearby magma move through the rock, they leach out minerals, bleach the color, and leave behind veins of new minerals like epidote. This is the crust’s version of a chemical makeover — evidence of heat, fluids, and geologic change written right into the rock. 🪨 #PlanetGeo #GeologyExplained #HydrothermalAlteration #Bleache