When minerals are deposited from hot underground water and fill the cracks in rocks they are called:

When minerals are deposited from hot underground water and fill the cracks in rocks they are called:

• A. Dikes
• B. Veins
• C. Seams
• D. Lodes

Answer: (B)

When hot underground water carrying dissolved minerals moves through cracks in rocks and then cools or reacts, minerals precipitate out of the solution and fill those openings. This creates mineral-filled fractures known as veins. Veins are the classic feature formed by hydrothermal deposition in cracks, often containing quartz or sulfide minerals and sometimes hosting ores. Dikes are formed by magma that intrudes and solidifies to fill across rock layers, not by mineral deposition from hot water. Seams aren’t the typical term for this hydrothermal filling of cracks, and while a lode can refer to a rich ore body, the precise term for minerals deposited in a crack is a vein.

When hot underground water carrying dissolved minerals moves through cracks in rocks and then cools or reacts, minerals precipitate out of the solution and fill those openings. This creates mineral-filled fractures known as veins. Veins are the classic feature formed by hydrothermal deposition in cracks, often containing quartz or sulfide minerals and sometimes hosting ores. Dikes are formed by magma that intrudes and solidifies to fill across rock layers, not by mineral deposition from hot water. Seams aren’t the typical term for this hydrothermal filling of cracks, and while a lode can refer to a rich ore body, the precise term for minerals deposited in a crack is a vein.