Minerals with atleast one Metallic elements

Example: Iron, Copper & Gold

Example: Limestone, gypsum & Mica

hot lava > cools down > hard rocks

primary/parent rocks

Organic matter trapped in sedimentary layers gets converted into Fossil Fuels. e.g. Shale, Standstone.

They form on layers of Rivers, Ocean. They dont go through any chemical change.

Formed by hardening and cementing of layers of sediments.

Under great heat, rocks undergo chemical change into a different form, called metamorphic

Example: Clay to Slate; Limestone into Marble; Carbon into Diamond

Sources of Energy formed over millions of years. E.g. Petrolium