Please answer the following question: Vein deposits of gold and silver are formed by igneous intrusion, and magma that cools slowly deep below the surface produces coarse-grained intrusive igneous rocks. Given these facts, when do vein deposits of gold and silver form among the following options: - When magma warms up - flow of electrons - it can be seen - permineralization - When magma cools - aqueous solution - When the air is cold - When water rises
Answer:
When magma cools