Question

11. Why non-metallic minerals we can find in sedimentary rocks.​

Answer 1

Explanation:

As the name suggests, non-metallic minerals are the minerals that do not contain metals, e.g. limestone, mica, coal, gypsum, dolomite, phosphate, salt, manganese, granite etc.

Answer 2

Answer:

It is because they are deposited by hydrothermal fluids in which the metallic ions are entrained. The hydrothermal fluids are squeezed out of the cooling host rock, being leftovers as the magma cools. They then cool in the fractures or within the cooled host rock forming veins and porphyries. Non-metallic minerals can form a lower temperatures as well as high temperatures, but hydrothermal deposits require much higher temperatures and pressures.