sentences:  Heated by rising magma to or more, the water was forced upward again, chemically altering the rocks it encountered and becoming rich in dissolved minerals.When the hot solution emerged from a hydrothermal vent at the bottom of the ocean, its dissolved minerals solidified and fell to the sea floor.The accumulating sulfide deposits from two such vents formed the ore bodies, the United Verde and the UVX, most important to Jerome 1.75 billion years later.