![]() ![]() Embedded within it are layers of clay, carbonates, shale, and iron-rich volcanic rocks, some of which have taken on vivid shades of red, yellow, and orange as they moved upward and interacted with water and minerals from other rock layers. The rising mass is not purely made of salt. Rock salt, or halite, is weak and buoyant, so it loses its brittleness and flows more like a liquid when under high pressure. The island is a salt dome-a teardrop-shaped mound of rock salt, gypsum, anhydrite, and other evaporites that has risen upward through overlying layers of rock. ![]() With its colorful soils, salt caves and mountains, and ocher-stained streams and beaches, Iran’s Hormuz island is rich with memorable geology. Iran's Rainbow Island - September 23, 2020 Iran's Rainbow Island - Persian Gulf (NASA)
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