👉 The term "solenaceous" refers to a type of mineral that is found in the Earth's crust and can be classified as a type of igneous rock. Solenoids are hollow, solidified rocks that are composed of iron sulfide minerals, such as magnetite or chalcopyrite, which form when magma rises from the earth's mantle and cools. The term "solenaceous" is used in geology to describe these types of rocks because they often have a characteristic