How was slate made?

Answer 1

Slate starts as clay. Thhrough erosion and nature, the clay can change to shale or slate. Shale happens when layers upon layers are of clay and sediment are piled together and held in place with something very very heavy. Slate is altered shale that had low heat and not very much pressure put on it. It takes thousands of years for slate to change. Slate can be any color but is mostly found in gray or black. When it is broken, it splits into layers.